2023年八年级暑期话题阅读天天练：身体部位（含解析）

第第页2023年八年级暑期话题阅读天天练：身体部位（含解析）2023年八年级暑期话题阅读天天练：身体部位

（共9题）

一、阅读理解题（共9题）

Theworldhasmanybeautifulsounds.Wecanhearthesongsofbirdsandthelaughterofpeople.Wecanlistentocoolmusicandnewsreports.Andit'sallbecauseofourears!Theybringusaworldofsounds.

Butsomepeoplecan'thearanysoundatall.Someareborn①deaf.Otherscanhearwellintheirchildhood,buttoomanyloudsoundshurttheirearslateron.

ManypeopleinChinacan'thearordinary(普通的)soundsclearly.Alargenumberofthemarechildren.Mostofthemarebornwithgoodhearing.But6childrenoutofevery1,000havehearingproblemswhentheyareborn.Andifachildhashearingproblems,usuallyheorshewillalsohavelearningproblemsatschool.

Alotofthingscancausehearingproblems.Forexample,toomuchearwax(耳垢)isnotgoodforourhearing.Andnoiselouderthan85decibels(分贝)canhurtourearsandmakeusloseourhearingforashorttimeorevenforever.

Hearingisimportantforallofus.②Soweshoulddoourbesttogiveourearsspecialcare.Don'tforgettodothefollowing:

●Trytostayawayfromplaceswithtoomuchnoise.Ifyouhavetogo,wearearplugs(耳塞).Apairofgoodearplugscancutthenoiseby30decibels.

●Whenswimming,remembertoputearplugsintoyourearstostopwaterfromgettingin.

●Neverputanythingsharp(尖锐的)intoyourears.Ifyouthinkyouhavetoomuchearwax,askyourmumordadtohelpyoucleanitout.

Ifyoukeepthesethingsinmind,youwon'thavetroubleinhearingsounds.

(1)()选出文中划线单词①的词义。

A.聋的

B.不愿意听的

C.不理的

D.瞎的

(2)Whatproblemswillthechildrenalsohaveiftheirhearingispoor

(3)完成句子，每空不超过三个词。

1.Loudernoisecanhurtthechildren'searsandmakethemlosetheirforashorttimeorevenforever.

2.Weshouldputearplugsintoourearswhileswimmingtostopwaterfromourears.

3.Thewritetellsushowtoourears.

(4)从文中找出可以替代下列的词汇或短语。

1.many—

2.common—

3.awhile—

4.haveproblem—

(5)将文中划线部分②翻译成汉语。

阅读下列短文，根据短文内容，从短文后各题所给的选项中，选择最佳选项。

Mostteethgrowinone'schildhood.However,wisdomteethusuallyappearbetweentheagesof17and25.Mostadultshavefourwisdomteeth,butitispossibletohavemore,inwhichcasetheyarecalledsupernumeraryteeth.Wisdomteethcommonlyaffectotherteethastheydevelop,sopeopleoftenpullthemout._____

Earlyhumanshadverydifferentdietsfromwhatwehavetoday._____Eatingrawfoodwashardwiththeirteeth.Bythetimetheyhadreachedtheirtwenties,itwascommonforthemtohavelostsometeeth.

Withoutenoughteeth,ancientpeoplewouldn'tbeabletochewthefoodtheyfound.Scientistsbelievethatinordertolive,earlyhumansdevelopedwisdomteeth._____

Luckily,ourpresent-daydietandlifestylehavemadeourlifemucheasier._____What'smore,ashumansnowhavesmallerjaws,yourwisdomteethmaygrowabnormallycausingseveralhealthproblemsifyoudon'tpullthemout.

_____Asaresult,somescientistsbelievethatwisdomteethwilldisappearcompletelyovertime.

WordBank

wisdom/wzdm/n.智慧；才智supernumerary/supnjumrri/adj.多余的raw/r/adj.生的；未煮的chew/tu/v.咀嚼；嚼碎jaw/d/n.下巴

(1)

A．Studieshavefoundthat35percentofmodernhumansneverdevelopwisdomteethatall.

B．Sowhydowehavewisdomteeth

C．Thismeanswisdomteetharenolongernecessaryforourlife.

D．Theseteethhelpedmakechewingeasier.

E．Theyhuntedandatethefoodtheycouldfind.

