氯丙嗪对下列哪种病因所致的呕吐无效（）
A.放射病
B.吗啡
C.晕动病
D.癌症
E.以上都不是
参考答案：C
--How is everything going in the school, my boy?
--_______.
A．I am all right, thanks
B．Not too bad, I guess.
C．Very well, thank you.
D．Not at all.
举例说明礼仪的培养为什么要求加强道德修养？
