单项选择题

During operation, the （）should check the working condition of the derrick.

A.foreman
B.operator
C.opener
D.stevedore

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单项选择题
（）has more than ten percent broken wires. Stop using it at once.

A. The cargo runner
B. The cargo block
C. The derrick sling
D. The lashing wire
单项选择题
It is flammable cargo. Keep it away from the （）.

A.gangway
B.bow
C.boiler
D.stern
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