A.along
B.will
C.throughout
D.for
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A.an alternating
B.a rush
C.a direct
D.an exciting
A.disconnected
B.switched off
C.cut off
D.connected
A.voltage
B.current
C.power
D.frequency
A.An alternator
B.fresh water generator
C.A compressor
D.A clarifier
A.Switches
B.panels
C.alarm units
D.safety devices
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To proceed to the assistance of a ship in distress is（）
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