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    教师资格证-高中-物理搜题用什么软件最好


    下列哪种机器人一定不属于工业机器人( )

    下列哪种机器人一定属于工业机器人( )

    下列哪个品牌不属于全球工业机器人四大家族( )

    下列哪个品牌不属于全球工业机器人四大家族( )

    下列哪个品牌不属于全球工业机器人四大家族( )

    下列哪个品牌属于全球工业机器人四大家族( )

    家用扫地机器人是工业机器人。

    娱乐机器人是工业机器人。

    侦查排爆机器人是工业机器人。

    abb的六轴机器人是工业机器人。

    yumi机器人是工业机器人。

    agv小车是工业机器人。

    蜘蛛机器人是工业机器人。

    分拣机器人是工业机器人。

    在1989年的国标草案中,工业机器人被定义为:一种自动定位控制,可重复编程的多功能的,多自由度的操作机。

    在1989年的国标草案中,工业机器人被定义为:一种自动定位控制,不可重复编程的多功能的,多自由度的操作机。

    工业机器人离线编程是一种虚拟仿真技术。

    工业机器人离线编程可以降低在线示教编程的成本、提高生产效率,应用极其广泛。

    abb的离线编程软件robotstudio支持kuka品牌工业机器人的仿真操作。

    abb的离线编程软件robotstudio支持fanuc品牌工业机器人的仿真操作。

    国产离线编程软件robotart支持abb品牌工业机器人的仿真操作。

    国产离线编程软件robotart支持fanuc品牌工业机器人的仿真操作。

    工业机器人离线编程是与现场编程完全无关的技术。

    进行工业机器人离线编程和仿真时需要考虑到现场的实际情况。

    要学好工业机器人离线编程只要跟着老师操作就够了。

    从机器人运动指令movel p10,v200,z10,mytool\\wobj:=wobj1;可以看出,机器人的运动速度是( )

    从机器人运动指令movel p10,v200,z10,mytool\wobj:=wobj1;可以看出,机器人的工具坐标框架是( )

    在搭建基本工业机器人工作站时,机器人与工件的位置可以随意摆放。

    在进行工业机器人离线仿真时,创建系统的操作相当于示教现场给机器人通电的操作。

    在进行工业机器人离线仿真时,可以不创建工件坐标。

    可以先进行示教指令操作,再进行手动创建路径操作。

    tcp是工具坐标系中心点的英文缩写。

    tcp是工件坐标系中心点的英文缩写。

    在进行工业机器人离线仿真时,可以不创建工具坐标。

    一个用户坐标系中可以包含多个(  ),用于表示固定装置、工作台等设备。 

    以下哪种不是robotstudio软件中创建机器人自动路径中的选项。

    在robotstudio软件中,想要控制机器人沿着一段既有圆弧又有直线的路径运行,在创建自动路径的时候选择以下哪个选项最佳。

    以下哪一项是robotstudio软件中生成机器人自动路径所必须的操作。

    以下哪一项是robotstudio软件中生成机器人手动和自动路径都要进行的操作。

    基于abb机器人坐标系的右手法则规定,大拇指的指尖表示z轴正方向。

    基于abb机器人坐标系的右手法则规定,食指的指尖表示x轴正方向。

    基于abb机器人坐标系的右手法则规定,中指的指尖表示y轴正方向。

    在空间中定义一个原点a,将机器人的基座中心点对准原点a,然后使用右手法则以原点a构建出的坐标系,我们称之为机器人的大地坐标系。

    tcp是工具坐标系中心点的英文缩写。

    tcp是工件坐标系中心点的英文缩写。

    单轴运动是指,每次手动操纵时,只驱动机器人的一个关节轴运动。

    线性运动是指,每次手动操纵时,机器人第6轴法兰盘上工具的tcp在空间中作线性运动。

    重定位运动是指,每次手动操纵时,机器人第6轴法兰盘上工具的tcp在空间中绕着坐标轴旋转的运动。

    在增量模式下,操纵杆每位移一次,机器人就移动一步,如果操纵杆持续一秒或数秒钟,机器人就会持续移动。

    想要有效扩大机器人的工作范围,下列哪种方法不可行。

    为机器人系统配备导轨,可以增加机器人的工作范围。

    robotstudio软件中,导轨的行程为4.9m,指的是导轨的可运行长度为4.9m。

    robotstudio软件中,导轨的行程为4.9m,指的是导轨的长度为4.9m。

    在带导轨的机器人系统中,需要设置机器人基坐标系随着导轨同步运动。

    带导轨的机器人系统轴参数配置方法和不带导轨的系统不同。

    变位机是通过改变加工工件姿态,来增大机器人的工作范围的。

    变位机是通过改变工具姿态,来增大机器人的工作范围的。

    在带变位机的机器人系统中,是将工件安装在变位机上。

    在带变位机的机器人系统中,是将机器人安装在变位机上。

    在带变位机的机器人系统中,需要添加外轴控制指令来控制变位机的激活与失效。

    从机器人运动指令movel p10,v200,z10,mytool\\wobj:=wobj1;可以看出,机器人的运动速度是( )

    从机器人运动指令movel p10,v200,z10,mytool\wobj:=wobj1;可以看出,机器人的工具坐标框架是( )

    一个用户坐标系中可以包含多个(  ),用于表示固定装置、工作台等设备。

    机器人如果用2个工件坐标系表示同一工件在空间中的2个不同位置,可称之为( )。

    以下哪种不是robotstudio软件中创建机器人自动路径中的选项。

    在robotstudio软件中,想要控制机器人沿着一段既有圆弧又有直线的路径运行,在创建自动路径的时候选择以下哪个选项最佳。

    以下哪一项是robotstudio软件中生成机器人自动路径所必须的操作。

    以下哪一项是robotstudio软件中生成机器人手动和自动路径都要进行的操作。

    要查看目标点处的工具姿态,可通过( )选项实现。

    下列哪种机器人一定不属于工业机器人( )

