文档介绍:2019年托福考试模拟训练试题及答案1 InJulyof1994,,everyfewhours,-oddfragments,etShoemaker-Levy9afteritsdiscoverers,wereoncepartofthesameobject,,glisteninglikeastringofpearls,hadbeenfirstglimpsedonlyafewmonthsbeforeitsfatefulimpactwithJupiter,.TheimpactcausedanexplosionclearlyvisiblefromEarth,,icenergywastransformedintoheat,,someofwhichhavestretchedouttoformdarkribbons. Althoughthisimpacteventwasofconsiderablescientificimport,uriosityandinterest..,mostofhumanitycametofullyappreciatethefactthatweourselvesliveonasimilartarget,,,atleastingeologicterms,andwereevenmorefrequentintheearlysolarsystem. -Levy9? (A)bineinalargerbody. (B)SomeofthemburnedupbeforeenteringtheatmosphereofJupiter.