下列哪种心律失常听诊时节律，速率可以正常（）

A.室性心动过速

B.阵发性室上性心动过速

C.快速房颤

D.心房扑动伴4：1传导

E.窦性心动过速

A preventer guy（）.

A.prevents anyone from working the cargo at unauthorized times

B.is a safety measure in case one of the outboard guys parts

C.is a longshoreman who watches for accidents

D.is the same as a blacksmith