高考英语一轮复习课时作业21Unit21HumanBiology北师大版选修7Word下载.docx
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高考英语一轮复习课时作业21Unit21HumanBiology北师大版选修7Word下载.docx
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湖北省高考模拟]Withitssnowcoveredmountainsandavarietyofwildlife,YellowstoneNationalParkisoneofthescenictreasuresoftheUnitedStates.LocatedprimarilyinWyoming,theparkhostsmillionsofvisitorseveryyear.Ifyouplantotravelwithinthepark,keepinmindtheadvicefromtheNationalParkService.
SeasonalTravel
Travelvariesvastlyfromseasontoseason.Roadsaregenerallyopeninthesummerexceptforcasesofrockormudslides,wildfires,accidentsorroadconstruction.Earlysnowsinthefallcancausesomeroadstoclosetemporarily.Inthewinteralmostallroadsareclosedtomotorvehicles,butsnowmobilesandothersnowvehicleswithtracksareallowed.RoadsbegintoopeninthespringbythelatterpartofAprilbutmaycloseifsnowfallcontinues.
DrivingTime
GrandLoopRoadisthemainroadthroughYellowstoneNationalPark,anditpassesbymostofthemajorattractions.TheseincludeOldFaithful,YellowstoneLakeandtheGrandCanyonofYellowstone.ThemaximumspeedlimitontheGrandLoopis45milesperhour,butthespeedlimitdropsduringsomeofthewindingandtwistysectionsofthisnarrowroad.Allowyourselfatleasttwodaystofullytraveltheloopduetothesizeoftheparkandoccasionallyheavytraffic.
SafetyAwareness
Buffalooftenblocktheroadsintheparkastheymigratethroughthefields.Ifaherdistravelingacrosstheroadyouareon,youcaneitherwaitforthemtopassorfindanalternativeroute.Ifyougetoutofyourvehicle,youshouldstayatleast25yardsfromanybuffalo(and100yardsormoreawayfrombearsandwolves).Buffaloareparticularlyunpredictableandchargepeopleatspeedsupto30mph.
Youcantakeyourbicycleonanypublicroadsandroutesdesignedforbikes,butbicyclesarenotallowedontheparkroadswhicharenarrowwithfewshoulders.Elevationsrangefrom5,300to8,860feet.TheNationalParkServicerecommendsthatcyclistswearhelmetsandnoticeableclothing.
1.WhatisTRUEabouttravelingintheYellowstonePark?
A.Roadswillstayopeninspiteofemergency.
B.Trafficjamisactuallyararething.
C.Thedrivingspeedontheroadcanbe50mph.
D.Motorvehiclesareallowedinthewinter.
2.WhatsafetyadvicedoestheNationalParkServiceoffer?
A.Undernocircumstancescouldyougetoutofthecar.
B.Keepgoingforwardwhencomingacrossthebuffalo.
C.Doweareasytoseeclotheswhilebicycling.
D.Bicyclingisforbiddenonthepublicroads.
3.Wherecanyouprobablyfindthisarticle?
A.Inaguidebook.
B.Inageographytextbook.
C.Inaresearchpaper.
D.Inacommercialadvertisement.
B
昆明市教学质量检测]FiveyearoldPrisillaPerez,astudentatMeadorElementarySchoolinWillis,wasunhappywithherrecenthaircut,whichresultedfromaseveredisease.WhenstudentsinherclassstartedcallingPrisillaaboy,shefeltashamed,oftencryingandlosingfocusinschool.
Herteacher,ShannonGrimm,sympathizedwithherunhappiness.GrimmandPrisilla'
smomwereconcerned,buttheirideasdidn'
twork.“Wehadclassroomdiscussionsabouthowgirlshaveshorthairandboyshavelonghair,andIshowedthemphotosofmoviestarswithdifferentlooks,”Grimmsaid.“However,itwasn'
tsinkingin.”
GrimmthoughtaboutPrisillathroughoutthewinterbreak,andonemorning,shehadanidea:
Cutoffherhair—ascarythoughtforGrimm,whoworeherhairlongandtookprideinit.“I'
veneverhadshorthair,andIstressedaboutitfortwoweeksbeforemakingadecision,”shesaid.OnJan.4,Grimminvitedahairstylistfriendtoherhome.“Itoldhimtokeepgoing,evenifIcried,”shesaid.
Theclasslovedtheirteacher'
snewdo,especiallyPrisilla,whoexcitedlyranofftheschoolbusthatafternoonyelling,“Mom,Ms.Grimmcutherhair!
”Theteacheralsoboughtmatchingbowsforherselfandthegirl,sotheycouldstyletheirhairtogether.
InFebruary,theteacherrecommendedPrisillafortheschooldistrict'
sStudentoftheMonthAward,butduringtheMondayceremony,shereceivedasurprise“heromedal”fromthegirl.“Nowwehavematchingawards,”saysGrimm.
Prisilla'
smother,Maria,saidthatGrimm'
sthoughtfulnessbroughthertotears.“Iwasshocked.Iwascrying.Icouldn'
tbelieveit—shedidsomethingIwouldn'
thavethebraverytodo.Iwillneverforgetthat.”
4.WhywasPrisillaunhappyatschool?
A.Shewasn'
tsatisfiedwithherteacher.
B.Shecouldn'
tconcentrateinclass.
C.Shewaslaughedatbyherclassmates.
D.Shecouldn'
tgetonwellwithothers.
5.WhatmadeGrimmhaveherownhaircut?
A.Praisefromherstudents.
B.Devotiontoherstudents.
C.RequestofPrisilla'
smother.
D.Suggestionfromthehairstylist.
