Thevolcanoisoneofthemostsurprisingfrighteningforcesofna...
问题详情：Thevolcanoisoneofthemostsurprisingfrighteningforcesofnature.Maybeyouhaveseenpicturesofthese“fireworks”ofnature.Sometimeswhenavolcanoerupts,averylargewallofmeltedrockmovesdownthesideofamounta...