临床试验中最常见的偏倚是()
A.失访
B.霍桑效应
C.安慰剂效应
D.发表偏倚
E.错分偏倚
参考答案:B
颅内压增高的病因是()
A.老年性痴呆
B.神经系统变性病
C.闭塞性脑血管病
D.颅内占位性病变
E.脑先天性疾病
Human capacity for language has a g()basis, but the details of language have to be taught and learned.