[判断题]AnaccidentthatoccurredintheskiesovertheGrandCanyonin1956resultedintheestablishmentoftheFederalAviationAdministration(FAA)toregulateandoverseetheoperationofaircraftintheskiesovertheUnitedStates,whichwerebecomingquitecongested.TheresultingstructureofairtrafficcontrolhasgreatlyincreasedthesafetyofflightintheUnitedStates,andsimilarairtrafficcontrolproceduresarealsoinplaceovermuchoftherestoftheworld.Rudimentaryairtrafficcontrol(ATC)existedwellbeforetheGrandCanyondisaster.Asearlyasthe1920s,theearliestairtrafficcontrollersmanuallyguidedaircraftinthevicinityoftheairports,usinglightsandflags,whilebeaconsandflashinglightswereplacedalongcross-countryroutestoestablishtheearliestairways.However,thispurelyvisualsystemwasuselessinbadweather,and,bythe1930s,radiocommunicationwascomingintouseforATC.Thefirstregiontohavesomethingapproximatingtoday'sATCwasNewYorkCity,withothermajormetropolitanareasfollowingsoonafter.Inthe1940s,ATCcentrescouldanddidtakeadvantageofthenewlydevelopedradarandimprovedradiocommunicationbroughtaboutbytheSecondWorldWar,butthesystemremainedrudimentary.ItwasonlyafterthecreationoftheFAAthatfull-scaleregulationofAmerica'sairspacetookplace,andthiswasfortuitous,fortheadventofthejetenginesuddenlyresultedinalargenumberofveryfastplanes,reducingpilots'marginoferrorandpracticallydemandingsomesetofrulestokeepeveryonewellseparatedandoperatingsafelyintheair.ManypeoplethinkthatATCconsistsofarowofcontrollerssittinginfrontoftheirradarscreensatthenation'sairports,tellingarrivinganddepartingtrafficwhattodo.Thisisaveryincompletepartofthepicture.TheFAArealisedthattheairspaceovertheUnitedStateswouldatanytimehavemanydifferentkindsofplanes,flyingformanydifferentpurposes,inavarietyofweatherconditions,andthesamekindofstructurewasneededtoaccommodateallofthem.Tomeetthischallenge,thefollowingelementswereputintoeffect.First,ATCextendsovervirtuallytheentireUnitedStates.Ingeneral,from365mabovethegroundandhigher,theentirecountryisblanketedbycontrolledairspace.Incertainareas,mainlynearairports,controlledairspaceextendsdownto215mabovetheground,and,intheimmediatevicinityofanairport,allthewaydowntothesurface.ControlledairspaceisthatairspaceinwhichFAAregulationsapply.Elsewhere,inuncontrolledairspace,pilotsareboundbyfewerregulations.Inthisway,therecreationalpilotwhosimplywishestogoflyingforawhilewithoutalltherestrictionsimposedbytheFAAhasonlytostayinuncontrolledairspace,below365m,whilethepilotwhodoeswanttheprotectionaffordedbyATCcaneasilyenterthecontrolledairspace.TheFAAthenrecognisedtwotypesofoperatingenvironments.Ingoodmeteorologicalconditions,flyingwouldbepermittedunderVisualFlightRules(VFR,视觉飞行规则),whichsuggestsastrongrelianceonvisualcuestomaintainanacceptablelevelofsafety.PoorvisibilitynecessitatedasetofInstrumentalFlightRules(IFR,仪表飞行规则),underwhichthepilotreliedonaltitudeandnavigationalinformationprovidedbytheplane'sinstrumentpaneltoflysafely.Onaclearday,apilotincontrolledairspacecanchooseaVFRorIFRflightplan,andtheFAAregulationsweredevisedinawaywhichaccommodatesbothVFRandIFRoperationsinthesameairspace.However,apilotcanonlychoosetoflyIFRiftheypossessaninstrumentratingwhichisaboveandbeyondthebasicpilot'slicensethatmustalsobeheld.onaltitudeandnavigationalinformationprovidedbytheplane'sinstrumentpaneltoflysafely.Onaclearday,apilotincontrolledairspacecanchooseaVFRorIFRflightplan,andtheFAAregulationsweredevisedinawaywhichaccommodatesbothVFRandIFRoperationsinthesameairspace.However,apilotcanonlychoosetoflyIFRiftheypossessaninstrumentratingwhichisaboveandbeyondthebasicpilot'slicensethatmustalsobeheld.Controlledairspaceisdividedintoseveraldifferenttypes,designatedbylettersofthealphabet.UncontrolledairspaceisdesignatedClassF,whilecontrolledairspacebelow5,490mabovesealevelandnotinthevicinityofanairportisClassE.Allairspaceabove5,490misdesignatedClassA.ThereasonforthedivisionofClassEandClassAairspacestemsfromthetypeofplanesoperatinginthem.Generally,ClassEairspaceiswhereonefindsgeneralaviationaircraft(fewofwhichcanclimbabove5,490manyway),andcommercialturbopropaircraft.Above5,490mistherealmoftheheavyjets,sincejetenginesoperatemoreefficientlyathigheraltitudes.ThedifferencebetweenClassEandAairspaceisthatinClassA,alloperationsareIFR,andpilotsmustbeinstrument-rated,thatis,skilledandlicensedinaircraftinstrumentation.ThisisbecauseATCcontroloftheentirespaceisessential.Threeothertypesofairspace,ClassesD,CandB,governthevicinityofairports.Thesecorrespondroughlytosmallmunicipal,medium-sizedmetropolitanandmajormetropolitanairportsrespectively,andencompassanincreasinglyrigoroussetofregulations.Forexample,allaVFRpilothastodotoenterClassCairspaceisestablishtwo-wayradiocontactwithATC.NoexplicitpermissionfromATCtoenterisneeded,althoughthepilotmustcontinuetoobeyallregulationsgoverningVFRflight.ToenterClassBairspace,suchasonapproachtoamajormetropolitanairport,anexplicitATCclearance(飞机起降的许可)isrequired.Theprivatepilotwhocruiseswithoutpermissionintothisairspaceriskslosingtheirlicense.22.ApilotenteringClassCairspaceisflyingoveranaverage-sizedcity.
[单选题]PassagetwoExerciseisoneofthefewfactorswithapositiveroleinlong-termmaintenanceofbodyweight.Unfortunately,thatmessagehasnotgottenthroughtotheaverageAmerican,whowouldrathertryswitchingto“light”beerandlow-caloriebreadthanincreasephysicalexertion.TheCentersforDiseaseControl,forexample,foundthatfewerthanone-fourthofoverweightadultswhoweretryingtoshedpoundssaidtheywerecombiningexercisewiththeirdiet.Inrejectingexercise,somepeoplemaybediscouragedtoomuchbycaloric-expenditurecharts:forexample,onewouldhavetobrisklywalkthreemilesjusttoworkoffthe275caloriesinonedeliciousDanishpastry.Evenexerciseprofessionalsconcedehalfapointhere.“Exercisebyitselfisaverytoughwaytoloseweight,”saysYorkOnnen,programdirectorofthePresident’sCouncilonPhysicalFitnessandSports.Still,exercise’ssupportingroleinweightreductionisvital.AstudyattheBostonUniversityMedicalCenterofoverweightpoliceofficersandotherpublicemployeesconfirmedthatthosewhodietedwithoutexerciseregainedalmostalltheiroldweight,whilethosewhoworkedexerciseintotheirdailyroutinemaintainedtheirnewweight.Ifyouhavebeensedentaryanddecidetostartwalkingonemileaday,theaddedexercisecouldburnanextra100caloriesdaily.Inayear’stime,assumingnoincreaseinfoodintake,youcouldlosetenpounds.Byincreasingthedistanceofyourwalksgraduallyandmakingotherdietaryadjustments,youmayloseevenmoreweight. 6.WhatissaidabouttheaverageAmericaninthepassage?
