题目内容 (请给出正确答案)
提问人:网友w*****2 发布时间:2022年4月6日 11:39
[单项选择题]

露天深孔爆破根据爆破规模分级进行管理,对于一次爆破总药量为()为D级大爆破。

A.100~500t

B.50~100t

C.30~50t

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