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單項(xiàng)選擇題

It was （）midnight that we removed the trouble and went back to our cabin.

A.until
B.not until
C.not before
D.not after

單項(xiàng)選擇題

Which of the statements listed concerning heat transfer is correct?（）

A.Heat is always transferred at a constant rate
B.Heat transfer rate increases as temperature difference increases
C.The rate of heat transfer is not affected by temperature difference
D.The high temperature region is known as a heat sink

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The diesel engine consumes considerably less fuel than the steam engine for equal output, （） enables a motor-ship to load more cargo.

你可能感興趣的試題

It was （）midnight that we removed the trouble and went back to our cabin.

Which of the statements listed concerning heat transfer is correct?（）

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