    下列哪种机器人一定属于工业机器人( )

    下列哪个品牌不属于全球工业机器人四大家族( )

    下列哪个品牌属于全球工业机器人四大家族( )

    agv小车是工业机器人。

    abb的离线编程软件robotstudio支持kuka品牌工业机器人的仿真操作。

    在搭建基本工业机器人工作站时,机器人与工件的位置可以随意摆放。

    在进行工业机器人离线仿真时,创建系统的操作相当于示教现场给机器人通电的操作。

    在进行工业机器人离线仿真时,可以不创建工件坐标。

    可以先进行示教指令操作,再进行手动创建路径操作。

    tcp是工件坐标系中心点的英文缩写。

    单轴运动是指,每次手动操纵时,只驱动机器人的一个关节轴运动。

    线性运动是指,每次手动操纵时,机器人第6轴法兰盘上工具的tcp在空间中作线性运动。

    重定位运动是指,每次手动操纵时,机器人第6轴法兰盘上工具的tcp在空间中绕着坐标轴旋转的运动。

    在robotstudio软件中,选择到对应的曲线即可完成表面边界创建。

    在robotstudio软件中,通过自动路径生成的默认轨迹运动方向为逆时针。

    在robotstudio软件若想实现轨迹运动方向的置反,可通过自动路径选项中的反转按钮。

    在robotstudio软件的自动路径选项中,生成的目标点z轴方向会与选定的参考面处于垂直状态。

    在robotstudio软件中进行轴参数配置时,工业机器人几个关节轴的运动范围数值越大越好。

    在robotstudio软件中,可先生成单个的目标点,再将其添加到已经创建的路径中。

    在robotstudio软件中,每个单个的目标点只能向已经创建的路径中添加一次。

    在robotstudio软件中进行碰撞检测设定时,每一碰撞集仅能包含两组对象。

    what is the structure of composing a good academic essay? and what is the role of each part in the essay writing?

    please yze the structure and organization of text 18 (page213-216) by identify its writing style and stating its thesis, major points and conclusion.

    what sections are most research papers ided into?

    please explain imrd rhetorical structure, including the pattern of its movement and the specific functions of each part.

    a research question is a statement that identifies the focus of the topic. what two purposes does it serve?

    please read text 3 and text 4 respectively on page 12 & 15 and then list their research questions respectively? text 3 research questions 1:________________________________________________ research questions 2:________________________________________________ research questions 3:________________________________________________ text 4 research questions 1:________________________________________________ research questions 2:________________________________________________ research questions 3:________________________________________________

    please read text 3 and text 4 respectively on page 12 & 15 and then answer the following questions? text 3: 1. how many types of cloud services are there and what are they? 2. what is green computing? 3. what are the advantages of the cloud computing? text 4 1. what is web 3.0 2. what are the advantages and disadvantages of the cloud computing? 3. what security benefits can the cloud computing provide?

    what are the four moves that an introduction usually consists of?

    what are the five types of qualification when making claims?

    .what are the three ways to defend a generalization?

    what are the rhetorical framework and elements of the discussion section according to swales & freak?

    what are the five central components of an abstract? how many types of abstracts are frequently used for publication and what are they?

    what elements should be included in a summary?

    what are the 3 steps in writing a summary? give more detailed explanation.

    write a one-sentence summary of source material 2 on page 80.

    what is the structure of composing a good academic essay? and what is the role of each part in the essay writing?

    please yze the structure and organization of text 18 (page213-216) by identify its writing style and stating its thesis, major points and conclusion.

    in persuasive writing, what are the 2 major ways to show that one idea (the author’s view) is more legitimate than another idea?

    what kind of topic is appropriate for developing an argumentative essay? how to develop an argumentative essay according to toulmin method?

    下列指标不是表示毒物毒性上限指标的是( )

    通常,饲料中有害物质在动物体内主要的排泄途径是( )

    通常,经口摄入的毒物在动物体内主要的吸收部位为

    通常饲料中有毒物质的剂量-反应关系的曲线类型是

    通常,经口摄入的毒物在动物机体内发生生物转化的部位为( )

    毒物的最大无观察到有害作用剂量属于毒性下限指标。( )

    通常,体格好采食量大的动物后表现饲料中毒症状。( )

    经口摄入的毒物在动物体内主要的吸收部位是胃。( )

    英汉互译:毒物

    英汉互译:抗营养因子

    英汉互译:剂量-反应关系

    英汉互译:半数致死量

    小麦中水溶性非淀粉多糖主要是( )

    糠麸类饲料中普遍存在的抗营养因子为植酸,植酸酶对植酸的降解是十分有效的,植酸酶效率最高的钙:总磷比值为( )

    发芽马铃薯的饲喂量应控制在( )

    小麦中主要的水溶性非淀粉多糖是( )

    高粱中含有影响饲料适口性以及蛋白质和矿物质的消化吸收的物质是( )

    糠麸类饲料中普遍存在的抗营养因子为( )

    猪采食不新鲜的全脂蚕蛹会产生“黄猪肉”, 引起这种变化的原因是

    桶装油脂一定要贮存于室内阴凉干燥处,而且要防止直接接触的金属是( )

    防止油脂氧化酸败,可在饲料中添加的物质为( )

    未成熟或发芽的马铃薯果实中主要的有毒物质为( )

    高粱中的单宁为水解单宁。( )

    为消除植物性饲料中非淀粉多糖的抗营养作用,生产中多采用添加相应的酶制剂。( )

    用木薯作饲料时,应在日粮中适当添加赖氨酸。( )

    ddgs中不饱和脂肪酸含量较高的是( )

    在高游离棉酚的棉籽饼粕中,为了脱毒可加入适量的 ( )

    菜籽饼粕中可使褐壳蛋系蛋鸡产生腥味蛋的物质是( )

    棉籽饼粕中影响禽蛋品质,使煮熟的鸡蛋变为“橡皮蛋”的有害物质是( )

