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【单选题】

If you were operating a centrifugal water service pump with worn wearing rings, the ().

A、pump would be very noisy

B、pump would vibrate excessively

C、pump would develop insufficient flow

D、stuffing box would leak excessively

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第1题

A、So are you  B、So you are  C、So you were  D、So were you  

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第2题

A、Compilation fails.  B、The code compiles and the output is 2.  C、If lines 16, 17 and 18 were removed, compilation would fail.  D、If lines 24, 25 and 26 were removed, compilation would fail.  E、If lines 16, 17 and 18 were removed, the code would compile and the output would be 2.  F、If lines 24, 25 and 26 were removed, the code would compile and the output would be 1.  

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第3题

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第6题

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第7题

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