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单选,1分] 运输大巷的坡度一般为：【】
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单选,1分] 运输大巷的坡度一般为：【】
A、1‰～3‰
B、3‰～5‰
C、5‰～7‰
D、7‰～9‰
时间：2021-09-03 16:18
关键词：
联大
河南理工大学
采矿工程
采矿学
答案解析
B@#@B
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运输大巷的坡度一般为：【 】
运输大巷的方向应与（）走向大体一致，为便于运输和排水，其坡度一般为（）。
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单选,1分] 运输大巷的坡度一般为：【】
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