    棉籽饼粕中影响禽蛋品质,使鸡蛋贮存后蛋清变为桃红色的有害物质是( )

    棉籽饼粕中影响雄性动物生殖机能的有害物质是( )

    菜粕中具有影响饲料适口性、能引起动物胃肠炎、肾炎,并引起动物甲状腺肿的硫苷降解产物为( )

    棉籽饼粕中影响雄性家畜生殖机能的有害物质是结合棉酚。( )

    “双低”油菜指菜油中芥酸含量低于2%、脱脂饼粕中硫苷含量低于30μmol/g品种的油菜。( )

    脲酶活性不能有效反映豆粕热加工加热过度的程度。( )

    花生饼作为饲料时要注意在日粮中补充适量的硒。( )

    卫生品质不良的鱼粉中引发仔鸡出现“黑吐病”的物质是( )

    在饲料、饮水供给充分的情况下,对食盐最敏感的动物是( )

    采用相同的原料,所生产的鱼粉品质最好的加工方式为( )

    生产和保存血粉的水分应最高控制在( )

    鱼粉中引起肉仔鸡出现“黑吐病”的机理是( )

    能引起“黄猪肉”产生的动物性蛋白质饲料( )

    淡水鱼、贝类、甲壳类的组织,尤其是内脏中含有的抗维生素为( )

    为了防止不新鲜鱼粉引起“黑吐病”,可在肉鸡日粮中添加适量的( )

    引起猪出现特征理学变化为“嗜酸性白细胞性脑膜脑炎”的物质是硝酸盐。( )

    酸价可用来评价脂肪氧化的程度。( )

    挥发性盐基氮可用来评价动物性饲料蛋白质的新鲜度。( )

    评价油脂的新鲜程度可用霉菌总数。( )

    产毒菌株与其所产的霉菌毒素之间无严格的专一性。()

    下列哪种症状不是呕吐毒素中毒的典型症状 ( )

    呕吐毒素的毒性与动物的种类有关,猪比鸡鸭对呕吐毒素毒性更加敏感。

    下列哪种症状不是t-2毒素中毒的典型症状 ( )

    t-2毒素的毒性与动物的种类有关,猪比鸡对呕吐毒素毒性更加敏感。

    丁烯酸内酯的主要毒性作用为( )

    一般,经口摄入的串珠镰刀菌素的靶器官是( )

    下列哪种症状不是伏马菌素中毒的典型症状

    伏马菌素能造成马脑白质软化症及猪肺水肿,但对免疫器官无毒害作用。

    下列哪种症状不是甘薯黑斑病毒素中毒的典型症状( )

    下列哪种症状不是麦角生物碱中毒的典型症状 ( )

    具有雌激素样作用的霉菌毒素为( )

    可用作霉菌毒素吸附剂的物质是( )

    可用作霉菌毒素防霉剂的物质是( )

    发霉的羊茅草中引起牛烂蹄病的霉菌毒素是( )

    雏鸭经口摄入黄曲霉毒素b1中毒的典型病变为( )

    发霉且生成黑斑的甘薯中含有的霉菌素素是( )

    下列畜禽中对呕吐毒素毒性最敏感的动物是( )

    经口摄入的霉菌毒素在动物体内的主要吸收部位是( )

    一种产毒霉菌可产生几种霉菌毒素,一种霉菌毒素也可由多种产毒霉菌产生。( )

    单端孢霉烯族毒素的主要产毒菌为单端孢霉烯属霉菌。( )

    饲料安全在保证动物健康的同时,既涉及动物源食品安全,也影响到环境生态安全。

    《饲料添加剂安全使用规范》中“在配合饲料或全混合日粮中的最高”为推荐性指标,饲料企业和养殖单位可参考执行。

    制定饲料中某种物质每日允许摄入量直接依据的毒理学指标是( )

    下列标准属于强制性标准的是( )

    以“gb/t”为代号的标准,为( )

    需要获得生产许可证和产品批准文号才能进行生产的饲料类别是

    我国现行的饲料法规体系中级别最高的法规为《饲料和饲料添加剂管理条例》()

    急性经口毒性试验最重要的目的是得出受试物的( )

    90天经口毒性试验是研究受试物 ( )的常用方法

    慢性毒性试验用到的雌性实验动物必须( )

    以小鼠为实验动物开展有机汞经口急性毒性实验,适宜的给药方式为( )

    以大鼠为实验动物开展氢氰酸经口急性毒性实验,适宜的给药方式为( )

    制定饲料中某种有害物质每日允许摄入量,直接依据的毒理学指标是

    通常亚急性毒性实验的实验期限约为实验动物寿命的

    亚急性毒性实验是指一次或在24h内多次重复将受试物给予动物,观察短时间内动物可能出现的毒性表现的实验。( )

