题目内容

当药包埋置在地表附近时，岩石除了破碎和振动外，还由于破碎岩石的膨胀而在地表隆起或抛离地表并开成一个爆破坑，称为____。
A 爆破漏斗
B 破碎漏斗
C 破碎坑

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&8226;Which advertisement does each statement 1-7 refer to7
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A
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B
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C
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D
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