下列各种情况是引起心脏骤停的最常见的原因是
A．快速心房纤颤
B．室性快速心律失常
C．缓慢性心律失常
D．频发室性期前收缩
E．无脉性电活动
参考答案：B
怵惕
根据汉语提示完成句子。（每小题1分，每空1词）
小题1:Mr Zhang is always_______ ________(对…严格) his students.
小题2:Do you know how to_____ _____(处理，对付) this kind of problems?
小题3:You are_____ _____(不再) a child; try to do it by yourself.
小题4:Please_____it_____(仔细考虑)before making an important decision.
小题5:The driver_____ _____(减速) When he crossed the busy road.
