单项选择题
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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相关考题
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单项选择题
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 -
单项选择题
The main generators are connected to（）.
A.distribution boards
B.section boards
C.emergency switch boards
D.main switch boards -
单项选择题
UMS stands for（）.
A.ultra much space
B.universal medium system
C.unit machined space
D.unattended machinery space
