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Moisture absorbed in the windings or condensed on the surface of electrical machinery insulation （）
A:is good for long term preserving since most insulation is organic and contains some amount
B:lowers the insulation value and is a common cause of fault grounds in idle machines
C:will enhance insulation resistance only if it is fresh water and contains no salt
D:reduces the amount of current supplied or drawn by the machine so horsepower is limited

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出自：海船船员证

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