    亚硝酸盐的主要毒性为

    生氰糖苷在动物体胃肠道内水解,产生的主要有毒物质是

    豆类籽实中水苏糖和棉籽糖又被称为

    消除小麦中主要的抗营养因子非淀粉多糖酶的抗营养作用,经济有效的处理方法是

    解救亚硝酸盐急性中毒的肉牛可以静脉注射的试剂为

    双香豆素对家畜的主要有害作用为

    能消除皂苷能引起的反刍动物瘤胃臌气的饲料是

    硫葡萄糖苷在畜禽体内主要代谢产物具有的共同的有害作用是

    为了脱毒,在游离棉酚含量高的配合饲料中可加入适量的

    菜粕中可水解产生噁唑烷硫酮、硫氰酸酯、异硫氰酸酯等产物的抗营养因子为

    菜籽粕中使褐壳蛋系的蛋鸡产出腥味蛋的有害物质是

    为了防止不新鲜鱼粉引起“黑吐病”,可在肉鸡日粮中添加适量的物质是

    棉籽粕中影响雄性动物生殖机能的有害物质是

    对雄性家畜生殖功能具有较强毒性的重金属为

    生产的鱼粉品质的工艺为

    规定饲料中有毒有害物质的的标准是

    规定饲料添加剂限制性使用规定的法规是

    棉籽粕中能引“橡皮蛋”产生的有害物质是

    单端孢霉烯毒素的主要产毒菌为

    过量摄入引起猪中毒,出现嗜酸性白细胞性脑炎的物质是

    常见畜禽对呕吐毒素敏感性最高的为

    评价脂肪新鲜程度的指标为

    家畜铅中毒可用的解毒剂为

    霉变的花生粕中主要的有害物质为

    能抑制n-亚硝基化合物合成的物质是

    饲料中糜蛋白酶抑制剂适宜的消除方法是热处理。

    最大无观察到有害作用剂量属于毒性上限指标。

    通常,家畜饲料中毒症状表现为体温升高。

    .饲料中草酸盐对畜禽的主要危害为引起泌尿道结石

    感光过敏引起皮炎的部位为家畜的深色皮肤处

    鱼粉中造成肉仔鸡肌胃糜烂的主要物质是霉菌毒素

    矿物质饲料添加剂主要的卫生学问题是重金属元素超标。

    防霉剂不能消除饲料中已经存在的霉菌毒素。

    通常,控制饲料的水分活度能有效控制霉菌的生长及产毒。

    铅在动物体内的主要富集的组织也是其靶组织。

    矿物质饲料添加剂主要的卫生学问题是重金属元素超标。

    镰刀菌产毒的适宜条件是高温高湿的仓储条件。

    无机五价砷的急性毒性小于有机砷。

    制定饲料中某种物质每日允许摄入量直接依据的毒理学指标是最大无作用剂量。

    无公害食品在种植过程中在农药、化肥的使用上较绿色食品限制更严格。

    does-response relationship

    ld50

    free gossypol

    afb1

    rapeseed meal

    非淀粉多糖

    鱼粉

    蛋白酶抑制剂

    抗营养因子

    霉菌毒素

    请论述雏鸭黄曲霉毒素b1中毒的典型症状以及防控饲料中黄曲霉毒素b1危害的措施。

    when compile a c program, the comments will .

    a file written by c language .

    many programming languages borrow heavily form c language, including c , c# .

    one of c’s advantages is efficiency. because c was intended for applications where assembly language had traditionally been used, it was crucial that c programs could run quickly and in limited amounts of memory.

    c’s weaknesses arise from the same source as many of its strengths: c’s closeness to the machine.

    which of the following is a legal c identifier?

    which of the following is not keyword in c language?

    which of the following is not a constant in c language?

    which of the following is not a float constant in c language?

    the three identifiers, weight, weight and weight, are not equal in c language.

    in c language, which of the following operator requires its operands must be of type int?

    of which operation the precedence is higher than others’?

    the value of the expression 3.6-5/2 1.2 5%2 is ____.

    suppose all variables in the following expressions have been declared and initialized, which of the following is not a legal expression in c language?

    if an expression is the sum of four data of different types, including int, long, double and char, the expression’s type is ____.

    the expressions i and i are exactly not the same as (i = 1).

    if c is a variable of type char, which one of the following statements is illegal?

    suppose that we call scanf as follows: scanf(“%d%f%d”, &i, &x, &j); if the user enters: 10.8 9 3↙ what will be the values of i, x, and j after the call? (assume that i and j are int variables and x is a float variable. ↙ is used to represent enter key)

    suppose that we call scanf as follows: scanf(“%f%d%f”, &x, &i, &y); if the user enters: 12.3 45.6 789 what will be the values of x, i, and y after the call? (assume that x and y are float variables and i is an int variable. ↙ is used to represent enter key)

    which one of the following is correct?

    assuming the following statements: char c1='1',c2='2'; c1=getchar(); c2=getchar(); putchar(c1); putchar(c2); if input a└┘↙ when run the code, ↙ is used to represent enter key, └┘ is used to represent space, which one of the following statements is correct?

    given the following declarations and scanf function call statements, to make the value of a1, a2, c1, c2 to be 10, 20, a and b respectively. which one of the following inputs is correct? ↙ is used to represent enter key and └┘ is used to represent space. ( d ) int a1,a2; char c1,c2; scanf("%d%d",&a1,&a2); scanf("%c%c",&c1,&c2);

    assuming the statement scanf("a=%d,b=%d,c=%d",&a,&b,&c); to make the values of a, b, and c to be 1, 3, 2 respectively, which of the following input is correct? ↙ is used to represent enter key and └┘ is used to represent space.

    if the variable x is of type double, which one of the following statements is right?

    what is the output of the following code? └┘ is used to represent space. float x=-1023.012; printf("%8.3f,",x); printf(" % 10.3f",x);

    what is the output of the following code? int x=13,y=5; printf("%d",x%=(y/=2));

    if we declared int a=1234;, what is the result when executing the statement printf("-",a);?

    what is the output of the following code? int a; char c=10; float f=100.0; double x; a=f/=c*=(x=6.5); printf("%d %d %3.1f %3.1f",a,c,f,x);

    execute the following statements, if input 12345678↙,what is the output? int a , b ; scanf("-%*2d=",&a,&b); printf("%d",a b);

    c compilers are required to check that the number of conversion specifications in a format string matches the number of output items.

    if the format string is “%d\n”, scanf will skip white space, read an integer, and then skip to the next non-white-space character. so a format string like this can cause an interactive program to “hang” until the user enters a nonblank character.

    after the execution of the following statements: int a=1, b=2, c=3, d=4, m=2, n=2, cond; cond = (m=a>b) && (n=c>d); , which one of the following value is equal to the value of n ?

    suppose i is a variable of type int, and its value is 10, which of the following is the value of expression 30-i<=i<=9 ?

    after the execution of the following statements: int a=0,b=0,m=0,n=0; (m=a==b)||(n=b==a);,the values of m and n are and respectively?

    which of the following is equal to the expression !x ?

    suppose int x=3,y=4,z=5; , which of the following is the value of the expression !(x y) z-1 && y z/2 ?

