题目内容

Prolonged operation of a diesel engine with a closed cooling water system, at lower than normal designed operating temperatures can ______.

A. increase power output
B. decrease lube oil viscosity
C. eliminate fuel knock
D. cause sulfuric acid formation

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The field coils and the armature(电枢) . This is in fact the arrangement adopted for large, heavy duty alternators.

A. are stationary(固定的)/rotates
B. are stationary/is stationary
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D. rotate/rotate