[单选题]Exerciseisoneofthefewfactorswithapositiveroleinlong-termmaintenanceofbodyweight.Unfortunately,thatmessagehasnotgottenthroughtotheaverageAmerican,whowouldrathertryswitchingto“light”beerandlow-caloriebreadthanincreasephysicalexertion.TheCentersforDiseaseControl,forexample,foundthatfewerthanone-fourthofoverweightadultswhoweretryingtoshedpoundssaidtheywerecombiningexercisewiththeirdiet.Inrejectingexercise,somepeoplemaybediscouragedtoomuchbycaloric-expenditurecharts:forexample,onewouldhavetobrisklywalkthreemilesjusttoworkoffthe275caloriesinonedeliciousDanishpastry.Evenexerciseprofessionalsconcedehalfapointhere.“Exercisebyitselfisaverytoughwaytoloseweight,”saysYorkOnnen,programdirectorofthePresident’sCouncilonPhysicalFitnessandSports.Still,exercise’ssupportingroleinweightreductionisvital.AstudyattheBostonUniversityMedicalCenterofoverweightpoliceofficersandotherpublicemployeesconfirmedthatthosewhodietedwithoutexerciseregainedalmostalltheiroldweight,whilethosewhoworkedexerciseintotheirdailyroutinemaintainedtheirnewweight.Ifyouhavebeensedentaryanddecidetostartwalkingonemileaday,theaddedexercisecouldburnanextra100caloriesdaily.Inayear’stime,assumingnoincreaseinfoodintake,youcouldlosetenpounds.Byincreasingthedistanceofyourwalksgraduallyandmakingotherdietaryadjustments,youmayloseevenmoreweight.7.Somepeopledislikeexercisebecause________.
[单选题]Exerciseisoneofthefewfactorswithapositiveroleinlong-termmaintenanceofbodyweight.Unfortunately,thatmessagehasnotgottenthroughtotheaverageAmerican,whowouldrathertryswitchingto“light”beerandlow-caloriebreadthanincreasephysicalexertion.TheCentersforDiseaseControl,forexample,foundthatfewerthanone-fourthofoverweightadultswhoweretryingtoshedpoundssaidtheywerecombiningexercisewiththeirdiet.Inrejectingexercise,somepeoplemaybediscouragedtoomuchbycaloric-expenditurecharts:forexample,onewouldhavetobrisklywalkthreemilesjusttoworkoffthe275caloriesinonedeliciousDanishpastry.Evenexerciseprofessionalsconcedehalfapointhere.“Exercisebyitselfisaverytoughwaytoloseweight,”saysYorkOnnen,programdirectorofthePresident’sCouncilonPhysicalFitnessandSports.Still,exercise’ssupportingroleinweightreductionisvital.AstudyattheBostonUniversityMedicalCenterofoverweightpoliceofficersandotherpublicemployeesconfirmedthatthosewhodietedwithoutexerciseregainedalmostalltheiroldweight,whilethosewhoworkedexerciseintotheirdailyroutinemaintainedtheirnewweight.Ifyouhavebeensedentaryanddecidetostartwalkingonemileaday,theaddedexercisecouldburnanextra100caloriesdaily.Inayear’stime,assumingnoincreaseinfoodintake,youcouldlosetenpounds.Byincreasingthedistanceofyourwalksgraduallyandmakingotherdietaryadjustments,youmayloseevenmoreweight.8.“Evenexerciseprofessionalsconcedehalfapointhere”(Line3,Para.2)means“They________”.
