钢丝绳如何分类？
参考答案：
分类：单绕绳、双绕绳、三绕绳。
30．—Why do you leave your daughter alone without worrying about her?
—She will ____ leave home to lead her own life．
A．consequently
B．previously
C．roughly
D．Eventually
当建筑物层高超过______米，在计算容积率时该层建筑面积加倍计算。
A．7B．8C．20D．30
