哪一个不是主动性异位心律失常（）
A.逸搏
B.期前收缩
C.心房颤动
D.心室扑动
E.阵发性心动过速
参考答案：A
水力警铃的工作压力不应小于()MPa。
A．0.5
B．0.1
C．0.08
D．0.05
I ____ to you as soon as I get there. [ ]
A. will write
B. wrote
C. write
D. have written