[单选题]Exerciseisoneofthefewfactorswithapositiveroleinlong-termmaintenanceofbodyweight.Unfortunately,thatmessagehasnotgottenthroughtotheaverageAmerican,whowouldrathertryswitchingto“light”beerandlow-caloriebreadthanincreasephysicalexertion.TheCentersforDiseaseControl,forexample,foundthatfewerthanone-fourthofoverweightadultswhoweretryingtoshedpoundssaidtheywerecombiningexercisewiththeirdiet.Inrejectingexercise,somepeoplemaybediscouragedtoomuchbycaloric-expenditurecharts:forexample,onewouldhavetobrisklywalkthreemilesjusttoworkoffthe275caloriesinonedeliciousDanishpastry.Evenexerciseprofessionalsconcedehalfapointhere.“Exercisebyitselfisaverytoughwaytoloseweight,”saysYorkOnnen,programdirectorofthePresident’sCouncilonPhysicalFitnessandSports.Still,exercise’ssupportingroleinweightreductionisvital.AstudyattheBostonUniversityMedicalCenterofoverweightpoliceofficersandotherpublicemployeesconfirmedthatthosewhodietedwithoutexerciseregainedalmostalltheiroldweight,whilethosewhoworkedexerciseintotheirdailyroutinemaintainedtheirnewweight.Ifyouhavebeensedentaryanddecidetostartwalkingonemileaday,theaddedexercisecouldburnanextra100caloriesdaily.Inayear’stime,assumingnoincreaseinfoodintake,youcouldlosetenpounds.Byincreasingthedistanceofyourwalksgraduallyandmakingotherdietaryadjustments,youmayloseevenmoreweight. 9.WhatwasconfirmedbytheBostonUniversityMedicalCenter’sstudy?
[单选题]Exerciseisoneofthefewfactorswithapositiveroleinlong-termmaintenanceofbodyweight.Unfortunately,thatmessagehasnotgottenthroughtotheaverageAmerican,whowouldrathertryswitchingto“light”beerandlow-caloriebreadthanincreasephysicalexertion.TheCentersforDiseaseControl,forexample,foundthatfewerthanone-fourthofoverweightadultswhoweretryingtoshedpoundssaidtheywerecombiningexercisewiththeirdiet.Inrejectingexercise,somepeoplemaybediscouragedtoomuchbycaloric-expenditurecharts:forexample,onewouldhavetobrisklywalkthreemilesjusttoworkoffthe275caloriesinonedeliciousDanishpastry.Evenexerciseprofessionalsconcedehalfapointhere.“Exercisebyitselfisaverytoughwaytoloseweight,”saysYorkOnnen,programdirectorofthePresident’sCouncilonPhysicalFitnessandSports.Still,exercise’ssupportingroleinweightreductionisvital.AstudyattheBostonUniversityMedicalCenterofoverweightpoliceofficersandotherpublicemployeesconfirmedthatthosewhodietedwithoutexerciseregainedalmostalltheiroldweight,whilethosewhoworkedexerciseintotheirdailyroutinemaintainedtheirnewweight.Ifyouhavebeensedentaryanddecidetostartwalkingonemileaday,theaddedexercisecouldburnanextra100caloriesdaily.Inayear’stime,assumingnoincreaseinfoodintake,youcouldlosetenpounds.Byincreasingthedistanceofyourwalksgraduallyandmakingotherdietaryadjustments,youmayloseevenmoreweight.10.Whatistheauthor’spurposeinwritingthisarticle?
[单选题]Passage2Youmayhaveheardthesaying“TheYangtzeRiverChina'smotherriver.”Itisalmost6400kilometerslong.Astheworld’sthird-longestriver,itcoversone-fifthoflandarea.TheYangtzeRiverEconomicZone(长江经济带)coverselevenprovincesandcities,makingupaboutfortypercentofChina’stotalpopulationandGDP.OnDecember26,ChinapassedtheYangtzeRiverProtectionLaw,whichcameintoforceonMarch1,2021.ItisthefirstlawtoprotectawaterwayinChina.Themotherriverisingreatneedofprotectionbecausesomethingiswrongwithit.Forexample,becauseofoverfishingandwaterpollution,theriver’sChinesepaddlefishhasdiedoutthere.There’salsodesertifiedlandandsoilpollutionneartheriver.Accordingtothelaw,fishingwillnotbeallowedinalloftheYangtze'snaturalwaterways,includingitsmajortributaries(支流)andlakes.Thosewhoarecaughtfishingwillbefined(罚款)50000to500000yuan.Diggingsandwillbestrictlylimited(限制)intheriver.Manycompaniesarediggingsandalongtheriver.However,thishasledtolowerwaterlevelsontheriver,whichhascausedtheriver’swatertodecline.Companiesandfactoriesalongtheriverwillneedtofocusongreendevelopment.Iftheiractivitiesdoharmtothewaterways,theywillbemovedaway,thelawsays.6.WhatdoesthefirstparagraphtellusabouttheYangtzeRiver?
