可用于阵发性室上性心动过速的药物是()。
A.毛果芸香碱
B.吗啡
C.阿托品
D.杜冷丁
E.新斯的明
参考答案:E
Schools _____ allow students at least one hour a day for sports.[ ]
A. would
B. might
C. should
D. could.
( ).
A.
B.
C.
D.