A.after the point is reached at which the failures begin to increase rapidly
B.before the point is reached at which the failures begin to increase rapidly
C.before the point is reached at which the failures begin to increase slowly
D.after the point is reached at which the failures begin to increase slowly
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A.no equipment in contact with sea water
B.less equipment in contact with fresh water
C.more equipment in contact with sea water
D.less equipment in contact with sea water
A.the temperature
B.the rust
C.the pressure
D.the humidity
A.pumped speed；came out
B.pumping rate；overflowed
C.flowing rate；leaked out
D.flowed speed；spilled out
A.machined
B.bored
C.honed
D.drilled
A.ship draft
B.pitch
C.engine load
D.oil viscosity
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Proper filtering and straining of fuel oil is important because the （）.
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