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老顶周期来压时,瓦斯涌出量减小。
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老顶周期来压时,瓦斯涌出量减小。
A、正确
B、错误
时间:2021-07-17 23:34
关键词:
安全工程
专升本
工业通风与除尘
2019级第三学期期末考试
答案解析
B
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