单项选择题
The word “offset” most probably means（）
A.predetermined value
B.measured value
C.off-limit
D.sustained deviation
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B.integral control
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In the event of failure of an auxiliary such as a lubricating pump, the standby pump is started and put on the line automatically“the line” in this sentence refers to（）
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Which of the following is NOT the advantages of the remote control and automation of engine operations?（）
A.Routine supervisory labor particularly the unproductive night-service labor is reduced
B.Engine mal-operation is automatically sensed and manned
C.The engine room need be manned at night in bad weather or close waters
D.Some remedial measures can be taken automatically
