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1、L2-U3-1/4listeningBusschedule1/aboutEarthA1.Hereisabusscheduleatabusstop.2.Ithasscheduleforthreebusesbetweeneightandninethirtyinthemorning.3.BusNo.38hasaregularschedule.4.Itcomeseveryfifteenminutes.5.Eightten,Eighttwenty-five,eightforty,eightfifty-five,nineten,ni
2、ghttwenty-five.6.BusNo.forty-sevencomeslessoften.7.Itcomesateighttwenty,eightforty-five,ninetwenty-five.8.BusNo.sixtyistheearliestbus.9.Itcomesateighto-five,eightthirty,andnineo’clock.10.BusNo.thirty-eighthasstopsatthemaintrainstationandtheairport.11.BusNo.sixtys
3、topsatthemaintrainstation,butdoesgototheairport.12.BusNo.forty-sevendoesn’tgotoeitherthemaintrainstationortheairport.B1.Thisisourplanetearth.2.Ithasshapeofasphere,likeaball.3.Theequator(地球的赤道)devicetheearthintotwohalvesequator.4.Thenorthernhalfisthenorthernhemisp
4、here(半球体).5.Thesouthernhalfisthesouthernhemisphere.6.EuropeandAsiaarebothinthenorthernhemisphere.7.AustraliaandathirdofAfricaareinthesouthernhemisphere.C1.Theearthmovesintwoways.2.First,it’sbeenandrotates.3.It’srotatesarounditsaxis.4.Theaxisisalinethroughitscente
5、r.5.Ittakestheearthtwenty-fourhourstocompletearotation.6.Thatisthelengthofoneday.D1.Second,theearthtravelsaroundthesun.2.Ittakesaboutthreehundredsixty-fivedaysfortheearthtogoaroundthesun.3.Thatisthelengthofoneyear.4.It’saveragespeedduringtheyearisaboutthirtykilom
6、eterspersecond.E1.Theearth’saxisisnotperpendiculartothesun.2.Theearth’saxisistilted.3.Itistiltedatanangleofaroundtwenty-threepointfivedegrees.4.Thistiltcausestheseasonsoftheyear.F1.Duringpartoftheyear,northernhemisphereistiltedtowardthesun.2.Whenthenorthernhemisp
7、hereistiltedtowardthesun,itssummer.3.Whenthenorthernhemisphereistiltedawayfromthesun,itswinter.4.Thisiswhytheseasonsareoppositeforthenorthernandsouthernhemispheres.5.Whenit’ssummerinAustralia,it’swinterinEurope.G1.Whatwouldhappeniftheearth’stiltweredifferentthani
8、tisnow.2.Iftheearthtiltswerelarger,summerwouldbehotter.1.Iftheearthtiltsweresmaller,summerswouldbecooler.2.Iftheearthhadnotiltatall,therewouldbenoseasons.3.The