    which of the following is not a legal expression in c language?

    the expression in if(expression) can be .

    when execute the following program: #include int main() { int x,y; scanf("%d%d",&x,&y); if (x>y) x=y;y=x; else x ;y ; printf("%d,%d",x,y); return 0; } which one of the following is correct?

    in c language, the rule on embedded if statement is that else is always paired with .

    if a=1, b=3, c=5, d=4,the value of x is when execute the following program. if (a
    which one of the following is equal to the statement y=(x>0 ? 1: x<0 ? -1:0); .

    which one is correct when execute the following code? int x=0,y=0,z=0; if (x=y z) printf("***"); else printf("###");

    what is the output of the following program? #include int main() { int x=1,y=0,a=0,b=0; switch(x) { case 1: switch (y) { case 0 : a ; break ; case 1 : b ; break ; } case 2: a ; b ; break ; case 3: a ; b ; } printf("a=%d,b=%d",a,b); return 0; }

    if int i=10; the value of i will be after executing the following code. switch (i) { case 9: i =1 ; case 10: i =1 ; case 11: i =1 ; default: i =1 ; }

    given the declaration: float w; int a, b; , which one of the following is a legal switch statement?

    if int i=1; the value of i will be after executing the following code. switch (i) { case '1': i =1 ; case '2': i =1 ; case '3': i =1 ; default : i =1 ; }

    after the execution of the following statements: int i=5, j=4, k=6 ; float f; f = (i
    after the execution of the following statements: int m1=5,m2=3; m1>m2 ? (m1=1):(m2=-1);, the values of m1 and m2 are respectively?

    switch statements can be totally replaced by if statements at any time.

    the expression in a case label of a switch statement must be constant expression.

    the statement if and switch can be embedded.

    the conditional expression and if statement can be totally replaced by each other.

    duplicate case labels aren’t allowed in switch statement.

    in switch statement, several case can execute the same program segment.

    the controlling expression in switch statement can be an expression of any type.

    the case branch in switch statement can be a compound statement or multiply statement sequence.

    without break (or some other jump statement) at the end of a case, control will flow into the next case.

    what is the output of the following program? #include int main() { int x=0,y=5,z=3; while(z-->0&& x<5) y=y-1; printf("%d, %d, %d",x,y,z); return 0; }

    which one of the following contains an infinite loop?

    the following code . x=-1; do{ x=x*x; }while (!x);

    which one of the following statements is correct?

    assume the following code: int n=0,p; do { scanf("%d",&p); n ; } while (p!=12345 && n<3);when , the loop will terminate.

    given the following for statement: int i,k; for (i=0,k=-1; k=1 ; i ,k ) printf("***"); which one of the following conclusions is correct?

    the loop times of the following for statement are . for (i=2; i==0;) printf("%d",i--);

    what is the output of the following program? #include int main() { int i,sum; for(i=1;i<6;i ) sum =i; printf("%d",sum); return 0; }

    assume s, a, b, c are declared as integers, and a, c have been assigned values (c>0), s=a; for(b=1; b<=c; b ) s=s 1;which one of the following is equal to the above code?

    what is the output of the following program? #include int main() { int i=0,s=0; for (;;) { if(i==3||i==5) continue; if (i==6) break; i ; s =i; }; printf("%d",s); return 0; }

    if the variables i and p have been declared and initialized correctly, which one of the following cannot calculate 5! ?

    in the following programs, which one has the different output with the others’?

    what is the output of the following program? #include int main() { int k=0,m=0,i,j; for (i=0; i<2; i ) { for (j=0; j<3; j ) k ; k-=j ; } m = i j ; printf("k=%d,m=%d",k,m); return 0; }

    which one of the following is not correct?

    assume the following program fragment: int k=2; while (k=0) { printf("%d",k) ; k-- ; }which one of the following is correct?

    while in do statement can be omitted sometimes.

    any of the 3 expressions in for loop can be omitted, and so is while and do statement’s controlling expression.

    the most powerful iteration statement is for statement.

    the loop body in the for statement will be executed at least once.

    break can be used in switch statements and loops (while, do, and for), whereas continue is limited to loops.

    which one of the following statements is wrong?

    which one of the following statements about macro substitute is wrong ?

    assuming we have #define l(x) 2*3.14*x,thus l(x) is .

    assuming we have #define p(x) x/x, what is the output after executing printf("%d",p(4 6)); ?

    assuming the macro definition #define mod(x,y) x%y, what is the result of the following code? int z,a=15; float b=100; z=mod(b,a); printf("%d",z );

    which one of the following macro for square calculation will not cause ambiguity in any case?

    given a macro definition as follows: #define n 3 #define y(n) ((n 1)*n), which one of the following is the value of the expression 2*(n y(5 1))?

    given a macro definition #define p(x,y,z) x=y*z; the substitution p(a,x 5,y-3.1) will be .

    in the file including preprocessing directives, when the file name is enclosed by double quotes after #include, the file will be searched in .

    in the file including preprocessing directives, when the file name is enclosed by angle bracket after #include, the file will be searched .

    macro substitution does not have type problem, and its arguments are of no type either.

    in c language standard library header files, many system function prototype are declared. therefore, as long as these functions are used in the program, these header files should be included, for checking the function calling by compiling system.

    the header files included by #include must have the suffix .h.

    when index the array element, which one of the following statements is wrong?

    which one of the following declarations can define a one dimensional array a correctly in c89?

    assume a declaration int a[10]; , which one of the following can reference the element in a correctly?

    which one of the following statements is wrong?

    assume the declaration int a[3][4]; which one of the following can index the element in a correctly?

    assume the declaration int a[3][4]=; which one of the following statements is correct?

    if a 2-d array a has m columns, the formula to index the element a[i][j] is .

    what is the output of the following code? int k,a[3][3]={1,2,3,4,5,6,7,8,9}; for (k=0;k<3;k ) printf("%d",a[k][2-k]);

    which one of the following initialization is correct for the 2-d array a?

