MOOC 大学英语(二)-河北科技大学 中国大学慕课答案

MOOC大学英语(二)-河北科技大学中国大学慕课答案随堂测验1、填空题：Schoolsandeducatorsareexpectedtofacilitatestudents’whole-persondevelopmentandpreparethemfor__________.正确答案:【lifelonglearning】2、填空题：ForConfucius,thegoalofeducationistobecomefullhumanbeingswholearnandpursuetheConfucian__________（核心价值观）,cultivatethem,andpracticethemintheday-to-daylives.正确答案:【corevalues】3、填空题：IntheUNESCOreport,“__________”impliesobtainingthebasicknowledgeandthecapabilityonlifelonglearning.正确答案:【Learningtoknow】4、填空题：Wewillimprove__________（继续教育）,stepupeffortstobuildalearningsociety,andpromotethewell-roundeddevelopmentofallourpeople.正确答案:【continuingeducation】5、填空题：Weshouldbegoodatlearning.WewillfosterastrongatmosphereoflearningandpracticingintheParty,andbuildourPartyintoa__________（马克思主义学习政党）.Wewillnurturealoveoflearninginourpeople.正确答案:【Marxistlearningparty】随堂测验1、填空题：The_________systemincreasedthepayrolltax,butonlymodestlyatfirst.正确答案:【1.medicare】2、填空题：Theskyoverthecitywasoverspreadwithaheavy________.正确答案:【smog】3、填空题：Severalhundredpeople_________aroundtheballroomdancefloor.正确答案:【twirl】4、填空题：Fromtheexamplesabove,the______isrevealingweatherpatternswehaveneverseenbefore.正确答案:【lidar】5、填空题：Iheardthatanew_________iscomingatthenextseason.正确答案:【sitcom】随堂测验1、问题：Readthefollowingpassageandgivethebestanswertoeachquestionwiththeinformationyouhavegotfromthepassage.Communicationtechnologiesarefarfromequalwhenitcomestoconveyingthetruth.Thefirststudytocomparehonestyacrossarangeofcommunicationsmediahasfoundthatpeoplearetwiceaslikelytotellliesinphoneconversationsastheyareinemails.Thefactthatemailsareautomaticallyrecorded–andcancomebacktohauntyou–appearstobethekeytothefinding.JeffHancockofCornellUniversityinIthaca,NewYork,asked30studentstokeepacommunicationsdiaryforaweek.Inittheynotedthenumberofconversationsoremailexchangestheyhadlastingmorethan10minutes,andconfessedtohowmanyliestheytold.Hancockthenworkedoutthenumberofliesperconversationforeachmedium.Hefoundthatliesmadeup14percentofemails,21percentofinstantmessages,27percentofface-to-faceinteractionsandanastonishing37percentofphonecalls.Hisresults,tobepresentedattheconferenceonhuman-computerinteractioninVienna,Austria,inApril,havesurprisedpsychologists.Someexpectedemailerstobethebiggestliars,reasoningthatbecausedeceptionmakespeopleuncomfortable,thedetachmentofemailingwouldmakeiteasiertolie.Othersexpectedpeopletoliemoreinface-to-faceexchangesbecausewearemostpractisedattheformofcommunication.ButHancocksaysitisalsocrucialwhetheraconversationisbeingrecordedandcouldbereread,andwhetheritoccursinrealtime.Peopleappeartobeafraidtoliewhentheyknowthecommunicationcouldlaterbeusedtoholdthemtoaccount,hesays.Thisiswhyfewerliesappearinemailthanonthephone.Peoplearealsomorelikelytolieinrealtime–inaninstantmessageorphonecall,say–thaniftheyhavetimetothinkofaresponse,saysHancock.Hefoundmanyliesarespontaneousresponsestoanunexpecteddemand,suchas:“Doyoulikemydress?”Hancockhopeshisresearchwillhelpcompaniesworkoutthebestwaysfortheiremployeestocommunicate.Forinstance,thephonemightbethebestmediumforsaleswhereemployeesareencouragedtostretchthetruth.Butgivenhisresults,workassessment,wherehonestisapriority,mightbebestdoneusingemail.Hancock’sstudyfocuseson________.