吊杆停用时，稳索必须要收起来。（）<br>A:When the derrick is stopped, the guy must be stowed.<br>B:When the derrick is stopped, the guy must be topped.<br>C:When the derrick is stopped, the guy must be lowered.<br>D:When the guy is stopped, the derrick must be stowed.

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.

出自：船舶水手证

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