    assume the declaration int b[]={1,2,[8]=3,4,5,[15]=1,6,7}; the length of array b is .

    which one of the following statements about function is right?

    which one of the following statements is right?

    which one of the following function definitions is right?

    if call a function int f(), which does not contain any return statement, which one of the following conclusions is right?

    which one of the following determines the return type of a function in c language?

    which one of the following statements about function return type is wrong?

    which one of the following statements is wrong?

    which one of the following is right?

    given a function definition as follows: void f(char ch, float x ) { ...... } which one of the following function call statements is right?

    assume a program defines a function as follows: double f(double a,double b) { return (a b); } but the definition is written after calling f. therefore, f should be declared before the calling. which one of the following prototypes is wrong?

    which one of the following statements about function declaration is wrong?

    if an array name is used for an actual parameter in a function calling, which one of the following will be delivered to the corresponding formal parameter?

    given the following code in the main function, which one of the following is an incorrect declaration of the formal argument in function f? int a[3][4]; f(a);

    read the following program: int fun1(double a) { return a*=a;} int fun2(double x,double y) { double a=0,b=0; a=fun1(x); b=fun1(y); return (int)(a b); } if w is a variable of type double, what is the value of w, after executing the statement w=fun2(1.1,2.0);?

    both function definition and function call can be nested.

    a function must have a return value, otherwise it cannot be defined as a function.

    specifying that the return type is void indicates that the function doesn’t return a value.

    the pointer of a variable indicates the of the variable.

    given int k=2; int*ptr1,*ptr2; and both ptr1 and ptr2 point to the variable k, which one of the following assignments is not correct?

    given int*p,m=5,n; which one of the following statements is right?

    given int*p,a=4; and p=&a; in which one of the following, all items indicate addresses?

    if a pointer p points to a variable x, which one of the following is equal to *&x ?

    if the pointer p points to an integer variable x, which one of the following is equal to (*p) ?

    for two pointer variables of the same base type, which one of the following operations cannot be done?

    given the following function and the variable declaration int a=25; which one of the following is the result of the statement print_value(&a); ? void print_value(int *x) { printf("%d", *x); }

    given char s[10]; which one of the following is not the address of s[1]?

    given int a[5],*p=a; which one of the following is a correct reference to an element in array a ?

    given int a[5],*p=a; which one of the following is a correct reference to the address of an element in array a ?

    given int x[]={1, 2, 3, 4, 5, 6, 7, 8, 9, 0},*p=x,k; and k is larger than or equal to 0 and less than 10, which one of the following is a wrong reference to the array element x[k]?

    given int x[6]={2,4,6,8,5,7},*p=x,i; which one of the following code cannot output the 6 elements in array x in order?

    given int a[2][3]; which one of the following is a correct reference to the address of the element in i-th row and j-th column of array a?

    given int a=3,b,*p=&a;which one of the following statements doesn’t assign the value 3 to b?

    given int a[4][5]; which one of the following references is incorrect?

    given int a[2][3],(*p)[3]; p=a; which one of the following references to an element in the array a is correct?

    given int (*p)[4]; which one of the following statements is right?

    the return value of the function char* fun(char *p){ return p; } is .

    assuming char x[]="12345",y[]={'1','2','3','4','5',''}; which one of the following statements is correct?

    which one of the following initializations of the character array s is wrong?

    which one of the following character arrays cannot be used as a string?

    which is the output of the following code? char c[5]={'a','b','','c',''}; printf("%s",c);

    given two arrays of character, a and b, which one of the following statements is correct?

    which is the output of the following code? char a[7]="abcdef"; char b[4]="abc"; strcpy(a,b); printf("%c",a[5]);

    which is the output of the following code? char c[]="\t\b\\\0will\n"; printf("%d",strlen(c));

    which one of the following can be used to test whether the string a is greater than b?

    the value of the expression strcmp("3.14","3.278") is .

    given the following code: #include #include int main() { char p[]={'a','b','c'}, q[10]={'a','b','c'}; printf("%d %d", strlen(p), strlen(q)); return 0; } which one of the following statements is true?

    which is the output of the following code? char w[][10]={"abcd","efgh","ijkl","mnop"} , k; for(k=1;k<3;k ) printf("%s",w[k]);

    if the function fun is defined as: void fun(char ch[], float x) { …… }, which one of the following function call statements is correct for function fun?

    which one of the following statements about character array is wrong?

    which one of the following is correct?

    which one of the following statement(s) is a correct for the string s?

    given char s[]="china"; char *p ; p=s ; which one of the following is correct?

    given char a[]="itiine", *p="itiine"; which one of the following is incorrect?

    given char *cc[2]={"1234","5678"}; which one of the following is correct?

    assume s1 and s2 are declared correctly, if we want to execute the statement s when string s1 is greater than s2, which one of the following statements is correct?

    given char s1[]="string1",s2[8],*s3,*s4="string2"; which one of the following is incorrect for library function strcpy?

    given a structure definition as follows: struct stu { int a; float b; } stutype; , which one of the following statements is wrong?

    for which one of the following definitions, the compiler will not allocate memory locations.

    which one of the following definitions of the structure variable td1 is wrong?

    when declare a structure variable, the size of space allocated by system is .

    given the declaration of a structure tag named student as follows: struct student { int no ; char name[20]; char sex; struct { int year; int month ; int day ; } birth; } s; if the member birth of the structure variable s is october 1, 2016. which one of the following assignments is right?

    given the following code, which one of the following statements can output the letter m. struct person { char name[9]; int age; }; struct person class[10]={"johu",17,"paul",19,"mary",18,"adam",16};

    which one of the following reference to a member of structure is not right? struct pupil { char name[20]; int age; int sex; } pup[5], *p=pup;

    which one of the following reference is not right? struct s { int i1; struct s *i2,*i0; }; static struct s a[3]={2,&a[1],0,4,&a[2],&a[0],6,0,&a[1]}, *ptr=a;

    given the following declaration: struct sk { int a; float b; } data; int *p; which one of the following assignments is right, to make p point to a in data?