6.WhatcanweknowaboutGrimm?
A.ShehadherhaircuttogetherwithPrisilla.
B.Sheexpressedhersincerethankstoherpupils.
C.Shehesitatedalotbeforehavingherhaircut.
D.Shewonagoldmedalforfacingdifficultiesbravely.
7.Whatisthetextmainlyabout?
A.HowGrimmhelpedherstudentout.
B.WhatproblemPrisillahadatschool.
C.WhyPrisillawontheMonthAward.
D.WhenGrimmgothernewhairstyle.
C
武汉调研]Whileelephantsbornwithouttusks(长牙)arenotunheardof,theynormallyformjust2to6percentofthepopulation.However,thatisnotthecaseatMozambique'
sGorongosaNationalPark,whereanastonishing33percentoffemaleelephantsbornafterthecountry'
sconflictendedin1992aretuskless.Whilethatmayappeartobejustacoincidence,JoycePoole,anelephantbehaviorexpert,hasanothertheory.Theresearcherthinkswemaybewitnessingunnaturalevolutionofthespeciesduetotheconstanthuntingofelephantsforvaluableivory.
Poolesaysbeforethecountry'
s15yearlongconflict,theparkwashometoover4,000elephants.However,bythetimetheconflictendedin1992,about90percentofthemhadbeenkilledforivorytogetmoney.Ofthelessthan200survivors,over50percentofadultfemaleshadnotusks.Therefore,itisnotsurprisingthatthepark'
stusklesselephantpopulationhasgrowngreatly.
Thisisnotthefirsttimeresearchershaveobservedagreatchangeinthepopulationofelephants.AtZambia'
sSouthLuangwaNationalParkandLupandeGameManagementArea,areaswhichwereheavilyhuntedinthe1970sand1980s,35%ofelephants25yearsoldorolderand13%ofthoseyoungerthan25arenowwithouttusks.A2008studypublishedintheAfricanJournalofEcologyfoundthatthenumberoftusklessfemalesattheRuahaNationalParkinTanzaniawentfrom10.5percentin1969toalmost40percentin1989,largelyduetoillegalhuntingforivory.
TherecentbanonivoryinboththeUSandChinashouldhelpgetridof,oratleastreduce,elephanthunting.However,scientistsarenotsurehowlongitwilltakeforelephantswithahigherrateoftusklessfemales,tochangethe_trend.
8.WhatistheprobablecauseofthephenomenonmentionedinParagraph1?
A.Illegalhunting.B.Constantfarming.
C.Apurecoincidence.D.Naturalevolution.
9.WhydidpeoplekillsomanyelephantsduringtheconflictinMozambique?
A.Togetmoneybysellingivory.
B.Todevelopnewdecorations.
C.Toprovidefoodforlocalpeople.
D.Tomakeivoryproducts.
10.Whichofthefollowinghadtheearliestrecordontusklesselephants?
A.GorongosaNationalPark.
B.SouthLuangwaNationalPark.
C.RuahaNationalPark.
D.LupandeGameManagementArea.
11.Whatdoestheunderlinedphrase“thetrend”inthelastparagraphreferto?
A.Elephantsfacinggreaterdanger.
B.Elephantsgrowingmoreslowly.
C.Fewerfemaleelephantsstayingalive.
D.Morefemaleelephantsbeingtuskless.
D
[2019·
东北三省四市二模]Youcan'
tseeyoursleepingpet'
sbrainwaves,butitsbehaviorcantellyouwhenyourcatmightbedreaming.Ifyouwatchclosely,you'
llseethatasshefallsasleep,herbreathingbecomesslowandregularwithherbodystill.Shehasenteredthefirststageofsleep,calledslowwavesleep.Afterabout15minutesyou'
llnoticeachangeinherbreathing.Hereyesmoveunderherclosedlids,herpawstwitch(抽动)andsheflicks(轻拂)anear.Shehasentereddreaming.Althoughshetwitchesandmakeslittlegruntingnoises,messagesfromherbraintothelargemusclesinherlegsareblocked,soshecan'
trunabout.Sheisinastateof“sleepparalysis(麻痹)”.
MichelJouvet,aFrenchscientist,interruptedtheirsleepparalysis.Eventhoughtheywerecompletelyasleep,thedreamingcatsbegantorunforballsthatJouvetcouldn'
tseeandarchedtheirbacksatunseenenemies.Hefiguredhewaswatchingthemactouttheirdreams!
Obviously,thedreamingcatsseemedtobepractisingimportantcatskills:
following,pouncing,andfighting.
Inanotherstudy,MattWilsonrecordedrats'
brainwaveswhiletheylearnedmazes.Oneday,heleftthebrainwaverecordingmachineonwhiletheratsfellasleep.ThepatternofbrainwavesinthesleepingratsmatchedthepatternfromthemazesocloselythatWilsoncouldfigureoutexactlywhichpartofthemazeeachratwasdreamingabout!
Manyresearchersnowthinkthatinbothpeopleandanimals,onepurposeofdreamsistopractiseimportantskillsandfigureoutrecentlearning.Thismayexplainwhysomanypeopledreamaboutfightingandescaping,skillsthatwereprobablyimportanttoourancestors,andwhydreamingaffectsourabilitytolearn.
Doallanimalsdream?
Fromlookingatthebrainwavesofsleepinganimals,howoftenanimalsdreamseemstobetiedtobodysize.Catsdreamaboutevery15minutes,miceevery9minutes,andelephantsevery2hours.Andthoughcowsandhorsesusuallysleepstandingup,theyonlydreamwhenlyingdown.
12.WhatdoesMichelJouvetfindinhis
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