选项：A、theconsequencesoflyinginvariouscommunicationsmediaB、thesuccessofcommunicationstechnologiesinconveyingideaC、people’spreferencesinselectingcommunicationstechnologiesD、people’shonestylevelsacrossarangeofcommunicationsmedia正确答案:【people’shonestylevelsacrossarangeofcommunicationsmedia】2、问题：Readthefollowingpassageandgivethebestanswertoeachquestionwiththeinformationyouhavegotfromthepassage.Communicationtechnologiesarefarfromequalwhenitcomestoconveyingthetruth.Thefirststudytocomparehonestyacrossarangeofcommunicationsmediahasfoundthatpeoplearetwiceaslikelytotellliesinphoneconversationsastheyareinemails.Thefactthatemailsareautomaticallyrecorded–andcancomebacktohauntyou–appearstobethekeytothefinding.JeffHancockofCornellUniversityinIthaca,NewYork,asked30studentstokeepacommunicationsdiaryforaweek.Inittheynotedthenumberofconversationsoremailexchangestheyhadlastingmorethan10minutes,andconfessedtohowmanyliestheytold.Hancockthenworkedoutthenumberofliesperconversationforeachmedium.Hefoundthatliesmadeup14percentofemails,21percentofinstantmessages,27percentofface-to-faceinteractionsandanastonishing37percentofphonecalls.Hisresults,tobepresentedattheconferenceonhuman-computerinteractioninVienna,Austria,inApril,havesurprisedpsychologists.Someexpectedemailerstobethebiggestliars,reasoningthatbecausedeceptionmakespeopleuncomfortable,thedetachmentofemailingwouldmakeiteasiertolie.Othersexpectedpeopletoliemoreinface-to-faceexchangesbecausewearemostpractisedattheformofcommunication.ButHancocksaysitisalsocrucialwhetheraconversationisbeingrecordedandcouldbereread,andwhetheritoccursinrealtime.Peopleappeartobeafraidtoliewhentheyknowthecommunicationcouldlaterbeusedtoholdthemtoaccount,hesays.Thisiswhyfewerliesappearinemailthanonthephone.Peoplearealsomorelikelytolieinrealtime–inaninstantmessageorphonecall,say–thaniftheyhavetimetothinkofaresponse,saysHancock.Hefoundmanyliesarespontaneousresponsestoanunexpecteddemand,suchas:“Doyoulikemydress?”Hancockhopeshisresearchwillhelpcompaniesworkoutthebestwaysfortheiremployeestocommunicate.Forinstance,thephonemightbethebestmediumforsaleswhereemployeesareencouragedtostretchthetruth.Butgivenhisresults,workassessment,wherehonestisapriority,mightbebestdoneusingemail.Hancock’sresearchfindingsurprisedthosewhobelievedthat________.选项：A、peoplearelesslikelytolieininstantmessagesB、peopleareunlikelytolieinface-to-faceinteractionsC、peoplearemostlikelytolieinemailcommunicationD、peoplearetwiceaslikelytolieinphoneconversations正确答案:【peoplearemostlikelytolieinemailcommunication】3、问题：Readthefollowingpassageandgivethebestanswertoeachquestionwiththeinformationyouhavegotfromthepassage.Communicationtechnologiesarefarfromequalwhenitcomestoconveyingthetruth.Thefirststudytocomparehonestyacrossarangeofcommunicationsmediahasfoundthatpeoplearetwiceaslikelytotellliesinphoneconversationsastheyareinemails.Thefactthatemailsareautomaticallyrecorded–andcancomebacktohauntyou–appearstobethekeytothefinding.JeffHancockofCornellUniversityinIthaca,NewYork,asked30studentstokeepacommunicationsdiaryforaweek.Inittheynotedthenumberofconversationsoremailexchangestheyhadlastingmorethan10minutes,andconfessedtohowmanyliestheytold.Hancockthenworkedoutthenumberofliesperconversationforeachmedium.Hefoundthatliesmadeup14percentofemails,21percentofinstantmessages,27percentofface-to-faceinteractionsandanastonishing37percentofphonecalls.Hisresults,