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單項(xiàng)選擇題

Switchboards may be of the dead-front type in which all live parts are installed behind （） and only the operation handles and instruments are on the front.

A.the capstan
B.the collector
C.the panels
D.the surface

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單項(xiàng)選擇題

The emergency generator or emergency battery is connected to（） on most large ships.

A.distribution boards
B.section boards
C.emergency switch boards
D.main switch boards

單項(xiàng)選擇題

The main generators are connected to（）.

A.distribution boards
B.section boards
C.emergency switch boards
D.main switch boards

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