    given the declaration: struct{int a; char b;} q,*p=&q; which one of the following expression is wrong?

    given the following code: struct st { int x; int *y; } *pt; int a[]={1,2},b[]={3,4}; struct st c[2]={10,a,20,b}; pt=c; which one of the following expressions has the value of 11?

    which one of the following statements about union is right?

    when declare a union variable, the size of space allocated by the compiler is .

    given the following program: union { char a[10]; short b[4][5]; long c[5]; } u; the value of sizeof(u) is .

    given the following program: union data { char ch; int x; } a; which one of the following is not right?

    given the following declaration: enum color {red,yellow=2,blue,white,black} r=white; what is the output after executing the statement printf("%d",r); ?

    given the following declaration: enum week {sun, mon, tue, wed, thu, fri, sat} day; which one of the following assignments is right?

    which one of the following statements is wrong?

    given the following statement: typedef struct {int n;char ch[8];} per; which one of the following statements is right?

    which one of the following is correct about data file and c language?

    the system standard input file is .

    the system standard output file is .

    which one of the following is a correct file name argument for the function fopen?

    given char fname[]="infile.dat"; , which one of the following is a correct way to open the text file infile.dat for reading?

    which one of the following is a correct way to create a file for both reading and writing using the function fopen ?

    if errors occur while executing the function fopen, what is its return value?

    if open an existing file using the argument "a ", which one of the following is correct?

    in the file open modes, the string "rb" indicates .

    when opening the text file "a:\\aa.dat" in the mode "w", if the file already exists, .

    in c program, which one of the following can write an integer data into a file in binary form?

    which one is the prototype of the function fputc that write a character to the disk files?

    which one of the following operations can be done using the function fseek?

    the function calling fseek(fp,-20l,seek_end) complete the operation .

    which one of the following codes is nearly equal to fseek(fp,0l,seek_set)?

    the function rewind can .

    the function ftell(fp) can .

    which of the following is a legal c identifier?

    in c language, which of the following operator requires its operands must be of type int?

    the following code . a=-1; do{ a=a*a; }while (!a);

    suppose int x=3,y=4,z=5; , which of the following is the value of the expression !(x y) z-1 && y z/2 ?

    suppose that we call scanf as follows: scanf(“%f%d%f”, &a, &c, &b); if the user enters: 12.3 45.6 321 what will be the values of a, c, and b after the call? (assume that a and b are double variables and c is an int variable.)

    if c is a variable of type char, which one of the following statements is illegal?

    what is the output of the following code? int a; char c=10; float f=100.0; double x; a=f/=c*=(x=6.5); printf("%d %d %3.1f %3.1f",a,c,f,x);

    execute the following statements, if input 87654321↙,what is the output? int a , b ; scanf("-%*2d=",&a,&b); printf("%d",a b);

    after the execution of the following statements: int a=1, b=2, c=3, d=4, t1=2, t2=2, k; k = (t1=a>b) && (t2=c>d); , which one of the following value is equal to the value of t2 ?

    suppose int a=3,b=4,c=5; , which of the following is the value of the expression !(a b) c-1 && b c/2 ?

    assume a declaration int t[10]; , which one of the following can reference the element in t correctly?

    assume the declaration int b[]={1,2,[8]=3,4,5,[15]=1,6,7,9}; the length of array b is .

    what is the output of the following code? int k,a[3][3]={3,2,3,3,5,6,7,3,9}; for (k=0;k<3;k ) printf("%d",a[k][2-k]);

    given a structure definition as follows: struct mystr { int a; float b; } mytype; , which one of the following statements is wrong?

    which is the output of the following code? char w[][10]={"abcd","efgh","ijkl","mnop"} , k; for(k=1;k<3;k ) printf("%s",w[k]);

    the loop body in the for statement will be executed at least once.

    without break (or some other jump statement) at the end of a case, control will flow into the next case.

    in switch statement, several case can execute the same program segment.

    the expression in a case label of a switch statement must be constant expression.

    the three identifiers, wendy, wendy and wendy, are equal in c language.

    please describe the functions of the arrays, such as when or why should we use arrays, what problems we can solve with arrays, etc.

    according to your answer above, design a programming question about the arrays, and write the program with comments. so , you shoulde write: your question about the arrays your code (your program) with comments

    please describe the functions of the pointers, such as when or why should we use pointers, what problems we can solve with pointers, etc.

    web工程师的岗位职责

    网页制作的开发工具有哪些?

    网页结构和表现相分离,我们通常用一个 html 文档来保存内容与结构,用一个 ( )文档来控制整个文档的表现。

    由于( )是网页制作的标准语言,因此无论什么样的网页制作软件,都提供直接以该语言方式来制作网页的功能。

    html静态html文件后缀名为( )

    html文件可以用文本编辑器编辑。

    dreamweaver开发平台默认的静态网站凯时尊龙登录入口主页文件名为( )

    dreamweaver开发平台的文件菜单中创建的网页需要执行保存,才能将文件保存到网站中

    网页可分为静态网页和动态网页

    dreamweaver平台中,如果需要连续输入多个空格,只能通过编辑菜单的首选参数里进行设置才行。(

    通常我们通过dreamweaver创建的站点分为哪几种?

    在实际工作中,通常为每一个要处理的网站建立一个本地站点,这样可以方便地对网站内部的文件进行组织、维护和管理。

    可以通过下面样式设置文本的水平对齐方式( )

    下面哪个标签元素不是属于块元素( )

    下面哪个样式可用来设置段落文字的行距?

    哪些是html5中新增加的元素( )

    关于样式的描述,哪些是正确的

    一个网页可以引用多个样式文件

    在css盒子模型中,盒子的总占位宽由( )决定

    在使用css3盒模型时,box-sizing属性设置为( ),元素的宽度只是该元素内容的宽度,而不包括边框和内边距的宽度

    下面哪个样式设置是错误的

    设置一个边框线为1px的实线红色边框代码为( )

    在浏览页面时,请求的页面不存在或者链接错误时,服务器通常会做出什么反应?