(2)

A．Studieshavefoundthat35percentofmodernhumansneverdevelopwisdomteethatall.

B．Sowhydowehavewisdomteeth

C．Thismeanswisdomteetharenolongernecessaryforourlife.

D．Theseteethhelpedmakechewingeasier.

E．Theyhuntedandatethefoodtheycouldfind.

(3)

A．Studieshavefoundthat35percentofmodernhumansneverdevelopwisdomteethatall.

B．Sowhydowehavewisdomteeth

C．Thismeanswisdomteetharenolongernecessaryforourlife.

D．Theseteethhelpedmakechewingeasier.

E．Theyhuntedandatethefoodtheycouldfind.

(4)

A．Studieshavefoundthat35percentofmodernhumansneverdevelopwisdomteethatall.

B．Sowhydowehavewisdomteeth

C．Thismeanswisdomteetharenolongernecessaryforourlife.

D．Theseteethhelpedmakechewingeasier.

E．Theyhuntedandatethefoodtheycouldfind.

(5)

A．Studieshavefoundthat35percentofmodernhumansneverdevelopwisdomteethatall.

B．Sowhydowehavewisdomteeth

C．Thismeanswisdomteetharenolongernecessaryforourlife.

D．Theseteethhelpedmakechewingeasier.

E．Theyhuntedandatethefoodtheycouldfind.

阅读下列短文，根据短文内容，从短文后各题所给的选项中，选择最佳选项。

Duringthedayweworkandplayandatnightwesleep.Ourbodiesrestwhilewesleep.Inthemorningwearereadytoworkandplayagain.Whileweareasleepourbodiesgrowmost.Childrenusuallyneedmoresleep.Wecangetourlessonsbetterandwefeelbettertoowhenwehaveplentyofrest.Boysandgirlsneedtenhoursofsleepeverynightwhentheyareeightornineyearsold.Ourbodiesneedlotsofairwhenwesleep.Ifwedonotgetenoughfresh(新鲜的)airwe'llfeeltiredwhenwewakeup.Whileinbedwemustnotcoverourheads.Ifwedo,ourlungs(肺)willnotgetenoughfreshair.Ifweopenourwindowsatnightwecanhaveplentyoffreshair.Coolairisbetterthanwarmair.Boysandgirlsmustgetenoughsleepiftheywanttogrowandbestrong.

(1)Ourbodiesgrowmostwhileweare_____.

A．eatingB．playingC．sleepingD．waking

(2)Whichofthefollowingisthebestairforus

A．Hotair.B．Coolair.C．Warmair.D．Dryair.

(3)Toolittlesleepmakesus_____.

A．happyB．hungryC．tiredD．grow

(4)Howmuchsleepshouldboysandgirlsofnineyearsoldhaveeverynight

A．Eighthours.B．Ninehours.C．Tenhours.D．Sevenhours.

(5)Whatdothelungsneedmost

A．Freshair.B．Food.C．Rest.D．Exercise.

Everyoneknowsthatexerciseisveryimportant.Weallneedtoexercise.Itcanmakeyourheartandbodystrong.Childrenwhooftenexercisearemorealert(灵活).Thatmeanstheydobetterintestsandschoolworkthanthosewhodon'texercise.

Herearesomewaystoexercise.Youcanwalk,run,swim,orplayballgames.Makesureyouexerciseinthefollowingways:Youhavetolikewhatyouaredoing.Exerciseenough—butnottoomuch.It'sbesttoexercisetwiceaweek.Thirtyminuteseachtimeisenough.Tryallkindsofsportsuntilyoufindone,twooreventhreesportsthatfeelrightforyou.

Youcanexerciseatfitnesscentre(健身中心).Thereisalotofequipment(器材)inthem.Theequipmentwillhelpexerciseyourarms,legsandotherpartsofyourbodytomakeyouhealthy.Somepeoplebuyequipmentfortheirhomes.Butit'sveryexpensive.

(1)Exercisecanmakeyourheartandbody_____.

A．expensiveB．happyC．strongD．healthy

(2)Whichsportisn'tmentioned(被提及)inthepassage

A．Playingsoccer.B．Skating.

C．Walking.D．Running.

(3)Ifyouoftenexercise,youmaybebetterat_____thanothers.

A．schoolworkB．houseworkC．sleepD．rest

(4)Ifyouwanttoexercise,it'sbesttodoit_____.

