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1、懂你Level2L2-U3-1/4listeningBusschedule1/aboutEarthA1.Hereisabusscheduleatabusstop.2.Ithasscheduleforthreebusesbetweeneightandninethirtyinthemorning.3.BusNo.38hasaregularschedule.4.Itcomeseveryfifteenminutes.5.Eightten,Eighttwenty-five,eightforty,eightfifty-five,nineten,nighttwenty-five.6.BusNo.
2、forty-sevencomeslessoften.7.Itcomesateighttwenty,eightforty-five,ninetwenty-five.8.BusNo.sixtyistheearliestbus.9.Itcomesateighto-five,eightthirty,andnineo’clock.10.BusNo.thirty-eighthasstopsatthemaintrainstationandtheairport.11.BusNo.sixtystopsatthemaintrainstation,butdoesgototheairport.12.Bus
3、No.forty-sevendoesn’tgotoeitherthemaintrainstationortheairport.B1.Thisisourplanetearth.2.Ithasshapeofasphere,likeaball.3.Theequator(地球的赤道)devicetheearthintotwohalvesequator.4.Thenorthernhalfisthenorthernhemisphere(半球体).5.Thesouthernhalfisthesouthernhemisphere.6.EuropeandAsiaarebothinthenorther
4、nhemisphere.7.AustraliaandathirdofAfricaareinthesouthernhemisphere.C25懂你Level21.Theearthmovesintwoways.2.First,it’sbeenandrotates.3.It’srotatesarounditsaxis.4.Theaxisisalinethroughitscenter.5.Ittakestheearthtwenty-fourhourstocompletearotation.6.Thatisthelengthofoneday.D1.Second,theearthtravels
5、aroundthesun.2.Ittakesaboutthreehundredsixty-fivedaysfortheearthtogoaroundthesun.3.Thatisthelengthofoneyear.4.It’saveragespeedduringtheyearisaboutthirtykilometerspersecond.E1.Theearth’saxisisnotperpendiculartothesun.2.Theearth’saxisistilted.3.Itistiltedatanangleofaroundtwenty-threepointfivedeg
6、rees.4.Thistiltcausestheseasonsoftheyear.F1.Duringpartoftheyear,northernhemisphereistiltedtowardthesun.2.Whenthenorthernhemisphereistiltedtowardthesun,itssummer.3.Whenthenorthernhemisphereistiltedawayfromthesun,itswinter.4.Thisiswhytheseasonsareoppositeforthenorthernandsouthernhemispheres.5.Wh
7、enit’ssummerinAustralia,it’swinterinEurope.G1.Whatwouldhappeniftheearth’stiltweredifferentthanitisnow.2.Iftheearthtiltswerelarger,summerwouldbehotter.25懂你Level21.Iftheearthtiltsweresmaller,summerswouldbecooler.2.Iftheearthhadnotiltatall
