心跳骤停时最常见的心律失常是()
A．室性心动过速
B．室性逸搏
C．室上性心动过速
D．心室颤动
E．心房颤动
参考答案：D
指针丢失
Chafing gear is used to（）.
A.anchor the boat
B.pick up heavy loads
C.protect fiber rope from abrasion
D.strengthen mooring lines
