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为了使人们更多地了解地震的危害性,美国政府正在花费大量的资金致力于寻找两个问题的答案。这两个问题是什么呢?他们具体的做法又是什么呢?The U.S.governm ent has recentlyhelped people learn m ore about the dan-gers of earthquakes by publishing a m ap.This m ap shows the chances of an earth-quake in each part of the country.Th