中考英語一輪復習講練測 七下Units 9-12【測試】（人教版）含解析

中考英語一輪復習講練測Unit9-12測一、單項選擇1.Tonyisof_________andhehas_________.A.

mediumheight;ashorthair

B.

amediumheight;shorthair

C.

mediumbuild,shorthair

D.

amediumbuild,shorthair【答案】C【解析】考查零冠詞的用法；hair是物質名詞，而物質名詞前不用冠詞。句意：托尼中等體格，而且他留短發(fā)。故選C。2.—_________dothetwinslooklike?—They_________mediumbuilds.A.

Where;has

B.

How,has

C.

Who;have

D.

What,have【答案】D【解析】對外貌提問要用Whatdoes...looklike?又因they是復數(shù)人稱代詞，故用have;句意：—雙胞胎長什么樣？？—他們中等體格。故選D。3.MydogFrankis________lazybutIstilllikeitverymuch.A.

apairof

B.

alotof

C.

toomany

D.

alittle【答案】D【解析】考查短語辨析。句意：我的狗弗蘭克有點懶，但我還是很喜歡它。A：apairof一雙的，后接名詞復數(shù)；B：alotof許多......，后接名詞；C：toomany太多......；D：alittle一點兒，可接不可數(shù)名詞或修飾形容詞。根據(jù)lazy，懶惰的，故選D。4.There's________teainthecupandyoucandrinkit.A.

kindof

B.

alot

C.

alittle

D.

toomany【答案】C【解析】考查短語辨析。句意：在杯子里有一點茶，你可以喝它。A.有點，修飾形容詞或者副詞；B.許多，修飾實義動詞；C.一點，修飾不可數(shù)名詞；D.太多，修飾可數(shù)名詞復數(shù)。tea茶，不可數(shù)名詞，所以用alittle，故選C。5.Chinesepeopleusuallyenjoythemoon______theevening____theMid-AutumnFestival.A.

in；for

B.

on；at

C.

in；on

D.

on；of【答案】D【解析】句意：在中秋節(jié)的晚上，中國人經(jīng)常賞月。in+年/月；for+時間，表示“一段時間”；at+鐘點；表示“在具體某一天的晚上”，用介詞on。故選D。6．Iamverythirsty（渴的）．Couldyoupleasegiveme_________water?A．some B．any C．other D．little【答案】A【解析】A.some一些，能修飾可數(shù)名詞復數(shù)和不可數(shù)名詞，主要用于肯定句，表示建議、勸告、請求時用于疑問句，B.any一些，能修飾可數(shù)名詞復數(shù)和不可數(shù)名詞，主要用于否定句和疑問句，C.other其他的，修飾可數(shù)名詞復數(shù)，D.little極少的，修飾不可數(shù)名詞。本句是表示請求的句子。句意：我很渴，你能給我一些水喝嗎？故選A。7．—MayItakeyourorder?—_________.A．That'llbe100yuan B．Yes,that'srightC．Yes,I'dlikegongbaochicken D．Large,please【答案】C【解析】句意：——你可以點菜了嗎？——是的，我想要宮保雞丁。一般疑問句的肯定答語Yes,否定回答No,根據(jù)上文MayItakeyourorder?你可以點菜了嗎？可知此處是進行點菜，故選C。8．—Samdoesn'tlikemutton，beef________onions.Whatdoeshelike?—Hethinksapples________pearsarenice.A．and;and B．or;or C．or;and D．and;or【答案】C【解析】考查連詞and和or的用法。句意：——山姆不喜歡羊肉、牛肉和洋蔥。他喜歡什么？——他認為蘋果和梨很好吃。連詞and，和，又，用在肯定句中連接并列部分；or還是，用在否定句中連接并列部分。前句是否定句，要用or；后句是肯定句，要用and。故填C。9．—Wouldyoulikesomejuiceorcoffee?—________.Ireallydon'tmind.A．Either B．Neither C．Both D．All【答案】A【解析】考查不定代詞的基本用法。句意：——你要果汁還是咖啡？——都可以。我真的不介意。A兩者中任何一個，表示選擇；B兩者都不，表示否定；C兩者都，表示肯定；D三者或三者以上都，表示肯定。根據(jù)題干中的juiceorcoffee以及Ireallydon'tmind可知，此句表示兩個都可以，隨便，要用不定代詞either，故選A。10．—?—Yes,Iwantalargebowlofpotatonoodles.A．CanIaskyouaquestion B．HowareyouC．Excuseme D．MayItakeyourorder【答案】D【解析】本題考查情景交際。選項A的意思是“我可以問一個問題嗎”；選項B的意思是“你好嗎”；選項C的意思是“勞駕，打擾了”；選項D的意思是“可以點菜了嗎”。根據(jù)答語Yes,Iwantalargebowlofpotatonoodles.是的，我想要一大碗土豆面條?？芍xD。11.Youlookworried!Is__________allright?A.

