－Where did you go _____ the morning of April 6?

－I didn’t come to the office _____ the meeting was over.

A．in, when

B．at, unless

C．on, until

D．to, though

为转复房颤病人的异位心律失常，护土在进行电复律治疗时错误的操作是（）

A．绝对卧床、保暖

B．电极放置位置正确

C．非同步电除颤

D．放电时抢救人员离开床沿

E．电极涂抹足够的电极糊