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单选题
Winch gears must be maintained in proper alignment to prevent （）.
A
overheating of the lube oil
B
over-speeding of the motor
C
wear on the braking system
D
damage to the teeth
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单选题Electrical wiring on all “T-Boats” must be（）。A
concealed to prevent mechanical damageB
concealed so the boat can be maintained more easilyC
protected from the weatherD
in an accessible place behind the ceiling
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