[单选题]Passage2Youmayhaveheardthesaying“TheYangtzeRiverChina'smotherriver.”Itisalmost6400kilometerslong.Astheworld’sthird-longestriver,itcoversone-fifthoflandarea.TheYangtzeRiverEconomicZone(长江经济带)coverselevenprovincesandcities,makingupaboutfortypercentofChina’stotalpopulationandGDP.OnDecember26,ChinapassedtheYangtzeRiverProtectionLaw,whichcameintoforceonMarch1,2021.ItisthefirstlawtoprotectawaterwayinChina.Themotherriverisingreatneedofprotectionbecausesomethingiswrongwithit.Forexample,becauseofoverfishingandwaterpollution,theriver’sChinesepaddlefishhasdiedoutthere.There’salsodesertifiedlandandsoilpollutionneartheriver.Accordingtothelaw,fishingwillnotbeallowedinalloftheYangtze'snaturalwaterways,includingitsmajortributaries(支流)andlakes.Thosewhoarecaughtfishingwillbefined(罚款)50000to500000yuan.Diggingsandwillbestrictlylimited(限制)intheriver.Manycompaniesarediggingsandalongtheriver.However,thishasledtolowerwaterlevelsontheriver,whichhascausedtheriver’swatertodecline.Companiesandfactoriesalongtheriverwillneedtofocusongreendevelopment.Iftheiractivitiesdoharmtothewaterways,theywillbemovedaway,thelawsays.7.WhatdoweknowabouttheYangtzeRiverProtectionLaw?
[单选题]Passage2Youmayhaveheardthesaying“TheYangtzeRiverChina'smotherriver.”Itisalmost6400kilometerslong.Astheworld’sthird-longestriver,itcoversone-fifthoflandarea.TheYangtzeRiverEconomicZone(长江经济带)coverselevenprovincesandcities,makingupaboutfortypercentofChina’stotalpopulationandGDP.OnDecember26,ChinapassedtheYangtzeRiverProtectionLaw,whichcameintoforceonMarch1,2021.ItisthefirstlawtoprotectawaterwayinChina.Themotherriverisingreatneedofprotectionbecausesomethingiswrongwithit.Forexample,becauseofoverfishingandwaterpollution,theriver’sChinesepaddlefishhasdiedoutthere.There’salsodesertifiedlandandsoilpollutionneartheriver.Accordingtothelaw,fishingwillnotbeallowedinalloftheYangtze'snaturalwaterways,includingitsmajortributaries(支流)andlakes.Thosewhoarecaughtfishingwillbefined(罚款)50000to500000yuan.Diggingsandwillbestrictlylimited(限制)intheriver.Manycompaniesarediggingsandalongtheriver.However,thishasledtolowerwaterlevelsontheriver,whichhascausedtheriver’swatertodecline.Companiesandfactoriesalongtheriverwillneedtofocusongreendevelopment.Iftheiractivitiesdoharmtothewaterways,theywillbemovedaway,thelawsays.8.WhatdoesParagraph3explain?
[单选题]Passage2Youmayhaveheardthesaying“TheYangtzeRiverChina'smotherriver.”Itisalmost6400kilometerslong.Astheworld’sthird-longestriver,itcoversone-fifthoflandarea.TheYangtzeRiverEconomicZone(长江经济带)coverselevenprovincesandcities,makingupaboutfortypercentofChina’stotalpopulationandGDP.OnDecember26,ChinapassedtheYangtzeRiverProtectionLaw,whichcameintoforceonMarch1,2021.ItisthefirstlawtoprotectawaterwayinChina.Themotherriverisingreatneedofprotectionbecausesomethingiswrongwithit.Forexample,becauseofoverfishingandwaterpollution,theriver’sChinesepaddlefishhasdiedoutthere.There’salsodesertifiedlandandsoilpollutionneartheriver.Accordingtothelaw,fishingwillnotbeallowedinalloftheYangtze'snaturalwaterways,includingitsmajortributaries(支流)andlakes.Thosewhoarecaughtfishingwillbefined(罚款)50000to500000yuan.Diggingsandwillbestrictlylimited(限制)intheriver.Manycompaniesarediggingsandalongtheriver.However,thishasledtolowerwaterlevelsontheriver,whichhascausedtheriver’swatertodecline.Companiesandfactoriesalongtheriverwillneedtofocusongreendevelopment.Iftheiractivitiesdoharmtothewaterways,theywillbemovedaway,thelawsays.9.Whatdoestheunderlinedword“decline”inParagraph5mean?
