治疗地高辛引起的室性旱搏（期曹收缩）的首选药是（）
A.奎尼丁
B.苯妥英钠
C.利多卡因
D.胺碘酮
E.普鲁卡因胺
参考答案：B
The number of people invited _____ fifty, but a number of them _____ absent for different reasons. [ ]
A. were; was
B. was; was
C. was; were
D. were; were
统计表制作的要点包括（）
A.文字工整，字迹清晰
B.数字填写整齐，数位对准
C.数字忽略不计时可以留白不填
D.某项资料免填时用“╳”代替
E．当数字左右上下相同时，可以用“同左”“同上”代替