    关于字体大小的单位描述,哪个是不正确的

    当字体属性设置为.style1{font-family:“黑体”,“隶书”,”楷体”;}时,代表意思是

    对链接导航文字样式的说法,哪个描述是不正确的

    链接元素的伪类需要按一定的顺序定义,下面哪 个顺序是正确的( )

    伪类是指一个标签元素,具有不同的形态,如鼠标经过时一个形态、鼠标点击时一个形态

    一个层中所引用的样式设置了背景图(background-repeat属性没有设置),另外设置了padding属性为:padding:5px 10px;下面哪个说法是正确的?

    图文混排页面,第一个层图片在文字左边,第二个层图片在文字右边,哪个说确:

    下面关于图层的描述哪个是不正确的?

    位图图像中像素越多、分辩率就越( ),描述图像就越细,像素能表示的色彩数越多,描绘的图像就越逼真

    photoshop图像中最基本的组成单元是( )

    下面哪些样式设置可以清除层的浮动继承

    添加清除浮动层的作用是( )

    position默认的属性值是( )

    对列表项ul块设置margin的外上边距为0作用是去掉ul默认外上边距对层的影响

    以下有关表单的说明中,错误的是?

    在指定单选框时,只有将以下()属性的值指定为相同,才能使他们成为一组。

    如果要在表单里创建一个普通文本框,以下写法中正确的是:

    以下有关按钮的说法中,错误的是:

    在html中,与表格一样,表单也能嵌套。

    以下选项中不能用来表示css颜色的是:

    在表单中添加一个默认时为选中状态的复选框,应使用语句___________。

    以下说法中,错误的是:

    在dreamweaver中,下面关于排版表格属性的说法错误的是:

    设置表格的行数和列数,不能采用的方法是()

    css sprite是一种网页图片应用处理方式。它允许将一个页面涉及到的所有零星图片都包含到一张大图中,在访问页面时,只需请求一次就可以。

    css3定义了两种类型的渐变?

    css3渐变不支持透明度,只支持颜色线性渐变。

    给一个设置动画效果,下面写确的是:

    设置动画时,必须规定动画的名称和animation-duration属性,否则默认时长为0,不会播放动画。

    自由基反应价的断裂方式

    光照下烷烃卤代反应的机理是通过( )中间体进行

    生成的一元取代物是

    下列化合物与br2发生自由基取代时选择性最好的是

    下列自由基最稳定的是

    下列化合物中自由基取代时含有最活泼的h的是

    下列化合物中碳原子杂化轨道为sp3的有

    下列物质进行一氯取代反应后,只能生成四种沸点不同的产物的烃是

    烯烃与卤素在高温或光照下进行反应,卤素进攻的主要位置是

    写出反应机理

    烯烃与溴的亲电加成是通过什么历程来进行的( )

    下列化合物中碳原子杂化轨道为sp2的有( )

    下列烯烃与hbr反应的最快的是( )

    下列碳正离子中最稳定的是( )

    三种碳正离子(i)ch3ch2ch2ch2 ;(ii)ch3ch ch2ch3;(iii)(ch3)3c 稳定性顺序为( )

    用化学方法区别乙烯和乙烷,可选用的试剂有

    烯烃与卤素在高温或光照下进行反应,卤素进攻得主要位置是( )

    关于丙烷和丙烯分别氯气发生自由基取代反应的描述中,正确的是( )

    与3,3-二甲基丁烯加成生成2-溴-2,3-二甲基丁烷的反应机理是什么( )

    下列化合物与溴加成反应时速度最快的是( )最慢的是( )

    可能产物

    写出反应机理

    写出反应机理

    在过氧化物存在下,烯烃与hbr的反应属于( )

    下列自由基最稳定的是( )

    丙烯与hbr的加成反应,在下列哪些条件下可以得到1-溴丙烷( )

    异丁烯与hbr的加成反应,得到( )

    烯烃在光照下与下列哪种物质发生过氧化物效应

    可能的产物

    可能的产物

    写出反应机理

    烯烃硼氢化氧化反应通过什么历程来进行的( )

    同一化合物

    具有p-π共轭体系的有( )

    最稳定的碳正离子( )

    下列化合物与hbr进行亲电加成反应,最快的是( )

    下列化合物与hbr进行亲电加成反应,最快的是( )

    己-1,3,5-三烯与1mol溴加成,最不易形成的产物是( )

    写出反应机理

    写出反应机理

    下列各化合物与与agno3(醇溶液中)反应的活性最强的是( )

    按亲核取代反应的难易次序排列正确的是( ) (1) ch3ch=chcl, (2) ch 2=chch2cl, (3)ch 3ch2ch2cl

    下列物质与硝酸银的乙醇溶液反应,最先生成agbr 沉淀的是( )

    下列化合物按sn2反应活性最大的为 ( )

    下列化合物,哪一个最易起sn2反应?( )

    溴代甲烷在丙酮中与ki反应中间体(intermediate)为:( )

    下列化合物哪个更易发生分子内sn2反应( )

    下列离去基团的离去能力最大。( )

    .按下列化合物进行sn1反应活性最大的( )

    下列化合物,苯环上起亲核取代反应速率最快的是( )

    下列化合物进行sn2反应,按反应速率由大到小排列,顺序正确的是( ) (1)1-溴丁烷 (2)1-溴-2,2二甲基-丁烷 (3)1-溴-2-甲基丁烷

    卤代烷与naoh在水和乙醇混合物中反应,属于sn2反应历程的特征是( )

    写出反应机理

    下列反应的主要产物是( )

    ( )主要产物

    ( )主要产物

    .①1-苯基-3-氯丙烷,②1-苯基-2-氯丙烷,③1-苯基-1-氯丙烷,三者按e1反应其速率由大到小排序为( )

    ( )主要产物

    写出反应机理

    写出反应机理

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