[单选题]Passage2Youmayhaveheardthesaying“TheYangtzeRiverChina'smotherriver.”Itisalmost6400kilometerslong.Astheworld’sthird-longestriver,itcoversone-fifthoflandarea.TheYangtzeRiverEconomicZone(长江经济带)coverselevenprovincesandcities,makingupaboutfortypercentofChina’stotalpopulationandGDP.OnDecember26,ChinapassedtheYangtzeRiverProtectionLaw,whichcameintoforceonMarch1,2021.ItisthefirstlawtoprotectawaterwayinChina.Themotherriverisingreatneedofprotectionbecausesomethingiswrongwithit.Forexample,becauseofoverfishingandwaterpollution,theriver’sChinesepaddlefishhasdiedoutthere.There’salsodesertifiedlandandsoilpollutionneartheriver.Accordingtothelaw,fishingwillnotbeallowedinalloftheYangtze'snaturalwaterways,includingitsmajortributaries(支流)andlakes.Thosewhoarecaughtfishingwillbefined(罚款)50000to500000yuan.Diggingsandwillbestrictlylimited(限制)intheriver.Manycompaniesarediggingsandalongtheriver.However,thishasledtolowerwaterlevelsontheriver,whichhascausedtheriver’swatertodecline.Companiesandfactoriesalongtheriverwillneedtofocusongreendevelopment.Iftheiractivitiesdoharmtothewaterways,theywillbemovedaway,thelawsays.10.Accordingtothepassage,whichistrueaboutprotectingtheriver?
[单选题]Passage2Youmayhaveheardthesaying“TheYangtzeRiverChina'smotherriver.”Itisalmost6400kilometerslong.Astheworld’sthird-longestriver,itcoversone-fifthoflandarea.TheYangtzeRiverEconomicZone(长江经济带)coverselevenprovincesandcities,makingupaboutfortypercentofChina’stotalpopulationandGDP.OnDecember26,ChinapassedtheYangtzeRiverProtectionLaw,whichcameintoforceonMarch1,2021.ItisthefirstlawtoprotectawaterwayinChina.Themotherriverisingreatneedofprotectionbecausesomethingiswrongwithit.Forexample,becauseofoverfishingandwaterpollution,theriver’sChinesepaddlefishhasdiedoutthere.There’salsodesertifiedlandandsoilpollutionneartheriver.Accordingtothelaw,fishingwillnotbeallowedinalloftheYangtze'snaturalwaterways,includingitsmajortributaries(支流)andlakes.Thosewhoarecaughtfishingwillbefined(罚款)50000to500000yuan.Diggingsandwillbestrictlylimited(限制)intheriver.Manycompaniesarediggingsandalongtheriver.However,thishasledtolowerwaterlevelsontheriver,whichhascausedtheriver’swatertodecline.Companiesandfactoriesalongtheriverwillneedtofocusongreendevelopment.Iftheiractivitiesdoharmtothewaterways,theywillbemovedaway,thelawsays.6.WhatdoesthefirstparagraphtellusabouttheYangtzeRiver?
