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單項選擇題

The majority of cargo gear breakdowns are a result of（）.

A.guy failures
B.topping lift failures
C.bending of the boom from compression
D.gooseneck failure

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The man directing and supervising the work of stevedores is the（）.

A.local agent
B.watchman
C.docker
D.foreman

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The pilot launches display the pilot flag（）.

A.at night
B.by day
C.when in fog
D.in bad weather

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