人教版高中英语必修三第四单元I、WarmingupI、WarmingupScientistsnowthinkPlutoistoosmalltobecalledaplanetThenamesofeightplanets海王星NeptuneInthisunit,we’lllearnsomethingmorescientificPanguseparatestheskyfromtheearthNvwamadehumansReadthepassagequicklyandanswerthequestionsPhrasesandUsefulExpressions121、Whendidthe“BigBang”happen?Ithappenedseveralbillionyearsago、2、Whatformwastheearthafterthe“BigBang”?Theearthwasstilljustacloudofdust、3、Whatmadeuptheearth’satmosphereaftertheearthexploded?Carbon,nitrogen,watervapourandothergases、4、Howdidwatereintobeingontheearth?Astheearthcooleddownafteritexploded,watercameintobeing、5、What’sthesignificanceofthepresenceofwaterontheearth?Itallowedtheearthtodissolveharmfulgasesandacidsintotheoceansandseas、6、Whatwasimportanttothedevelopmentoffish?oxygen、7、Whatmadepossibletheriseofmammalsontheearth?Thedisappearanceofdinosaursmadethepossibletheriseofmammalsontheearth、8、Whyaremammalsdifferentfromalllifeformsinthepast?Theygavebirthtoyoungbabyanimalsandproducedmilktofeedthem、Para、1A、Theformation(形成)oftheearth、Para、2B、Theimportanceofwaterforlife、Para、3C、Awidelyacceptedtheoryabouttheformationoftheuniverse、Para、4D、Thearrivalofhumansandtheirimpactontheearth、Para、5E、Thedevelopmentofplantsandanimalsontheearth、True(T)orFalse(F)、1、TheearthappearedbeforetheBigBanghappened、2、Theoriginalatmosphereconsistedofnitrogenandoxygen、3、Themaindifferencebetweentheearthandotherplanetsisthatthereiswaterontheearth、4、Lifebeganinwaterandthenonland、SummarySummaryPuttheorderofdevelopmentoflifeintoethereadingpassagetohelpyou、7、Theearthwasacloudofdust、()8、Waterappearedontheearth、(1)9、Shellfishandotherfishappeared、()10、Theuniversebeganwitha"BigBang"、()11、Cleveranimalswithhandsandfeetappeared、(12)12、Mammalsappeared、()discussingYoucanusethefollowingwordsorphrasestohelpyou:Homework