A．atfitnesscentersB．ingroups

C．inthemorningD．twiceaweek

(5)WhichofthefollowingisNOTtrueaccordingtothepassage

A．Thirtyminutes'exerciseeachtimeisenough.

B．Youdon'thavetoexercisetoomucheveryday.

C．Youneedn'tdoallkindsofsportstokeephealthy.

D．Youmustbuyequipmenttoexercise.

WhyDoPeopleBlinkTheirEyes

Peopleblink(眨眼)theireyestensofthousandsoftimeseveryday.Scientistshavelongbelievedblinkingwasanaturalmovementandservedmainlytokeeptheeyeballswet.Butanewstudysuggestsithasamoreimportantpurpose.

AninternationalteamofscientistsfromtheUniversityofCaliforniastudiedtheblinkingofhumaneyelids.ThejournalCurrentBiologypublishedtheirfindings.Theteamsaidtheyfoundthatblinking"repositionsoureyeballssowecanstayfocused"onwhatweareseeing.Theysaidthatwhenweblinkoureyelids,theeyesrollbackintotheirsockets(眼窝).However,theresearchersfoundtheeyesdon'talwaysreturntothesameposition.Theysaidthiscausesthebraintotelltheeyemusclestoreorganizeoureyesight.

GerritMaus,anassistantprofessorofpsychologyataTechnologicalUniversity,said,"Oureyemusclesarequitesluggish(迟缓的)andunclear,sothebrainneedstorepeatedlyadapt(适应于)itsmotorsignalstomakesureoureyesarepointingwherethey’resupposedto.Ourfindingssuggestedthatthebrainmeasuresthedifferenceinwhatweseebeforeandafterablink,andcommands(指挥)theeyemusclestomaketheneededcorrections."Theresearcherssaidthatwithoutsuchcorrectionsoursurroundingswouldappearunclearandevenjumpy.

Theresearcherssaidtheyaskedvolunteerstositinadarkroomwhilestaringatasmalldotonaflatsurface.Theyusedspecialcamerastofollowthevolunteer'sblinksandeyemovements.Aftereachblink,thedotwasmovedonecentimetertotheright.Thevolunteersdidnotnoticethis,butthebraindid.Itfollowedthemovementanddirectedtheeyemusclestorefocusonthedot.Afterthedotwasmovedinthisway30times,thevolunteers'eyeschangedtheirfocustotheplacewheretheypredicteditwouldbe.

ProfessorMaussaid,"Eventhoughparticipantsdidnotconsciously(自觉地)registerthatthedothadmoved,theirbrainsdid,andadjustedwiththecorrectiveeyemovements.Thesefindingsaddtoourunderstandingofhowthebrainconstantlyadaptstochanges,commandingoureyemusclestocorrectforerrorsinourbodies'ownhardware."

(1)Accordingtothenewstudy,blinkingeyescan_____.

A．repositioneyeballstostayfocused

B．consciouslycorrecteyemovements

C．makeoureyesadapttomotorsignals

D．servetokeeptheeyeballswet

(2)Theunderlinedword“register”inParagraph5probablymeans_____.

A．realizeB．reviewC．remindD．reason

(3)Thispassageshowsthat_____.

A．eyemusclesarequiteinactiveandunclear

B．theresearchisofgreatvalueintheeyemovement

C．thebrainplaysanimportantroleinseeingthingsclearly

D．volunteerscontroltheirblinkstofollowthechangesofthedots

阅读短文，并根据所读内容完成表格。

Weallknowteethareimportanttoourlife.WecelebrateNationalTeeth-LovingDayonSeptember20.

DoyouknowthelifecycleofteethinyourmouthChildrenunder6yearsoldhave20babyteeth.From6to13,peoplelosetheirbabyteethonebyone.Nowpermanentteeth(恒牙)begintogrow.Betweentheagesof17and25,somepeoplegrowwisdomteeth(智齿).Ofcourse,wisdomteethdon'tmakeyouanysmarter.Theylooklikeasymbol(象征)ofbeinggrown-ups.

DoyouknowhowtokeepourteethstrongandhealthyLet'slookatthefollowingtips.

Whatwecando:

Brushyourteethatleasttwiceaday:inthemorningandbeforebedtime.

Brushforatleasttwoorthreeminuteseverytime.

Brushupanddownoneverytooth.

