心房扑动时听诊( )
A．心律一般规则B．心律绝对不规则C．呈二联律D．呈三联律E．呈胎心律
参考答案：A
— Could I ______ your MP3 player, please?
— Sorry. ______ is broken. [ ]
A. lend, It
B. borrow, It
C. have, This
D. keep, That
调车作业碰脱轨器或防护信号为险性事故。
