挖土方:是指宽度>3m或面积>20m2或平整场地厚度在±30cm以上的挖土工程()
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在()时需考虑土的可松性
A. 进行土方的平衡调配
B. 计算填方所需挖土体积
C. 确定开挖方式
D. 确定开挖时的留弃土量
E. 计算运土机具数量
We needn’t keep our fingers separated and independent while playing the piano()
We need to fully lower our wrists to help perform while playing the piano()
The playing direction of the flat is toward the left of the piano()