- 問題詳情:Thevolcanoisoneofthemostsurprisingfrighteningforcesofnature.Maybeyouhaveseenpicturesofthese“fireworks”ofnature.Sometimeswhenavolcanoerupts,averylargewallofmeltedrockmovesdownthesideofamountain.Itlookslikea“riveroffire.”Sometimesvolcanoese...
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