问题
单项选择题
A single heavy wire made up for the topping lift is called a（）.
A.bale
B.spanner wire
C.bull line
D.working guy
答案
参考答案：A
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A single heavy wire made up for the topping lift is called a（）.
A.bale
B.spanner wire
C.bull line
D.working guy
参考答案：A