![Whensomeplatesoftheearthmovesuddenly,anearthquakehappen...]( "Whensomeplatesoftheearthmovesuddenly,anearthquakehappen...")
- 問題詳情：Whensomeplatesoftheearthmovesuddenly,anearthquakehappens.___16___Earthquakesmayhappenanywhereontheearth.Theyoftenhappennearmountains.Duringanearthquake,theshakingsmakerocksrisesuddenlyandevencracksopen.___17__Andsometimeswholevillagesorcities...
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