单项选择题

Latent heat changes the （）of water.

A.physical state
B.temperature
C.atmospheric pressure
D.sensible pressure

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单项选择题

A.it is difficult for them to finish the job in time
B.difficult for them to finish the job in time
C.they have much difficulty to finish the job in time
D.that difficult for them to finish the job in time

单项选择题

During port state control inspection, if one generator is out of commission, （）should investigate whether power is available and conduct tests.

A.the third engineer
B.the PSCO
C.the surveyor
D.the chief engineer

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During inspection of the machinery space, which of the following statements points to an unsatisfactory organization of the systematic maintenance?（）

A.missing valve hand wheels
B.dirty tank tops
C.a large number of temporary repairs
D.All of the above