The babies of the participants will be followed
A. throughout their lives.
B. for more than two decades.
C. from birth to 21 months.
D. until they get married.
查看答案
具有中枢性肌松作用的药物是()
A. 苯妥英钠
B. 安定(地西泮)
C. 水合氯醛
D. 苯巴比妥钠
E. 眠尔通
In the forest corresponding to the following binary tree, how many children does node Bhave ?
A. 31
B. 2
C. 3
D. 4