studies have found that hitting children can’t alleviate negative emotions effectively. the reason could be that ( ).
elsa is upset when her mother is gone; after she returns, elsa approaches her to seek comfort and goes on to play under her guidance. elsa most likely belongs to the ( ) attachment type.
the mirror test is used to investigate children’s recognition of ( ).
举例说明新药监测期药品不良反应的报告范围和时间不同。
一般讲,市场经济是()发展到一定阶段的产物。
which of the following factors will affect the development of intelligence? ()
which of the following statements is supported by the existence of real-life wolf children? ( )
内标法定量的主要优点是()
which of the following statements about brain plasticity is correct ().
cindy iles more to her main caregiver and people she’s familiar with. she is less likely to ile to strangers. which stage of ile development could she be at? ( )
下列哪种方法能够创建带分组的报表( )
in order to measure children's peer relationship, the researcher asked the children to report, “who do you like (dislike) to play with the most?” or “who do you think is the most (un)popular person in the class?”. the method used by this researcher is ().
which of the following is not a typical feature of neoclassici in english literature?
dna或rna完整性的鉴定可采用紫外分光光度法进行。
由两个或两个以上产业活动位组成的法人位称为( )。
在核酸标记方法中,可用于标记待测样本总dna的方法有
基因工程大致可分为两个方向:
关于ti质粒描述正确的是
下列化合物中,哪个可发生歧化反应[坎尼查诺(cannizzaro)反应()。
基因文库主要有两类:基因组dna文库和cdna文库
1. chaucer has employed ________ in his poems, which was the predominant english measure for all the poetic kinds from the age of john dryden through that of samuel johnson , some poets, including alexander pope, used it almost to the exclusion of other meters.