胆结石诱发的剧烈疼痛止痛应选用（）
A.可待因
B.哌替啶阿托品
C.吗啡
D.二氢埃托啡
E.阿司匹林
参考答案：B
壮秧的标准有（）和（）两方面。
_____ I know, Plato (柏拉图) was a great thinker in ancient Greece. [ ]
A. As far as
B. As long as
C. As well as
D. As many as
