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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,nighttwe
2、nty-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.sixtystopsatthemai
3、ntrainstation,butdoesgototheairport.12.BusNo.forty-sevendoesn’tgotoeitherthemaintrainstationortheairport.B1.Thisisourplanetearth.1.Ithasshapeofasphere,likeaball.2.Theequator(地球的赤道)devicetheearthintotwohalvesequator.3.Thenorthernhalfisthenorthernhemisphere(半球体).4.Thesou
4、thernhalfisthesouthernhemisphere.5.EuropeandAsiaarebothinthenorthernhemisphere.6.AustraliaandathirdofAfricaareinthesouthernhemisphere.C1.Theearthmovesintwoways.2.First,it’sbeenandrotates.3.It’srotatesarounditsaxis.4.Theaxisisalinethroughitscenter.5.Ittakestheearthtwent
5、y-fourhourstocompletearotation.6.Thatisthelengthofoneday.D1.Second,theearthtravelsaroundthesun.2.Ittakesaboutthreehundredsixty-fivedaysfortheearthtogoaroundthesun.3.Thatisthelengthofoneyear.4.It’saveragespeedduringtheyearisaboutthirtykilometerspersecond.E1.Theearth’sax
6、isisnotperpendiculartothesun.1.Theearth’saxisistilted.2.Itistiltedatanangleofaroundtwenty-threepointfivedegrees.3.Thistiltcausestheseasonsoftheyear.F1.Duringpartoftheyear,northernhemisphereistiltedtowardthesun.2.Whenthenorthernhemisphereistiltedtowardthesun,itssummer.3
7、.Whenthenorthernhemisphereistiltedawayfromthesun,itswinter.4.Thisiswhytheseasonsareoppositeforthenorthernandsouthernhemispheres.5.Whenit’ssummerinAustralia,it’swinterinEurope.G1.Whatwouldhappeniftheearth’stiltweredifferentthanitisnow.2.Iftheearthtiltswerelarger,summerw
8、ouldbehotter.3.Iftheearthtiltsweresmaller,summerswouldbecooler.4.Iftheearthhadnotiltatall,therewouldbenoseasons.5.The
