当代对戏曲的了解主要是通过影视的渠道。

变压器室、配电室、电容器室的门应( )。

A．向内开启
B．向外开启
C．双向开启
D．以上说法都不对

芯头有哪三大功能？

A J-chaser is used to（）.

A.transfer a pennant wire to the anchor handling vessel

B.clean chain as it is hauled into the rig

C.lower spring buoys into the water

D.retrieve an anchor after the buoy has been lost

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