单项选择题
A.quality B.reliability C.price fluctuating D.applicability
When replacing a part with a spare one, we should fill ...
单项选择题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
Why the cooling water of the diesel engine should be tr...
单项选择题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
The cooling water of the diesel engine should be treate...
单项选择题The cooling water of the diesel engine should be treated, because it has（）
A.alkale scence B.acidity C.salinity D.impurity
