Which of the following items don’t belong to dock repair works?（）

单项选择题When ship in the dock repairing, engine department should emphasize on the inspection of（）

A.sea valve chest, sect valve, thruster
B.bilge motherboard, steering and the shaft system
C.sea water system
D.fresh water system

单项选择题We should apply for annual spare parts according to（） Ⅰ.he need of annual overhaul Ⅱ.he storage of spare parts Ⅲ.he storage capacity of spare parts room

A.Ⅰ
B.Ⅱ
C.Ⅰ+Ⅱ
D.Ⅲ

单项选择题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

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

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