tobepresentedattheconferenceonhuman-computerinteractioninVienna,Austria,inApril,havesurprisedpsychologists.Someexpectedemailerstobethebiggestliars,reasoningthatbecausedeceptionmakespeopleuncomfortable,thedetachmentofemailingwouldmakeiteasiertolie.Othersexpectedpeopletoliemoreinface-to-faceexchangesbecausewearemostpractisedattheformofcommunication.ButHancocksaysitisalsocrucialwhetheraconversationisbeingrecordedandcouldbereread,andwhetheritoccursinrealtime.Peopleappeartobeafraidtoliewhentheyknowthecommunicationcouldlaterbeusedtoholdthemtoaccount,hesays.Thisiswhyfewerliesappearinemailthanonthephone.Peoplearealsomorelikelytolieinrealtime–inaninstantmessageorphonecall,say–thaniftheyhavetimetothinkofaresponse,saysHancock.Hefoundmanyliesarespontaneousresponsestoanunexpecteddemand,suchas:“Doyoulikemydress?”Hancockhopeshisresearchwillhelpcompaniesworkoutthebestwaysfortheiremployeestocommunicate.Forinstance,thephonemightbethebestmediumforsaleswhereemployeesareencouragedtostretchthetruth.Butgivenhisresults,workassessment,wherehonestisapriority,mightbebestdoneusingemail.Accordingtothepassage,whyarepeoplemorelikelytotellthetruththroughcertainmediaofcommunication?选项：A、TheyareafraidofleavingbehindtracesoftheirliesB、TheybelievethathonestyisthebestpolicyC、TheytendtoberelaxedwhenusingthosemediaD、Theyaremostpracticedatthoseformsofcommunication正确答案:【Theyareafraidofleavingbehindtracesoftheirlies】4、问题：Readthefollowingpassageandgivethebestanswertoeachquestionwiththeinformationyouhavegotfromthepassage.Communicationtechnologiesarefarfromequalwhenitcomestoconveyingthetruth.Thefirststudytocomparehonestyacrossarangeofcommunicationsmediahasfoundthatpeoplearetwiceaslikelytotellliesinphoneconversationsastheyareinemails.Thefactthatemailsareautomaticallyrecorded–andcancomebacktohauntyou–appearstobethekeytothefinding.JeffHancockofCornellUniversityinIthaca,NewYork,asked30studentstokeepacommunicationsdiaryforaweek.Inittheynotedthenumberofconversationsoremailexchangestheyhadlastingmorethan10minutes,andconfessedtohowmanyliestheytold.Hancockthenworkedoutthenumberofliesperconversationforeachmedium.Hefoundthatliesmadeup14percentofemails,21percentofinstantmessages,27percentofface-to-faceinteractionsandanastonishing37percentofphonecalls.Hisresults,tobepresentedattheconferenceonhuman-computerinteractioninVienna,Austria,inApril,havesurprisedpsychologists.Someexpectedemailerstobethebiggestliars,reasoningthatbecausedeceptionmakespeopleuncomfortable,thedetachmentofemailingwouldmakeiteasiertolie.Othersexpectedpeopletoliemoreinface-to-faceexchangesbecausewearemostpractisedattheformofcommunication.ButHancocksaysitisalsocrucialwhetheraconversationisbeingrecordedandcouldbereread,andwhetheritoccursinrealtime.Peopleappeartobeafraidtoliewhentheyknowthecommunicationcouldlaterbeusedtoholdthemtoaccount,hesays.Thisiswhyfewerliesappearinemailthanonthephone.Peoplearealsomorelikelytolieinrealtime–inaninstantmessageorphonecall,say–thaniftheyhavetimetothinkofaresponse,saysHancock.Hefoundmanyliesarespontaneousresponsestoanunexpecteddemand,suchas:“Doyoulikemydress?”Hancockhopeshisresearchwillhelpcompaniesworkoutthebestwaysfortheiremployeestocommunicate.Forinstance,thephonemightbethebestmediumforsaleswhereemployeesareencouragedtostretchthetruth.Butgivenhisresults,workassessment,wherehonestisapriority,mightbebestdoneusingemail.AccordingtoHancock,thetelephoneisapreferablemediumforpromotingsalesbecause________.