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ID:52969960
大小:3.04 MB
页数:52页
时间:2020-04-15
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1、UNIT4AvisittothemoonDoyouwanttogotothemoon?Imaginewhatyouwillfeelwhenyouareinspace?Howdoestheforceofgravitychangeifyouvisitthemoon?gravity:forcethatattractsobjectsinspacetowardseachother.万有引力,重力,地心引力Whatistheearth’snaturalsatellite?Themoon.(自然卫星)thenaturalforcethatcausesanobjecttomovet
2、owardthecentreoftheearth.GravityThepulloftheearth’sgravitywilldisappearwhenyouareinspace.Youwillbeweightless.Thegravityofthemoonisverylight.Youwillweighlessthanontheearth.Spacewalk2..Ittakesthemoononedaytomovearoundtheearth.3.Theearthistheonlyplanetmovingaroundthesun.TrueorFalseTheeart
3、hmovesaroundthesun.TFFF4.Thereisatmosphereonthemoon.1._____wasthefirstpersonlandingonthemoon?A.ArmstrongB.YangliweiC.TomCruiseD.IssacNewton2.Whendidhelandonthemoon?A.1921B.1969C.1954D.19493.WhendidYangLiweigotothespace?A.Oct,2003B.Jan,2003C.Oct,2004D.Jan,2002ABAthefirstmaninspaceYuriGa
4、garinThefirstmanonthemoonNeilArmstrongRussia1961U.S.A.1969Doyouknowwhotheyare?ReadingAvisittothemoonChinahaslandedonthemoon.Now,let’ssetoutforthemoon!Skimthe4paragraphsquickly,andfindoutthetopicofeachparagraph:Para():Para():Para():Para():ThethingsIdidonthemoon.Weturnedbacktotheearth.La
5、stmonth,wevisitedthemoon.Howtheforceofgravitychangedwhenwetraveledfromtheearthtothemoon.1243Fastreading:TrueorFalseTheforceofofgravitywouldchangefourtimesontheirjourney.()2.Whentheywereonthemoon,theywouldnotfeelthegravitybecausetherewasnogravityonthemoon.()3.Sincethegravityhaschanged,t
6、heirwalkdidn’tneedalotofpractice.()FFFDetailedreading:ReadPara2carefullyandunderline3sentencesthatshowthechangesofthegravity.asheleftinspaceonthemoon)thewaygravitychangedlefttheearthinspaceonthemoonItbecameverylight.Thegravitybecameverystrong.Thegravitydisappeared.lefttheearthInspaceOn
7、themoonTheweightchangedHebecameveryheavy.Hehadnoweightandcouldfloatweightlesslyaroundintheirspaceship.Hewasaboutone-sixthofhisweightontheearth.Readthepassageandfillintheform.ThethreewaysinwhichgravitychangedforLiYanpingandhowhisweightchanged.1.Thepullofgravitybecameverystrongsheleftt
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