2021年外研版中考英语总复习专项训练：阅读理解7　科技说明

阅读理解（七）科技说明

A

Airpollutionisabigproblemforcitiesinmostcountries.Manypeoplearedyingfromit.

Buthowcanwetelltheairqualityisgoodorbad?

InatreenexttoariverinAmsterdam,atinybirdhouseglows（发光）brightgreenwhentheair

isclean.Ifyou,restandingnearby,thebirdhousewillalsogiveyouafreeWi-Ficonnection

—butonlyifpollutionlevelislowenough.ThedesignerisJorisLam.Hisbirdhousetellsyou

abouttheairquality.

Joris'birdhouseiscalledTreeWifi.Itcanbeputonatreearoundyourhousetotestthe

airquality.Peoplecanseeascreenwithinformationaboutthelocalairqualityandhowtoimprove

it.

TreeWifiisasimplewayforpeopletoknowabouttheairpollutionaroundthem.Ifthebirdhouse

doesnotglow,peopleshouldcaremoreabouttheenvironment.Itremindsthemtochangetheir

lifestyles.Forexample,toprotecttheair,theycanridebikesorjustwalkinsteadofdriving

cars.

aImagineiftreesgavefreeWi-Fi,peoplewouldplantmoretreeslikecrazy.It'sapitythat

theyonlygiveustheoxygen（氧气）webreathe,“Jorissaid.

Thebirdhousedoesn,tworkasahomeforbirdsnow.Jorisandhisteamaretryingtomakesome

changestoit.Inthefuture,theyhopebirdswillliveinthebirdhouseandtheheatofitsgreen

lightwillbeusedtokeepbirdswarminwinter.

1.Whatdoestheunderlinedword“it"inParagraph1referto?（）

A.Thebirdhouse.

B.Airquality.

C.Airpollution.

2.PeoplecangetafreeWi-Ficonnectionwhen.（）

©peoplearestandingnearby

②thepollutionlevelislowenough

③theairqualityislowenough

A.①②B.②③

C.①③

3.Jorisdesignedascreenforthebirdhouseto.（）

A.receivethefreeWi-Ficonnection

B.protectthebirdhousefromtherain

C.showinformationabouttheairquality

4.Inthefuture,thebirdhousewillalsobeused.（）

A.asahomeforbirds

B.totellustheweather

C.togiveustheoxygen

B[2020・淄博]

Howcancactus（仙人掌）helptheworld?Itcanprovideanewkindofsustainablefuel（可持续

燃料）.Nopalimex,acompanyinMexico,hasmadeoneoftheworld'sfirstcactus-poweredfactories.

TheideacametoSosainNopalimexwhenhewaslookingforwaystosavemoneyforhisfoodfactory.

Henowpowershisfactorywithcactusgas（气体）.Thecosttoproducethegasishalfthecostof

electricity.

Soon,thegasproducedbyNopalimexwillalsobeusedincars.Nopalimex?sgasismadebyusing

thepricklypear（刺梨）一akindofcactus.Tomakethegas,thepricklypearismixedtogetherwith

manure（月巴料）.Thenthemixtureproducesthegasthatcanbeusedasfuel.

Whycactus?Fuelcanbemadefromotherplantssuchascorn,butthereareafewreasonswhy

cactusisabetterchoice.First,pricklypearsneedverylittlewaterandverylittlecare,and

growwel1inhottemperatures.Today,thesecharacteristicsarekey.Also,unlikecorn,prickly

pearsdon,tneedspacethatcouldbeusedforotherfoodplants.Theycangrowinareaswheremany

foodplantscan'tgrow.Last,aftermakinggasfrompricklypearsandmanure,theirbyproducts(§0

产品)canbeusedtohelpgrowfood.

Scientistsstillneedtodomoreresearchonmakingandusingpricklypeargas.Asprojects

likeNopalimexshow,wehavethepossibilitytoproducemoresustainablefueltopowerourlives.

1.Howcancactushelptheworld?()

A.BysavingfarmersJmoney.

B.Byprovidinganewkindofsustainablefuel.

C.Bytakingtheplaceofcorn.

D.Byproducingalotofelectricityandgas.

2.WhydoesSosapowerhisfactorywithcactusgas?()

A.Becausehewantstosavemoneyforhisfoodfactory.

B.Becausehehasgrownalotofcactusandcorninhistown.

C.Becausehewantstobewell-knownaroundtheworld.

D.Becausehewantstogrowcactusinsteadofcorn.

3.Whatdoestheunderlinedword“mixture“inParagraph2referto?()

A.TheNopalimexcompany.

