问题
单项选择题
倒落式人字抱杆整立杆塔，抱杆的有效长度应控制在一个适合高度，一般为杆塔重心高度的（）倍。
A、0.8～1.1
B、1.1～1.2；
C、1.2～1.3；
D、0.6～1.0。
答案
参考答案：D
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倒落式人字抱杆整立杆塔，抱杆的有效长度应控制在一个适合高度，一般为杆塔重心高度的（）倍。
A、0.8～1.1
B、1.1～1.2；
C、1.2～1.3；
D、0.6～1.0。
参考答案：D
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