【多选题】
遇有( )或导地线、拉线松动的杆塔，登杆前应先培土加固、打好临时拉线或支好架杆。 答案：A,C,D
A. 上拔
B. 下沉
C. 起土
D. 冲刷
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答案
ACD
解析
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杆塔作业应禁止以下行为：( ) 答案：A,B,C,D
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