对快波睡眠时相影响极小的药物是（）
A.苯巴比妥
B.水合氯醛
C.甲丙氮酯
D.地西泮
E.戊巴比妥
参考答案：B, D
A．(A) We should not take our ability to listen for granted.
B．(B) We should have the right listening style for a particular situation.
C．(C) We should try different listening styles one after another.
D．(D) We should be faithful to one listening style all the time.
婴幼儿的年龄是（）。
A.0～2岁
B.0～4岁
C.0～5岁
D.0～7岁
E.0～9岁
