混合堵是采用()相结合的方法。A、立堵与平堵 B、上堵与下堵 C、爆破堵与下闸堵 D、抛投块料堵与爆破堵

作者: rantiku 人气: - 评论: 0
问题 混合堵是采用()相结合的方法。
选项 A、立堵与平堵 B、上堵与下堵 C、爆破堵与下闸堵 D、抛投块料堵与爆破堵
答案 A
解析

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