选项：A、salesmencantalkdirectlytotheircustomersB、salesmenmayfeellessrestrainedtoexaggerateC、salesmencanimpresscustomersasbeingtrustworthyD、salesmenmaypassoninstantmessageseffectively正确答案:【salesmenmayfeellessrestrainedtoexaggerate】5、问题：Readthefollowingpassageandgivethebestanswertoeachquestionwiththeinformationyouhavegotfromthepassage.Communicationtechnologiesarefarfromequalwhenitcomestoconveyingthetruth.Thefirststudytocomparehonestyacrossarangeofcommunicationsmediahasfoundthatpeoplearetwiceaslikelytotellliesinphoneconversationsastheyareinemails.Thefactthatemailsareautomaticallyrecorded–andcancomebacktohauntyou–appearstobethekeytothefinding.JeffHancockofCornellUniversityinIthaca,NewYork,asked30studentstokeepacommunicationsdiaryforaweek.Inittheynotedthenumberofconversationsoremailexchangestheyhadlastingmorethan10minutes,andconfessedtohowmanyliestheytold.Hancockthenworkedoutthenumberofliesperconversationforeachmedium.Hefoundthatliesmadeup14percentofemails,21percentofinstantmessages,27percentofface-to-faceinteractionsandanastonishing37percentofphonecalls.Hisresults,tobepresentedattheconferenceonhuman-computerinteractioninVienna,Austria,inApril,havesurprisedpsychologists.Someexpectedemailerstobethebiggestliars,reasoningthatbecausedeceptionmakespeopleuncomfortable,thedetachmentofemailingwouldmakeiteasiertolie.Othersexpectedpeopletoliemoreinface-to-faceexchangesbecausewearemostpractisedattheformofcommunication.ButHancocksaysitisalsocrucialwhetheraconversationisbeingrecordedandcouldbereread,andwhetheritoccursinrealtime.Peopleappeartobeafraidtoliewhentheyknowthecommunicationcouldlaterbeusedtoholdthemtoaccount,hesays.Thisiswhyfewerliesappearinemailthanonthephone.Peoplearealsomorelikelytolieinrealtime–inaninstantmessageorphonecall,say–thaniftheyhavetimetothinkofaresponse,saysHancock.Hefoundmanyliesarespontaneousresponsestoanunexpecteddemand,suchas:“Doyoulikemydress?”Hancockhopeshisresearchwillhelpcompaniesworkoutthebestwaysfortheiremployeestocommunicate.Forinstance,thephonemightbethebestmediumforsaleswhereemployeesareencouragedtostretchthetruth.Butgivenhisresults,workassessment,wherehonestisapriority,mightbebestdoneusingemail.Itcanbeinferredfromthepassagethat________.选项：A、honestyshouldbeencouragedininterpersonalcommunicationsB、moreemployerswilluseemailstocommunicatewiththeiremployeesC、suitablemediashouldbechosenfordifferentcommunicationpurposesD、emailisnowthedominantmediumofcommunicationwithinacompany正确答案:【suitablemediashouldbechosenfordifferentcommunicationpurposes】随堂测验1、填空题：Intheuniversity,the__________encompassliterature,classics,ancientandmodernlanguages,history,philosophy,mediastudies,thefineandperformingarts,andotherrelatedsubjects.正确答案:【humanities】2、填空题：InancientChineseculture,topromoteall-arounddevelopment,studentswererequiredtomastersixpracticaldisciplinescalled__________.正确答案:【theSixArts】3、填空题：“Amanofvirtueisnota__________”,indicatingthataprofessionalandtechnicalpersoncannotbesimplycalled“Junzi”.正确答案:【device】4、填空题：Tostudyhumanitiesgivesusanindependentpersonalityanda__________(生命的乐趣）towardstheworld.正确答案:【deepervision】5、填空题：Humanitieseducationcancertainlyprovidestrongsupportforyoungtalentstofindthe__________andthegoalsoffuturestruggle.