Useadentalfloss(牙线)foryourteethtomakethemcleaner.

Getanewtoothbrusheverythreemonths.

Whatwecan'tdo:

Don'teattoomuchcandyandsweetfood,ordon'tdrinktoomuchsoda.

Don'teatveryhardfood.Thatcanhurtyourteeth.

Don'teatsnacksbeforebedtime.

Teethareimportanttoeveryone.Healthyteethhelpuseatfoodtoletusgrow.

Theyhelpusspeakclearly.Andyes,theyhelpuslookgood.

Teethare_____toeveryone.

_____isNationalTeeth-LovingDayOnSeptember20.

Whatisthelifecycleofteethlike◆Children_____6have20babyteeth.◆From6to13,permanentteethbegintogrow.◆_____17and25,somepeoplegrowwisdomteeth.Thatmeanstheygrowup.

_____canwekeepourteethstrongandhealthyThingswecando:◆Brushyourteethatleasttwiceaday:inthemorningandbeforegoingto_____.◆Brushforatleast2-3minuteseverytime.◆Brushupanddownon_____.◆Useadentalflosstomakeyourteethcleaner.◆Getanewtoothbrusheverythreemonths.Thingswe_____do:◆Nevereattoo_____sweetfoodordrinktoomuchsoda.◆Don'teatveryhardfoodbecausethatcanhurtyourteeth.◆Nosnacksbeforegoingtobed.

WhyareteethimportanttoeveryoneBecause_____teethcanhelpuseatfoodtoletusgrow,speakclearlyandlookgood.

阅读下列短文，根据短文内容，从短文后各题所给的选项中，选择最佳选项。

Manyofusdon'tpaymuchattentiontotheimportanceofeyecare.Itissaidthatifyoutakecareofyourbody,thenyoucansurelybehealthy.Thatiswhyoureyesshouldbegivenalotofcare.Naturaleyecareshouldbeputinanumberoneplace.

Thereareseveralcausesleadingtopooreyesightlikenotenoughfood,genes(基因)andaging(老化).Televisions,computersandreadingarealsothecausesofhavingpooreyesight.Ifyouhappentoworkinfrontofthecomputer,itisbesttotakeabreakeveryonceawhile.Somethingdirtycancauserednessandtheywillmakeyoufeeluncomfortable.Itisbadforyoureyes,too.Ifthishappens,thebestwayistocleanyoureyesbyusingcoldwater.Youmustalsotryyourbesttoprotectyoureyesfromharmfulthings.Forexample,sunglassesarenotjustforfashionbuttheycanalsoserveasagreatwaytoprotectyoureyesightfromUVrays.

Eatinghealthyfoodswilldogoodtoyoureyesight.RememberthatvitaminsA,CandEaregoodforeyes.Trytoeatfoodgroupsthathavethesevitamins.Andyoushoulddoeyeexercisesbecauseexerciseprotectsyoureyesight,too.Ifapersonexercisesregularly(定期地)andeatstherightkindoffood,hiseyeswillstayingoodconditionforalongtime.

Allabovearenaturalwaysofeyecarethathelpuskeephealthyeyes.Beinghappyallthetimecanbehelpfultoaperson'seyesight,too.Inaword,eyecareisveryimportant,nomatterhowoldapersonis.

(1)_____isthemostimportantwaytoprotectoureyes.

A．Naturaleyecare

B．Takingmedicine

C．Seeingthedoctor

D．Beinghappyallthetime

(2)Allthefollowingcausescanleadtobadeyesightexcept_____.

A．ageB．height

C．readingD．computers

(3)Whatshouldyoudoifyouhavetoworkinfrontofthecomputer

A．Eathealthyfoods.

B．Cleantheeyesbyusingcoldwater.

C．Wearapairofsunglasses.

D．Havearestafterworkingforawhile.

(4)Whatdotheunderlinedwords"UVrays"mean

A．沙尘B．闪电

C．紫外线D．超声波

(5)Whichisthebesttitleofthepassage

A．WaysofEyeCare

B．WaysofEyeExercises

C．WaysofBeingHappy

D．WaysofBeingHealthy

PainfulforYourEars

DoyouoftenlistentomusicatloudvolumesYoushouldknowthatthishabitisbadforyourhearing,accordingtotheWorldHealthOrganization(WHO).

