老托福听力partc小马精选

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1、智课网TOEFL备考资料operationissafe.(5)Notetheuseofzincplatedpartsmustnotforgetmullionsandtransferbetweenthepreservativetreatments.2.20verticalboxcorrectionandacceptance1.Description:verticalboxinstallationwithboltfixedHou,onwholeinstallationfinishedofverticalboxforco

2、rrection,correctionofwhilealsotoonmain老托福听力partc小马精选摘要：老托福听力partc小马精选，老托福听力对新托福听力的备考依然有重要的作用,老托福听力的语速比较快,有助于提高同学们的辨音能力,小马过河整理老托福听力PartC精选第三期，考生们不妨练习一下。LocatedattheNASAResearchCenterinIowaisa5,000-gallonvatofwater,andinsidethetankisanunderwatertreadmilldesigned

3、byDavaNewman,anaerospaceengineer.ForfouryearsNewmanobservedscubadiversastheysimulatedwalkingontheMoonandonMarsonherunderwatermovingbelt.ShewantedtodiscoverhowthegravityoftheMoonandofMarswouldaffecthumanmovement.Todothis,Newmanattachedweightstothediversandthenl

4、oweredthemintothetankandontothetreadmill.TheseweightswerecarefullyadjustedsothatthediverscouldexperienceunderwaterthegravityoftheMoonandofMarsastheywalkedonthetreadmill.NewmanconcludedthatwalkingonMarswillprobablybeeasierthanwalkingontheMoon.TheMoonhaslessgrav

5、itythanMarsdoes,soatlunargravity,thediversstruggledtokeeptheirbalanceandwalkedawkwardly.ButatMartiangravity,thedivershadgreatertractionandstabilityandcouldeasilyadjusttoapaceof1.5milesperhour.AsNewmangraduallyincreasedthespeedofthetreadmill,thediverstooklonger

6、,gracefulstridesuntiltheycomfortablysettledintoanevenquickerpace.NewmanalsonotedthatatMartiangravity,thediversneededlessoxygen.ThedataNewmancollectedwillhelpinthefuturedesignofMartianspacesuits.Comparedtolunarspacesuits,Martianspacesuitswillrequiresmallerairta

7、nks;and,toallowforfreermovement,theelbowandkneeareasofthespacesuitswillalsobealtered.【生词摘录】1.gallon:n.AmEaunitformeasuringliquids,equalto3.785litres【美】加仑(等于3.785升)2.vat:n.[C]averylargecontainerforstoringliquidssuchaswhiskyordye,whentheyarebeingmade(酿酒、盛染料用的)大缸

8、，大桶operationissafe.(5)Notetheuseofzincplatedpartsmustnotforgetmullionsandtransferbetweenthepreservativetreatments.2.20verticalboxcorrectionandacceptance1.Description:verticalboxins