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【Daily Discussion】Utilities - Civil Engineering - 20210224

2021-02-28View Original

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In earthwork projects, soil and rock can be classified into eight categories based on the difficulty of excavation, among which ( ) belongs to category six soil. Choose one: A. Hard rock B. Very hard rock C. Soft rock D. Slightly hard rock. Feel free to participate actively in the discussions; the system offers generous rewards for answering questions from VIP members! ! !

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