试题详情
- 单项选择题吊杆停用时，稳索必须要收起来。（）
A、When the derrick is stopped, the guy must be stowed.
B、When the derrick is stopped, the guy must be topped.
C、When the derrick is stopped, the guy must be lowered.
D、When the guy is stopped, the derrick must be stowed.
- A
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