搜题请搜索小程序“爱下问搜题”
问题 单项选择题

交界区性早搏的心电图特点为

A．提前出现的QRS波群
B．QRS形态与窦性一致
C．可见逆行P与QRS前、中、后
D．完全代偿间歇
E．以上都是

答案

参考答案：E

选择题

学好化学，就要学会归纳和总结，下列总结有错误的一组是

[ ]

A.A

B.B

C.C

D.D
查看答案
单项选择题

When the young man realized that the police had spotted him, he made （） the exit as quickly as possible, only to find that two policemen were waiting outside.

A．off

B．from

C．towards

D．for
查看答案