可阻断乙酰胆碱的作用：
A．氨茶碱
B．异丙基阿托品
C．二者均可
D．二者均不可
参考答案：B
408是8的______倍．
What ________ you do if you _________ a teacher? [ ]
A．would, are
B．can, were
C．will, are
D．would, were
