题目内容

Youshould（）themooringlinesaccordingtothechangesofdraft.

A. adjusted
B. adjusting
C. adjustment
D. adjust

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Thesailorsshouldshowtherelevant（）byday.

A. ladders
B. flags
C. hands
D. lines

Wecan’thoist（）nationalflag.

A. clean
B. worn
C. beautiful
D. good

Whenwehoistnationalflagtogetherwithotherflags,weshouldkeepthenationalflaginthe（）place.

A. centre
B. lower
C. A+B
D. AorB

定期维护属于（）。

A. 自主维护
B. 专业维护
C. 突发故障维护