正确答案:【interestsoflife】随堂测验1、填空题：Healthexpertsadvisepeoplewhohavebeenphysicallyinactivetohaveacompletephysical_________beforebeginninganewexerciseprogram.正确答案:【exam】2、填空题：Thenonprofitgrouphadbeendevelopingdigitalscienceand_________booksforabouttwoyears.正确答案:【math】3、填空题：“Wehavemorethan100machinesinthetest_________,”saystheassistantinawhiteoverall.正确答案:【lab】4、填空题：Allfirst-yearundergraduatesinthisuniversityhavetoliveina_________.正确答案:【dorm】5、填空题：This_________ishighlypoisonous.正确答案:【gas】随堂测验1、问题：Readthefollowingpassageandgivethebestanswertoeachquestionwiththeinformationyouhavegotfromthepassage.Californiahasbeenfacingadroughtformanyyearsnow,withcertainareasevenhavingtopumpfreshwaterhundredsofmilestotheirdistributionsystem.Theproblemisgrowingasthepopulationofthestatecontinuestoexpand.Newresearchhasfounddeepwaterreservesunderthestatewhichcouldhelpsolvetheirdroughtcrisis.Previousdrillingofwellscouldonlyreachdepthsof1,000feet,butduetonewpumpingpractices,waterdeeperthanthiscannowbeextracted(抽取).TheteamatStanfordinvestigatedtheaquifers(地下蓄水层)belowthisdepthandfoundthatreservesmaybetriplewhatwaspreviouslythought.Itisprofitabletodrilltodepthsmorethan1,000feetforoilandgasextraction,butonlyrecentlyinCaliforniahasitbecomeprofitabletopumpwaterfromthisdepth.Theaquifersrangefrom1,000to3,000feetbelowtheground,whichmeansthatpumpingwillbeexpensiveandthereareotherconcerns.Thebiggestconcernofpumpingoutwaterfromthisdeepinthegradualsettlingdownofthelandsurface.Asthewaterispumpedout,thevacantspaceleftiscompactedbytheweightoftheearthabove.Eventhoughpumpingfromthesedepthsisexpensive,itisstillcheaperthandesalinating(脱盐)theoceanwaterinthelargelycoastalstate.Somedesalinationplantsexistwherefeasible,buttheyarecostlytorunandcanneedconstantrepairs.Wellsaremuchmorereliablesourcesoffreshwater,andCaliforniaishopingthatthesedeepwellsmaybetheanswertotheirseverewatershortage.Oneproblemwiththesesourcesisthatthedeepwateralsohasahigherlevelofsaltthanshalloweraquifers.Thismeansthatsomewellsmayevenneedtoundergodesalinationafterextraction,thusincreasingthecost.Researchfromtheexhaustivestudyofgroundwaterfromover950drillinglogshasjustbeenpublished.Newestimatesofthewaterreservesnowgoupto2,700billioncubicmetersoffreshwater.HowcouldCalifornia’sdroughtcrisisbesolvedaccordingtosomeresearchers?选项：A、Bybuildingmorereservesofgroundwater.B、Bydrawingwaterfromthedepthsoftheearth.C、Bydevelopingmoreadvanceddrillingdevices.D、Byupgradingitswaterdistributionsystem.正确答案:【Bydrawingwaterfromthedepthsoftheearth.】2、问题：Readthefollowingpassageandgivethebestanswertoeachquestionwiththeinformationyouhavegotfromthepassage.Californiahasbeenfacingadroughtformanyyearsnow,withcertainareasevenhavingtopumpfreshwaterhundredsofmilestotheirdistributionsystem.Theproblemisgrowingasthepopulationofthestatecontinuestoexpand.Newresearchhasfounddeepwaterreservesunderthestatewhichcouldhelpsolvetheirdroughtcrisis.Previousdrillingofwellscouldonlyreachdepthsof1,000feet,butduetonewpumpingpractices,waterdeeperthanthiscannowbeextracted(抽取).TheteamatStanfordinvestigatedtheaquifers(地下蓄水层)belowthisdepthandfoundthatreservesmaybetriplewhatwaspreviouslythought.Itisprofitabletodrilltodepthsmorethan1,000feetforoilandgasextraction,butonlyrecentlyinCaliforniahasitbecomeprofitabletopumpwaterfromthisdepth.Theaquifersrangefrom1,000to3,000feetbelowtheground,whichmeansthatpumpingwillbeexpensiveandthereareotherconcerns.Thebiggestconcernofpumpingoutwaterfromthisdeepinthegradualsettlingdownofthelandsurface.Asthewaterispumpedout,thevacantspaceleftiscompactedbytheweightoftheearthabove.Eventhoughpumpingfromthesedepthsisexpensive,itisstillcheaperthandesalinating(脱盐)theoceanwaterinthelargelycoastalstate.Somedesalinationplantsexistwherefeasible,buttheyarecostlytorunandcanneedconstantrepairs.Wellsaremuchmorereliablesourcesoffreshwater,andCaliforniaishopingthatthesedeepwellsmaybetheanswertotheirseverewatershortage.Oneproblemwiththesesourcesisthatthedeepwateralsohasahigherlevelofsaltthanshalloweraquifers.Thismeansthatsomewellsmayevenneedtoundergodesalinationafterextraction,thusincreasingthecost.Researchfromtheexhaustivestudyofgroundwaterfromover950drillinglogshasjustbeenpublished.Newestimatesofthewaterreservesnowgoupto2,700billioncubicmetersoffreshwater.Whatcanbeinferredaboutextractingwaterfromdeepaquifers?选项：A、Itwasdeemedvitaltosolvingthewaterproblem.B、Itwasnotconsideredworththeexpense.C、Itmaynotprovidequalityfreshwater.D、Itisboundtogainsupportfromthelocalpeople.正确答案:【Itwasnotconsideredworththeexpense.】3、问题：Readthefollowingpassageandgivethebestanswertoeachquestionwiththeinformationyouhavegotfromthepassage.Californiahasbeenfacingadroughtformanyyearsnow,withcertainareasevenhavingtopumpfreshwaterhundredsofmilestotheirdistributionsystem.Theproblemisgrowingasthepopulationofthestatecontinuestoexpand.Newresearchhasfounddeepwaterreservesunderthestatewhichcouldhelpsolvetheirdroughtcrisis.Previousdrillingofwellscouldonlyreachdepthsof1,000feet,butduetonewpumpingpractices,waterdeeperthanthiscannowbeextracted(抽取).TheteamatStanfordinvestigatedtheaquifers(地下蓄水层)belowthisdepthandfoundthatreservesmaybetriplewhatwaspreviouslythought.Itisprofitabletodrilltodepthsmorethan1,000feetforoilandgasextraction,butonlyrecentlyinCaliforniahasitbecomeprofitabletopumpwaterfromthisdepth.Theaquifersrangefrom1,000to3,000feetbelowtheground,whichmeansthatpumpingwillbeexpensiveandthereareotherconcerns.Thebiggestconcernofpumpingoutwaterfromthisdeepinthegradualsettlingdownofthelandsurface.Asthewaterispumpedout,thevacantspaceleftiscompactedbytheweightoftheearthabove.Eventhoughpumpingfromthesedepthsisexpensive,itisstillcheaperthandesalinating(脱盐)theoceanwaterinthelargelycoastalstate.Somedesalinationplantsexistwherefeasible,buttheyarecostlytorunandcanneedconstantrepairs.Wellsaremuchmorereliablesourcesoffreshwater,andCaliforniaishopingthatthesedeepwellsmaybetheanswertotheirseverewatershortage.Oneproblemwiththesesourcesisthatthedeepwateralsohasahigherlevelofsaltthanshalloweraquifers.Thismeansthatsomewellsmayevenneedtoundergodesalinationafterextraction,thusincreasingthecost.Researchfromtheexhaustivestudyofgroundwaterfromover950drillinglogshasjustbeenpublished.Newestimatesofthewaterreservesnowgoupto2,700billioncubicmetersoffreshwater.Whatismentionedasaconsequenceofextractingwaterfromdeepunderground?选项：A、Thesinkingoflandsurface.B、Theharmtotheecosystem.C、Thedamagetoaquifers.D、Thechangeoftheclimate.