How many times______ not to play with fire?

－I’m sorry. I’ll never do that again.

A．do you tell

B．had you told

C．are you told

D．have you been told

心脏停搏时间是指从循环停止到（）

A.意识恢复

B.自主呼吸恢复

C.心脏自主节律恢复

D.重建有效人工循环

E.呼吸心跳恢复正常