【单选题】【消耗次数：1】
51、采用倾料式布置方式时，上区段的分层运输平巷与下区段的分层回风平巷之间常留有区段煤柱，煤柱尺寸视煤层厚度、倾角、煤质松软程度等因素而定，一般情况下煤柱宽度不小于（ ），或更大。
①
5m
②
20m
③
15m
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相关题目
【单选题】
74、在区段运输平巷和轨道平巷之间留设区段煤柱，对于一般煤质和围岩条件的近水平、缓斜及倾斜煤层，薄及中厚煤层不小于（ ）m。
①
8~15
②
15~20
③
20~30
【单选题】
52、（ ）布置就是将下分层平巷置于上分层平巷内侧，即处于上分层采空区下方，形成正梯形的区段煤柱。各分层平巷内错半个至一个巷道宽度。
①
水平式
②
外错式
③
内错式
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That probably explains why public opinion is broadly __________ euthanasia (安乐死), or at least certain forms of it.
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in relation to
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separate
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distinguish
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compare
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severe
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facilities
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apply
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cultivate
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to give
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giving
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would be died
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①
take in
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