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全部科目 > 水路交通运输技能考试 > 海船船员考试 > 船舶管理(轮机专业) > 轮机英语 > 船舶电气与船舶安全

单项选择题

Convection is the principal means （） temperature is equilibrated in liquids and gases.

A.in which
B.on which
C.by which
D.from which

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If you （） the equipment more carefully before sail, we （） so much trouble now.

A.examined；are not having
B.had examined；would not have
C.had examined；would not have had
D.should examine；would not have

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We’ve tried many ways, but all in vainOnly in this way, （） the problem, I’m sure.

A.can we solve
B.we can solve
C.we will solve
D.can we solved

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Let H （） the quantity of heat which has been converted into mechanical work.

A.represent
B.represents
C.representing
D.being represented

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