考试中会出现学科类考题，因此大家在平时备考时就要积累相关的常识和词汇。为帮助大家了解天文类的托福听力考题，托福听力文本精选内容是月球和火星的重力，还给大家摘录整理了相关学科词汇，希望同学们认真学习和积累整理，为考试打下良好的基础。
LoctedttheNASAReserchCenterinIowis5,000-gllonvtofwter,ndinsidethetnkisnunderwtertredmilldesignedbyDvNewmn,nerospceengineer.ForfouryersNewmnobservedscubdiversstheysimultedwlkingontheMoonndonMrsonherunderwtermovingbelt.ShewntedtodiscoverhowthegrvityoftheMoonndofMrswouldffecthumnmovement.Todothis,Newmnttchedweightstothediversndthenloweredthemintothetnkndontothetredmill.TheseweightswerecrefullydjustedsothtthediverscouldexperienceunderwterthegrvityoftheMoonndofMrsstheywlkedonthetredmill.NewmnconcludedthtwlkingonMrswillprobblybeesierthnwlkingontheMoon.TheMoonhslessgrvitythnMrsdoes,sotlunrgrvity,thediversstruggledtokeeptheirblncendwlkedwkwrdly.ButtMrtingrvity,thedivershdgretertrctionndstbilityndcouldesilydjusttopceof1.5milesperhour.AsNewmngrdullyincresedthespeedofthetredmill,thediverstooklonger,grcefulstridesuntiltheycomfortblysettledintonevenquickerpce.NewmnlsonotedthttMrtingrvity,thediversneededlessoxygen.ThedtNewmncollectedwillhelpinthefuturedesignofMrtinspcesuits.Compredtolunrspcesuits,Mrtinspcesuitswillrequiresmllerirtnks;nd,tollowforfreermovement,theelbowndkneeresofthespcesuitswilllsobeltered.
【生词摘录】
1.gllon:n.AmEunitformesuringliquids,equlto3.785litres【美】加仑(等于3.785升)
2.vt:n.[C]verylrgecontinerforstoringliquidssuchswhiskyordye,whentheyrebeingmde(酿酒、盛染料用的)大缸，大桶
3.tnk:n.[C]lrgecontinerforstoringliquidorgs(盛放液体或气体的)大容器
4.tredmill:n.[C]millworkedinthepstbyprisonerstredingonstepsfixedtoverylrgewheel(过去用以惩罚犯人的)踏车
5.erospce:dj.involvingthedesigningndbuildingofircrftndspcevehicles航空和航天(器制造)的n.[U]theindustrythtdesignsndbuildsircrftndspcevehicles航空和航天工业，航天工业
6.scubdiving:n.[U]thesportofswimmingunderwterwhilebrethingthroughtubeconnectedtocontinerofironyourbck斯库巴潜泳，水肺潜泳(戴自携式潜水呼吸器潜泳)
7.simulte:v.tomkeorproducesomethingthtisnotrelbuthstheppernceofbeingrel模仿，模拟
8.Mrtin:dj.oforreltingtotheplnetMrs火星的
9.stride:n.[C]longstep大步，阔步
10.elbow:n.[C]thejointwhereyourrmsbends肘
老托福听力文本精选：月球和火星的重力就是这样的，同学们读懂了吗?更多相关的考题大家可以咨询网的在线老师了解一下。希望大家能够做到多多做题，积累更多相关知识，以便更好的完成考试!