[单选题]Passage2Youmayhaveheardthesaying“TheYangtzeRiverChina'smotherriver.”Itisalmost6400kilometerslong.Astheworld’sthird-longestriver,itcoversone-fifthoflandarea.TheYangtzeRiverEconomicZone(长江经济带)coverselevenprovincesandcities,makingupaboutfortypercentofChina’stotalpopulationandGDP.OnDecember26,ChinapassedtheYangtzeRiverProtectionLaw,whichcameintoforceonMarch1,2021.ItisthefirstlawtoprotectawaterwayinChina.Themotherriverisingreatneedofprotectionbecausesomethingiswrongwithit.Forexample,becauseofoverfishingandwaterpollution,theriver’sChinesepaddlefishhasdiedoutthere.There’salsodesertifiedlandandsoilpollutionneartheriver.Accordingtothelaw,fishingwillnotbeallowedinalloftheYangtze'snaturalwaterways,includingitsmajortributaries(支流)andlakes.Thosewhoarecaughtfishingwillbefined(罚款)50000to500000yuan.Diggingsandwillbestrictlylimited(限制)intheriver.Manycompaniesarediggingsandalongtheriver.However,thishasledtolowerwaterlevelsontheriver,whichhascausedtheriver’swatertodecline.Companiesandfactoriesalongtheriverwillneedtofocusongreendevelopment.Iftheiractivitiesdoharmtothewaterways,theywillbemovedaway,thelawsays.7.WhatdoweknowabouttheYangtzeRiverProtectionLaw?
[单选题]Passage2Youmayhaveheardthesaying“TheYangtzeRiverChina'smotherriver.”Itisalmost6400kilometerslong.Astheworld’sthird-longestriver,itcoversone-fifthoflandarea.TheYangtzeRiverEconomicZone(长江经济带)coverselevenprovincesandcities,makingupaboutfortypercentofChina’stotalpopulationandGDP.OnDecember26,ChinapassedtheYangtzeRiverProtectionLaw,whichcameintoforceonMarch1,2021.ItisthefirstlawtoprotectawaterwayinChina.Themotherriverisingreatneedofprotectionbecausesomethingiswrongwithit.Forexample,becauseofoverfishingandwaterpollution,theriver’sChinesepaddlefishhasdiedoutthere.There’salsodesertifiedlandandsoilpollutionneartheriver.Accordingtothelaw,fishingwillnotbeallowedinalloftheYangtze'snaturalwaterways,includingitsmajortributaries(支流)andlakes.Thosewhoarecaughtfishingwillbefined(罚款)50000to500000yuan.Diggingsandwillbestrictlylimited(限制)intheriver.Manycompaniesarediggingsandalongtheriver.However,thishasledtolowerwaterlevelsontheriver,whichhascausedtheriver’swatertodecline.Companiesandfactoriesalongtheriverwillneedtofocusongreendevelopment.Iftheiractivitiesdoharmtothewaterways,theywillbemovedaway,thelawsays.8.WhatdoesParagraph3explain?
[单选题]Passage2Youmayhaveheardthesaying“TheYangtzeRiverChina'smotherriver.”Itisalmost6400kilometerslong.Astheworld’sthird-longestriver,itcoversone-fifthoflandarea.TheYangtzeRiverEconomicZone(长江经济带)coverselevenprovincesandcities,makingupaboutfortypercentofChina’stotalpopulationandGDP.OnDecember26,ChinapassedtheYangtzeRiverProtectionLaw,whichcameintoforceonMarch1,2021.ItisthefirstlawtoprotectawaterwayinChina.Themotherriverisingreatneedofprotectionbecausesomethingiswrongwithit.Forexample,becauseofoverfishingandwaterpollution,theriver’sChinesepaddlefishhasdiedoutthere.There’salsodesertifiedlandandsoilpollutionneartheriver.Accordingtothelaw,fishingwillnotbeallowedinalloftheYangtze'snaturalwaterways,includingitsmajortributaries(支流)andlakes.Thosewhoarecaughtfishingwillbefined(罚款)50000to500000yuan.Diggingsandwillbestrictlylimited(限制)intheriver.Manycompaniesarediggingsandalongtheriver.However,thishasledtolowerwaterlevelsontheriver,whichhascausedtheriver’swatertodecline.Companiesandfactoriesalongtheriverwillneedtofocusongreendevelopment.Iftheiractivitiesdoharmtothewaterways,theywillbemovedaway,thelawsays.9.Whatdoestheunderlinedword“decline”inParagraph5mean?