正确答案:【Thesinkingoflandsurface.】4、问题：Readthefollowingpassageandgivethebestanswertoeachquestionwiththeinformationyouhavegotfromthepassage.Californiahasbeenfacingadroughtformanyyearsnow,withcertainareasevenhavingtopumpfreshwaterhundredsofmilestotheirdistributionsystem.Theproblemisgrowingasthepopulationofthestatecontinuestoexpand.Newresearchhasfounddeepwaterreservesunderthestatewhichcouldhelpsolvetheirdroughtcrisis.Previousdrillingofwellscouldonlyreachdepthsof1,000feet,butduetonewpumpingpractices,waterdeeperthanthiscannowbeextracted(抽取).TheteamatStanfordinvestigatedtheaquifers(地下蓄水层)belowthisdepthandfoundthatreservesmaybetriplewhatwaspreviouslythought.Itisprofitabletodrilltodepthsmorethan1,000feetforoilandgasextraction,butonlyrecentlyinCaliforniahasitbecomeprofitabletopumpwaterfromthisdepth.Theaquifersrangefrom1,000to3,000feetbelowtheground,whichmeansthatpumpingwillbeexpensiveandthereareotherconcerns.Thebiggestconcernofpumpingoutwaterfromthisdeepinthegradualsettlingdownofthelandsurface.Asthewaterispumpedout,thevacantspaceleftiscompactedbytheweightoftheearthabove.Eventhoughpumpingfromthesedepthsisexpensive,itisstillcheaperthandesalinating(脱盐)theoceanwaterinthelargelycoastalstate.Somedesalinationplantsexistwherefeasible,buttheyarecostlytorunandcanneedconstantrepairs.Wellsaremuchmorereliablesourcesoffreshwater,andCaliforniaishopingthatthesedeepwellsmaybetheanswertotheirseverewatershortage.Oneproblemwiththesesourcesisthatthedeepwateralsohasahigherlevelofsaltthanshalloweraquifers.Thismeansthatsomewellsmayevenneedtoundergodesalinationafterextraction,thusincreasingthecost.Researchfromtheexhaustivestudyofgroundwaterfromover950drillinglogshasjustbeenpublished.Newestimatesofthewaterreservesnowgoupto2,700billioncubicmetersoffreshwater.Whatdoestheauthorsayaboutdeepwells?选项：A、Theyrunwithoutanyneedforrepairs.B、Theyareentirelyfreefrompollutants.C、Theyaretheultimatesolutiontodroughts.D、Theyprovideasteadysupplyoffreshwater.正确答案:【Theyprovideasteadysupplyoffreshwater.】5、问题：Readthefollowingpassageandgivethebestanswertoeachquestionwiththeinformationyouhavegotfromthepassage.Californiahasbeenfacingadroughtformanyyearsnow,withcertainareasevenhavingtopumpfreshwaterhundredsofmilestotheirdistributionsystem.Theproblemisgrowingasthepopulationofthestatecontinuestoexpand.Newresearchhasfounddeepwaterreservesunderthestatewhichcouldhelpsolvetheirdroughtcrisis.Previousdrillingofwellscouldonlyreachdepthsof1,000feet,butduetonewpumpingpractices,waterdeeperthanthiscannowbeextracted(抽取).TheteamatStanfordinvestigatedtheaquifers(地下蓄水层)belowthisdepthandfoundthatreservesmaybetriplewhatwaspreviouslythought.Itisprofitabletodrilltodepthsmorethan1,000feetforoilandgasextraction,butonlyrecentlyinCaliforniahasitbecomeprofitabletopumpwaterfromthisdepth.Theaquifersrangefrom1,000to3,000feetbelowtheground,whichmeansthatpumpingwillbeexpensiveandthereareotherconcerns.Thebiggestconcernofpumpingoutwaterfromthisdeepinthegradualsettlingdownofthelandsurface.Asthewaterispumpedout,thevacantspaceleftiscompactedbytheweightoftheearthabove.Eventhoughpumpingfromthesedepthsisexpensive,itisstillcheaperthandesalinating(脱盐)theoceanwaterinthelargelycoastalstate.Somedesalinationplantsexistwherefeasible,buttheyarecostlytorunandcanneedconstantrepairs.Wellsaremuchmorereliablesourcesoffreshwater,andCaliforniaishopingthatthesedeepwellsmaybetheanswertotheirseverewatershortage.Oneproblemwiththesesourcesisthatthedeepwateralsohasahigherlevelofsaltthanshalloweraquifers.Thismeansth