相关考题
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单项选择题
（）(降下)the derrick, please.
A. Lower
B. Top
C. Hoist
D. Take down -
单项选择题
Before the operation of the derrick, check all （）(索具)closely and everything must be in good condition.
A.blocks
B.goosenecks
C.tackle
D.guys -
单项选择题
The（）(地脚货) must be bagged.
A. bagged cargo
B. delicate cargo
C. sweepings
D. inboard cargo