Thehumanearhasthreedifferentparts.Theouterearisthepartyoucansee.Themiddleearandinnerearareinsideyourhead.Thatdoesn'tmeanthosepartscan'tbehurt.Theycanbeharmedbyloudnoises.Overonebillionyoungpeopleareatriskofhearinglossduetolisteningtoloudnoiseforlongperiodsoftime,saidWHO.ListeningtomusicorwatchingaTVshowatloudvolumescanharmyourhearing.

Soundsaremeasuredindecibels(dB分贝).Awhisperis30dB.Afriendtalkingisabout60dB.Thesoundofabusyroadisabout85dBandthesoundofarockconcertcanbeabout100dB.TheUnitedNationshasstandardsforsafelistening.Itisnotsafetolistentosoundsthatarelouderthan85dBforeighthoursor100dBfor15minutes.

Loudnoiseisharmfultotheinnerear.Mostofusarebornwithabout16,000haircells(听毛细胞)inourinnerears.Thesecellsdetect(探测)sounds.However,listeningtoloudnoiseforalongtimecanmakethesecellsworktoohardandcausesomeofthemtodie.Thisiswhatcauseshearingloss.

Somepeoplemightthinkthattheirmusicisn'tallthatloud.Butthiscandependonwhereyouare.Forexample,ifyouareinanoisyplacelikethesubway,youmightturnupyourmusictooloudwithoutrealizingit.Later,whenyoulistentoitthesamevolumeinaquietplace,youmightfeeluncomfortable.

WhatcanbedonetoprotectyourhearingUsenoise-canceling(降噪)headphones.Theseheadphonesgetridofbackgroundnoise.Youdon'tneedtoturnupthevolumeasmuch.Keepyourdevicevolumeat50to60percent.Limitdailyuseofheadphones.Listentosoundonyourmobiledevicesforamaximumofonehourperday.

Thelessloudnoiseyouhear,thebetter!

(1)Listeningtoloudmusiccauseshearingproblemsbecause_____.

A．itcanstopourearsfromresting

B．itputsourbrainsundergreatpressure

C．itcancausehaircellsintheinnereartodie

D．itmakespeoplegetusedtolisteningtoloudsounds

(2)Fromparagraph5,wecanknow_____.

A．peoplelovetolistentoloudmusic

B．peopledon'talwaysknowhowloudtheirmusicis

C．it'sgreattolistentomusiconthesubway

D．it'sreasonabletolistentoloudmusicinsomeplaces

(3)Thewriterprobablyagreesthat_____.

A．peoplehavetowearheadphoneswhilewalkingonabusyroad

B．listeningtomusiconTVisbetterforhearingthanonmobiledevices

C．youngpeopleshouldsetatimelimitoflisteningtomusicatloudvolumes

D．wearingnoise-cancelingheadphonescanstoptheouterearsbeingharmed

阅读选择

HaveyourparentsevertoldyouanystrangeorscarythingsaboutprotectingyoureyesForexample,theymighthavesaidthatyou'dgoblindfromreadinginthedark,butyoucouldmakeupforitbyeatingalotofcarrots.

Thisisjustoneofthewrongideasyoumayhaveheardof.Belowteenshaspickedoutscientificexplanationsforthreemistakesthepeopleoftenmakeabouteyes.Let'stakealook.

Caneatingcarrotsimproveyoureyesight

CarrotsarerichinVitaminA,whichisessentialforoureyes'generalhealth.VitaminAhelpstheeyestomakelightintosignals,allowingpeopletoseeinlowlightconditions.However,eatingmorecarrotsdoesn'thelpyouseebetter,Acertainminimumamountwillhelp,butalargenumberofcarrotswillnotgiveyousuperhumanvisionorallowyoutogetridofyourglasses.

Ifyourparentshavebadeyesight,willyouhavebadeyesight,too

Myopia(近视)canbepassedfromparentstochildren.AstudybytheAmericanOptometricAssociationfoundthatifbothparentsaremyopia,there'sa33to60percentchancethatthechildis.Forchildrenwhohaveoneparentwithmyopia,thechanceis23to40percent,andit'sdownto6to15percentforkidswithnon-myopiaparents.Sonomatterhowbadyourparents'eyesightis,youstillhaveachancehavinggoodeyesight.

