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  3. Earthquake belts are______. What can be said about the experiments at Rocky Mountain Arsenal?

Earthquake belts are______. What can be said about the experiments at Rocky Mountain Arsenal?

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问题 Earthquake belts are______.
What can be said about the experiments at Rocky Mountain Arsenal?
选项 A、They have no practical value in earthquake prevention
B、They may have practical value in earthquake prevention
C、They are certain to have practical value in earthquake prevention
D、The article does not say anything about their practioal value earthquake prevention
答案B
解析 归纳总结题。从文章最后一段倒数第二句 "They have suggested that might be possible to use this knowledge to prevent very big destructive earthquakes…"可推知科学家们在落基山脉所做的实验对于地震预防有一定价值，所以答案为B。
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