everything

B.

something

C.

anything

D.

nothing【答案】A【解析】考查復合不定代詞的區(qū)別，A.everything一切，B.something某事，C.anything任何事，D.nothing沒有事，故選A;句意：你看起來憂心忡忡的，一切還好吧？12.—Whatdoyouthinkofthesmartphone?—It'sgreatbuttoo________.Idon'thavesomuchmoneyforit.A.

cheap

B.

popular

C.

different

D.

expensive【答案】D【解析】考查形容詞辨析。句意：——你覺得智能手機怎么樣？——很好，但是太貴了。我沒有那么多錢買它。cheap便宜的；popular流行的；different不同的；expensive昂貴的。根據(jù)答語我沒有那么多錢買它?？芍撬前嘿F的，故選D。

13.—Youlook________，Henry.Youdidn'tsleepwelllastnight，right?—Yeah!LastnightIonlysleptforthreehours.A.

interested

B.

lovely

C.

quiet

D.

tired【答案】D【解析】本題考查詞義辨析，首先要弄清楚各個選項的意思，然后根據(jù)題干選出正確答案。句意：——亨利，你看上去很累，你昨天晚上沒有睡好，對嗎？——是的！昨天晚上我只睡了3個小時。A.有趣的；B.可愛的；C.安靜的；D.勞累的。根據(jù)

didn'tsleepwell，可知看起來是疲憊的，故選D。14.—Didyoutakeanyphotosinthezoo?—________.ButDavetooksome.A.

Yes,Iwas

B.

No,Iwasn't

C.

Yes,Idid

D.

No,Ididn't【答案】D【解析】考查一般疑問句及其回答。句意：——你在動物園里拍照片了嗎?——不，我沒拍。但是Dave拍了一些。本題考查一般疑問句及其回答，根據(jù)答語ButDavetooksome.，可知此處是否定回答。因為一般疑問句由did引導，其否定形式的回答為“No,sb.didn't”。故選D。15.It'ssuchan________filmthatallthestudentsare________init.A.

interesting;interested

B.

interesting;interesting

C.

interested;interested

D.

interested;interesting【答案】A【解析】形容詞辨析。第一個空film表示“物”，用interesting修飾，第二個空考查固定搭配beinterestedin。16.LastweekendI

abookonmusic.A.

read

B.

reads

C.

toread

D.

reading【答案】A【解析】本題考查一般過去時的用法。時間狀語是lastweekend，表示過去時，故動詞需要填過去式，read的過去式和原形一樣，故選A。句意是：上個周末我讀了一本關于音樂的書。17.IsawJim___________theviolininthemusicroomjustnow.A.

toplay

B.

plays

C.

toplaying

D.

playing【答案】D【解析】考查現(xiàn)在分詞。句意：我剛剛看到Jim在音樂室彈鋼琴。A.動詞不定式，B.動詞的三單形式，C.介詞+現(xiàn)在分詞，D.現(xiàn)在分詞。根據(jù)固定搭配seesb.doingsth.看到某人正在做某事，可知應用動詞paly的現(xiàn)在分詞。故選D。

19.

anexcellentstudent,hemustworkhardeveryday.A.

For

B.

As

C.

With

D.

About【答案】B【解析】本題考查介詞辨析。句意是：作為一名優(yōu)秀生，他必須每天刻苦學習。as“作為”，故選B。20.Whatshesaidmademevery________.A.

happily

B.

well

C.

happy

D.

sadly【答案】C【解析】考查形容詞。

句意：她所說的話使我很開心。makesb.+形容詞，使某人……，happily高興地，副詞，well可作形容詞，指身體健康的，作副詞，好地，happy高興的，形容詞，sadly傷心地，副詞。使某人開心makesb.happy。故選C。二、詞形變化1.Sheenjoys_______(listen)tothemusicafterclass.2.Welikedrawingandwedrawthebeautifultrees_________(different).3.Theboyoftengoes_______(swim)inthatriverinsummer.4.Myfatherisofmedium__________

(high).5.Look!It'sraining_________

(heavy).Don'tgoout,Mike.6.Eachchild________(have)abikeasagift.7.Thegirlisgoodatdrawing.Shewantstobean_______

(art).8.Iwouldlikeyou________(come)tomyhouse.9.Whatkindoffoodherfriend(like)?10.UncleJohn____________(water)theflowersinthegardennow.11.Itwas_________(wind)yesterday.Butit’s_________(sun)today.12.LastnightI________(hear)abignoise.13.Doyouthinkyouare________(luck)tohaveagoodteacherlikeMr.Wang?14.Look!Therearemany

