A.sub-boards
B.main switchboards
C.emergency switchboards
D.distribution boards
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A.check for respiration
B.check for pulse
C.treat for shock
D.All of the above
A.plastic
B.metal
C.stainless steel
D.copper
A.turn off power first
B.turn on power first
C.with a test pen in hand
D.tell C/E
A.ammeter
B.voltmeter
C.synchroscope
D.A+B+C
A.either；or
B.neither；nor
C.such；that
D.so；that
最新試題
The additional mark （）in the Classification Certificate for Machinery means propulsion apparatus is remotely controlled on the navigating bridge control station, and engine assembly control station is unmanned periodically.
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（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.
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Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）