时文拓展阅读7 好奇号记录火星最大甲烷含量.docx

《时文拓展阅读7 好奇号记录火星最大甲烷含量.docx》由会员分享，可在线阅读，更多相关《时文拓展阅读7 好奇号记录火星最大甲烷含量.docx（3页珍藏版）》请在第一文库网上搜索。

1、时文拓展阅读I“好奇号”记录火星最大甲烷含量自20世纪初期开始，人们凭着望远镜中看到的火星影像和头脑中的想象，认为火星上可能存在生命，乃至火星人。正是这种对神秘星球的无限遐想，促使人类一次一次地进行探索，一次一次地将遥远星际之外的秘密带回地球。最近好奇号又给人类历史上增添了怎样的光彩呢？一起来看看吧。阅读短文并回答问题NASA,sCuriosityvehic1erecent1yrecordedthe1argest1eve1ofmethane（甲烷）evermeasuredduringitsseven-yearMarsmission.Thediscoveryisexcitingbecauseth

2、eexistenceofmethanegascou1dsupportthecasefor1ifeonMars.Methanehasnoco1ororsme11.Aspecia1instrumentonCuriosity,sMarsScience1aboratoryrecordedtheincreasedgas1eve1.Thedevice,ca11eda1aserspectrometer,measures1eve1sofchemica1e1ementsandgasesintheMartianatmosphere.Inadditiontomethane,theinstrumentcanrecor

3、d1eve1sofwaterandCO2.Near1ya11themethanegasfoundinEarth,satmosphereisproducedbybio1ogica1activity.Itusua11ycomesfromanima1andp1ant1ife.Butitcana1sobeformedbygeo1ogica1（地质的）processes,suchasinteractionsbetweenrocksandwater.NASAsaidtheincreasedmethanewasmeasuredtobeabout21partsperbi11ionbyvo1ume（ppbv）.

4、Oneppbvmeansthatifyoutakeavo1umeofaironMars,onebi11ionthofthevo1umeofairismethane.ItwasnotthefirsttimeCuriosityhasfoundmethanegasintheMartianatmosphere.Aboutayearago,NASAannouncedthatCuriosityhaddiscoveredsharpseasona1increasesinthegas.Thistime,NASAsaidthemeasuredmethanegas1eve1wasc1ear1y1argerthana

5、nyothersobservedinthepast.NASAofficia1seventemporari1ystoppedCuriosity,sotheractivitiestoinvestigatefurther.Itsexcitingbecausemicrobia1（微生物的）1ifeisanimportantsourceofmethaneonEarthJNASAsaidinastatementannouncingthediscovery.However,Curiosity,steamcarriedoutafo11ow-upmethaneexperimentthatshowedasharp

6、dropin1eve1softhegas.Thesecondexaminationfoundthe1eve1was1essthanonepartperbi11ionbyvo1ume.Thatnumberwasc1osetothebackground1eve1sCuriosityseesa11thetime.Theriseandfa11ofthemethanegas1eve1s1eftNASAscientistswithmorequestionsthananswers.Thescientistsarecontinuingtostudypossib1ecausesforthesuddenincre

7、ase.Themethanemysterycontinues.Curiositydoesnothaveinstrumentsthatcanexact1yidentifywhetherthesourceofthemethaneisbio1ogica1orgeo1ogica1.One1eadingtheoryisthatmethaneisbeingre1easedfromundergroundareascreatedbypossib1e1ifeformsthatdisappeared1ongago.EventhoughMarshasnoactivevo1canoes,scientistsbe1ie

8、veitisa1sopossib1ethatmethaneisbeingproducedbyreactionsinvo1vingcarbonmateria1sandwater.Ac1earerunderstandingofmethane1eve1sovertimecou1dhe1pscientistsdeterminewherethey,re1ocatedonMars.Scientistshopethisunderstandingwi11comeasCuriositycontinuestoco11ectmethanedatainitssearchforpossib1e1ife.1. Curio

9、sitydiscovered.A.the1argestmethanegas1eve1everonMarsB.theexistenceof1ifeonMarsC.thereasonfortheincreasedmethaneD.interactionsbetweenrocksandwater2. WhydidNASAofficia1soncestopCuriosity,sotheractivities?A. Toseekpossib1e1ifeexistingonMars.B. Tocheckthequa1ityofCuriosity,smission.C. Tofindseasona1incr

10、easesinthemethanegas.D. Tofurtherexaminethemethanegas1eve1onMars.3. Whatcanwe1earnfromthe1astthreeparagraphs?A. CausesforthechangeofmethanehavebeenprovedbyCuriosity.B. Curiosityhasprovedthe1ocationofmethanebyinstruments.C. Scientiststhinkundergroundmateria1s,reactionsmayproducemethane.D. Identifying

11、thesourceofmethanehe1psscientistssearchforpossib1e1ifeonMars.4. Thepassageisprobab1ytakenfrom.A.ageographytextbookB.asciencenewspaperC.ahea1thmagazineD.atrave1brochure参考答案1-4ADCB生词及长难句1. NASA美国国家航空航天局2. Marsn.火星3. Curiosity,sMarsScience1aboratory“好奇号”火星科学实验室4. Thedevice,ca11eda1aserspectrometer,meas

12、ures1eve1sof,chemica1e1ementsandgasesintheMartianatmosphere.句子主干：Thedevicemeasures1eve1s.参考译文：该装置叫做激光光谱仪，可以测量火星大气中化学元素和气体的含量。5. 1aserspectrometer激光光谱仪6. Martianadj.火星的7. CO2：carbondioxide二氧化碳8. bio1ogica1。力生物的；与生命过程有关的；生物学的Depressionisbothbio1ogica1andpsycho1ogica1.抑郁症与生理和心理都有关系。9. geo1ogica1adj.地质的

13、Vo1canoeruptionisoneofseriousgeo1ogica1disasters.火山喷发是严重的地质灾害之-bO10. interaction/交互作用,相互作用Priceisdeterminedthroughtheinteractionofdemandandsupp1y.价格是通过供需关系决定的。知识背景1. NASA美国国家航空航天局(Nationa1AeronauticsandSpaceAdministration,简称NASA),又称美国宇航局、美国太空总署，是美国联邦政府的一个行政性科研机构，负责制定、实施美国的太空计划，并开展航空科学暨太空科学的研究。2. Mar

14、s火星，太阳系八大行星之一，是距离太阳由近到远的第四颗行星，属于类地行星。直径约为地球的53%,质量为地球的14%,与地球最近距离约为5500万公里，最远距离则超过4亿公里。其自转轴倾角、自转周期均与地球相近，公转一周约为地球公转时间的两倍。3. MarsScience1aboratory火星科学实验室（MarsScience1aboratory,简称MS1）,又名“好奇号”火星车。于2011年11月25日在卡纳维拉尔角空军基地发射。它是美国国家航空航天局2009年火星探测计划的一个组成部分，其大小是火星探测漫游者勇气号和机遇号的两倍，重量是其三倍。火星科学实验室将会采集火星土壤样本和岩芯，然后对它们可能支持现在或过去微生物存在的有机化合物和环境条件进行分析。