Isittruethatpeoplewhoarecolorblindcan'tseecolors

Colorblindnessdoesn'tmeanthatsomeonecan'tseecolorsatall,likeablackandwhitemovie.Mostcommonly,itmeansthatsomeonehasdifficultytellingcertaincolorsapart,usuallygreenandredorblueandyellow.Colorblindnessisusuallyaconditioncausedbynothavingcolorconecellsorthecellsnotworking.Ifthecellsdon'trespondintherightwaytodifferencesinwavelengthsoflight,colorblindnesshappens.

Therearedifferentlevelsofcolorblindness.Somepeoplecannottellthedifferencebetweencolorsindimlight,whileothershavedifficultyinanylight.Inthemostseriousformofcolorblindness,everythingisseeninshadesofgray.

(1)Accordingtothepassage,whichistheRIGHTideaabouteatingcarrots

A．Eatingcarrotsdoesn'thelppeopleseebetter.

B．Peopleneedtoeatasmanycarrotsaspossible.

C．Eatingcarrotsisgoodforeyes,butpeopledon'tneedtoeatalotofthem.

D．Eatingalotofcarrotsisonlyappropriateforthosewhoworkinlowlightconditions.

(2)Sam'smotherisshortsighted,buthisfatherisnot.Howmuchcouldbehischancesofhavinggoodeyesight

A．6-15%.B．23-40%.C．33-60%.D．60-77%.

(3)Howdoestheauthordescribecolorblindnessaccordingtothepassage

A．Mostpeoplewhoarecolorblindcanonlyseegrey.

B．Lackingcolorconecellscancausecolorblindness.

C．Thosewhocan'ttellgreenfromredarenotreallycolorblind.

D．Mostpeoplewhoarecolorblindcanonlyseeblackandwhite.

(4)What'sthebesttitleofthispassage

A．MisunderstandingsAboutEyes.

B．AdviceOnProtectingYourEyes.

C．ReasonsForBadEyesightAndColorBlindness.

D．MedicalInformationAboutImprovingYourVision.

答案

一、阅读理解题（共9题）

1.【答案】

(1)A

(2)Learningproblemsatschool.

(3)①hearing②gettingin③protect

(4)①alotof②ordinary③ashorttime④havetrouble

(5)所以我们应该尽最大努力给予我们的耳朵特殊呵护。

【解析】

(1)分析“Butsomepeoplecan'thearanysoundatall.Someareborndeaf.Otherscanhearwellintheirchildhood,buttoomanyloudsoundshurttheirearslateron.”可知，此处描述一些人听不到的原因，一些是天生听不到，另一些是后天原因造成的。所以推测deaf是“聋的”含义。

(2)根据“Andifachildhashearingproblems,usuallyheorshewillalsohavelearningproblemsatschool.”可知，如果一个孩子有听力问题，通常他或她在学校也会有学习问题。

(3)根据“Andnoiselouderthan85decibels(分贝)canhurtourearsandmakeusloseourhearingforashorttimeorevenforever.”可知，噪声会损害孩子们的耳朵，让他们在短时间内甚至永远失去听力。所以第一处填hearing。根据“Whenswimming,remembertoputearplugsintoyourearstostopwaterfromgettingin.”可知，当游泳时，记得把耳塞进你的耳朵，以防止水进入。所以第二处填gettingin。根据文章内容可知，本文主要是告诉我们保护耳朵的方法，所以第三处填protect。

(4)many，翻译为“许多”，可用文中alotof替代；common，翻译为“普通的”，可用文中ordinary替代；awhile，翻译为“一会儿”，可用文中ashorttime替代；haveproblem，翻译为“有问题”，可用文中havetrouble替代。

(5)本句是so引导的结果状语从句，翻译为“所以”；we，翻译为“我们”；should，翻译为“应该”；doone'sbesttodosth，翻译为“尽某人最大努力去做某事”；give，翻译为“给予”；ourears，翻译为“我们的耳朵”；specialcare，翻译为“特殊呵护”。

2.【答案】

(1)B

(2)E

(3)D

(4)C

(5)A

【解析】

(1)句意：那么为什么我们有智齿呢？由下文内容可知，讲述了人们生长智齿的原因。

因此，正确答案是B。

(2)句意：他们搜寻并吃掉他们能找到的食物。根据“Earlyhumanshadverydifferentdietsfromwhatwehavetoday.早期人类的饮食与我们今天的饮食非常不同”