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题目内容
Many types of rocks contain small voids that ___________ vibrations: the greater proportion of a rock's volume that is void, the more gradually vibrations travel through it.
- Aamplify
- Bdampen
- Cgenerate
- Dimpede
- Eproduce
- Fconceal
B,D显示答案
以上解析由 考满分老师提供。