足月新生儿从母体获取的铁足够生后使用多久()
A.1~2周
B.3~4周
C.5~8周
D.2~3个月
E.4~5个月
参考答案:E
The most powerful protection against deviance is ______.
A.negative sanctions
B.severe punishments
C.the individual's conscience
D.unrestrained suppression
延胡索镇痛作用的特点是:()
A.对钝痛优于锐痛
B.对锐痛优于钝痛
C.副作用少而安全
D.无成瘾性
E.有成瘾性