问题
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Which of the following problems may occur when using fuel oil with a high sulphur content?
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A.A foreign language is very useful in getting a job with decent pay.B.We use a foreig
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Your vessel is not underway when ().A.Her anchor is draggingB.Her anchor is used in dockin
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When used with reversing reduction gears, medium-speed diesel engines should be bolted to
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When were the chemicals first used in America?A.Before the American Revolution.B.Over thir
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The police are working in conjunction with