B.Themanure.

C.Thepricklypearandmanure.

D.Cactus.

4.WhatisParagraph3mainlyabout?（）

A.Howcactusisusedtoproducegas.

B.Wherewecangrowalotofcactus.

C.WhatNopalimexdoeswithcactus.

D.Whycactusisabetterchoicetomakefuel.

C[2020•乐山]

Doyouknow5G?Itisthefifthgenerationofmobilenetworktechnology.Thesenewnetworks

arecoming.

Chinajustissuedcommerciallicenses（发放商用牌照）for5GonJune6,2019.Thismeansthat

China,stelecomcompanieswillbeabletooffer5Gnetworksformobilephoneusers.

Eachmobilenetworkgenerationisfasterandmorepowerfulthantheonebeforeit.1Gletus

talktoeachother.2Gletussendmessages.3GgaveusdataandtheInternet.And4Gmadeallof

thesethingsfaster.WhatJsspecialabout5G?

5Ghasaveryshortdelaybetweensendingandreceivinginformation.Now,4Gtakesabout100

to200milliseconds（毫秒）tosendandreceivedata.But5Gwillgetitdownto1millisecondor

less-thisisalmostreal-time.

ThisbigchangewillnotonlymakeourmobileInternetfaster,butalsodeeplychangeourlives.

Readontofindouthow.

5G+entertainment（娱乐）

5Gnetworksareabout100timesfasterthan4G.Thismeansyoucandownloadamovieinseconds

using5G.

Also,virtualreality（VR）gameswillbecomemorepopularwith5G.Theshortdelayof5Gwill

makethegamesfeelevenmorereal.

5G+transport

5Gwillalsobringussaferself-drivingcars.Thesecarscansendsignals（信号）toeachother.

Theyalsotalktotrafficlightsandroadsensors（传感器）.5Gwillallowcarstoreact（反应）even

fasterthanhumandrivers.

5G+smarthomes

5GalsomakestheInternetofthingspossible.Internetofthingsisalargenetworkthatconnects

everythingtotheInternet.Smarthomesarepartofit.

Forexample,yourtoastercanautomatically（自动土也）startmakingbreakfastafteryouralarm

rings.Andifitssensorfeelstheairbecomingdry,asmartsprinkler（洒水器）couldwateryour

plantsbyitself.

1.What,sthewriter,spurposeinwritingthethirdparagraph?（）

A.Toexplain5Gisthebestofall.

B.Tosharehisknowledgeabout5G.

C.Toencouragepeopletousethenewnetworktechnology.

D.Toshowthedevelopmentofmobilenetworktechnology.

2.Whatdoestheunderlinedword“delay“inParagraph4meaninChinese?（）

A.卡顿B.延时

C.暂停D.掉线

3.Whichofthefollowingwaysisnotmentionedthat5Gwillchangepeople*slives?（）

A.Healthcare.B.Entertainment.

C.Transport.D.Smarthomes.

4.Whatwillpeopledopossiblywith5Gaccordingtothepassage?（）

A.Downloadamovieinminutes.

B.PuteverythingontotheInternet.

C.Makeself-drivingcarssafer.

D.Makefoodmoreeasilyandfaster.

5.What'sthemainideaofthepassage?()

A.5Gwillchangeourlivesinmanyways.

B.Mobilenetworksarechangingforbetter.

C.5GwillmaketheInternetofthingspossible.

D.5Gnetworksformobilephoneusersarecoming.

【参考答案】

A［主旨大意］本文是一篇说明文。空气污染是一个大问题,设计师JorisLam设计了一个鸟舍一一TreeWifi„

本文介绍了TreeWifi的功能、用途、发展趋势,提醒人们注意空气质量变化，保护环境。

1.C代词指代题。根据短文第一段第一、二句"Airpollutionisabigproblemforcitiesinmostcountries.

Manypeoplearedyingfromit.”可知代词it指代前面的Airpollution。故选C。

2.A细节理解题。根据文章第二段中的"Ifyou,restandingnearby,thebirdhousewillalsogiveyou

afreeWi-Ficonnection—butonlyifpollutionlevelislowenough.”可知，当人们站在鸟舍附近，

而且污染水平足够低时才能获得免费的无线网络。故选Ao

3.C细节理解题。根据短文第三段中的"Peoplecanseeascreenwithinformationaboutthelocalair

qualityandhowtoimproveit.”可知,Joris为鸟舍设计一个屏幕的目的是显示空气质量信息。故选C。

4.A