The box is full and heavy.A．True.B．False.

下列FPRTRAN77表达式中，值为.TRUE.的是（)。（A) .NOT..FALSE..AND..NOT..TRUE．（B) .FALSE..OR..NOT

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The man can carry the box.A．True.B．False.

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Big Ben is the name of a clock.A．True.B．False.

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The English in the U.S. is the same with that in the U.K.A．True.B．False.

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Americans and Englishmen have difficulties in understanding each other.A．True.B．False.

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Air leakage between the shaft and stuffing box packing in a centrifugal pump is prevented

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Which of the following statements is CORRECT？A．Fish has no fat and is full of vitamin A.B．

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