单项选择题
The running wheel runs along （）on top of the hatch coaming.
A. the guide rail
B. the guide rope
C. the side coaming
D. the guide roller
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相关考题
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单项选择题
Could you show me （）to open the hatch covers?
A.why
B.when
C.how
D.what -
单项选择题
If the hatch cover does not move, （）should be checked.
A. the open valve
B. the stop valve
C. the steam valve
D. the close valve -
单项选择题
To ensure the safety in operating hatch covers, oil the moving parts （）.
A. monthly
B. every three months
C. once monthly
D. every two months
