单项选择题
Our heavy derrick has been （）(不用)for a long time.
A. out of order
B. out of date
C. out of danger
D. out of use
点击查看答案&解析
相关考题
-
单项选择题
（）(调高) the derrick, please.
A.High
B.Top
C.Adjust
D.Lower -
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
