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單項選擇題

If the ordered spare parts have been modified by manufacturer, which of the following should be pay attention to?（）

A.quality
B.reliability
C.price fluctuating
D.applicability

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單項選擇題

When replacing a part with a spare one, we should fill in tile spare parts consume table in time and make a mark in brief for （）

A.the reason of replacing
B.the course of replacing
C.crews who do this work
D.where and when the replacing being done

單項選擇題

Why the cooling water of the diesel engine should be treated? Because the（）

A.Cooling water is alkalescence
B.cooling water is acidity
C.cooling water has salinity
D.cooling water has impurity

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