(sheep)onthemountain.15.Myfatherwasbusyyesterdayandhe’skindof__________(tire)now.【答案】1.listening2.differently3.swimming4.height5.heavily6.has7.artist8.tocome9.doeslike10.iswatering11.windysunny12.heard13.lucky14.sheep15.tired三、單詞拼寫。1.Mysisterhasam__________build,andshehaslonghair.2.Ihavetogoonadiet(節(jié)食)becauseI’malreadyalittleh______.3.Iamagirl.Ihavear_________faceandasmalln________.4.Let’sgotothecinemat_______.We’llmeetatthegateafterschool.5.Shedoesn'thavecurlyhair.Herhairiss__________

.6.Pleaseclosethewindow.Thewindisb__________heavily.7.Thissongisp__________withyoungpeople.Youcanhearmanyofthemsingit.8.I’mtoohungry.IthinkIcaneattwolargeb_________ofricenow.9.It’sagoodi________tofinishtheworkinthisway.10.Ig___________someflowersinmygardenlastnight.11.Yourhandsareverydirty.Pleasemakethemc_____________.12.It’sd____________intheroom,andIcan’tfindmykeys.【答案】1.medium2.heavy3.roundnose4.together5.streight6.blowing7.popular8.bowl9.idea10.grew11.clean12.dark四、完成句子1.他留著棕色的短直發(fā)。Hehas________________________hair.【答案】shortstraightbrown2這對雙胞胎經(jīng)常不一樣地描述同一件事。Thetwinsoften________thesamething________.【答案】describe；differently3.她是一個瘦瘦的、中等身高、戴著耳環(huán)的女孩。Sheisa________

girlof________

________

and________

earrings.【答案】thin;mediumheight;wears4.謝謝你帶我們參觀你們的廣播電臺。

Thankyoufor________

________

________yourradiostation．【答案】showingusaround5.你要點菜嗎?MayI________

________

________?【答案】takeyourorder6.你剛才去散步了嗎?________you________forawalkjustnow?【答案】Did；go7.鮑勃上個月學到了很多關于計算機的知識。Bob________

________

________

________computerslastmonth．【答案】learnedalotabout8.我根本就不喜歡這件夾克衫。I________likethisjacket________

________【答案】don’tatall9.海倫上周有一個學校旅行。Helen

lastweek.【答案】hadaschooltrip10.你們可以生火取暖。

Youcan________

________

________to________

________.【答案】makeafire；keepwarm五、補全對話（5分）A根據(jù)對話內容，從方框中選擇恰當?shù)倪x項補全對話。其中有兩項是多余的。A：Hi,Jane!Wheredidyougoyesterday?

B：IwenttoLondon．

A：(1)__________________

B：Itwasverygood．

A：Really?(2)____________________

B：Myparents.

A：(3)____________________

B：WevisitedBigBenandwentshopping.

A：(4)___________________

B：Itwassunnyandwarm.

A：(5)___________________

B：Sure．A．Whowenttherewithyou?

B．Howlongdidittake?

C．HowwasyourtriptoLondon?

D．Didyouhaveagoodtimethere?

E．Whatdidyoudothere?

F．Whydidyougothere?

G．Howwastheweatherthereyesterday?【答案】CAEGDB根據(jù)所給對話,填寫適當?shù)膬热?使其完整、正確A:Hi,Linda.(1)__________yourweekend?B:Itwasgreat!A:Whatdidyoudoyesterday?B:I(2)____________withmyfriends.Wehadagoodtimethere.A:Whatdidyoudointhepark?B:Wewentboating,fedsomebirdsandplayedgamesthere.A:Where(3)_____________?B:Wehadlunchinasmallrestaurantnearthepark.A:When(4)_____________?B:Wecamebackataroundsixoclockintheafternoon.Howaboutyou?Whatdidyoudoyesterday?A:(5)____________.B:Thatsoundscool!Isbasketballyourfavoritesport?A:Yes.Iplayiteveryweekend.【答案】1.Howwas2.wenttothepark3.didyouhavelunch4.didyoucomeback5.Iplayedbasketball四、按要求改寫句子1.I’dlikesomebeefnoodles.(改為一般疑問句)_________youlike________beefnoodles?2.CanIhelpyou?(改為同義句）_______canI____________you?3.She'dlikemuttonandcarrotnoodles.(對畫線部分提問）____________________noodleswouldshelike?4.Theyhavesomebananas.（用pears改為選擇疑問句）theyanybananaspears?5.Janedidherhomeworkatschoolonehourago.（改為一般疑問句）________Jane________herhomeworkatschoolonehourago?6.Theyvisitedtheirgrandparentslastsummervacation.(劃線部分提問）________________they_________lastsummervacation?7.Theoldmanfedchickensyesterdayevening.(用everyevening改寫)Theoldman_________________everyevening.8.Hisfirstbookcameoutin1922.（對畫線部分提問）________________hisfirstbookcomeout?9.Myfatherhasabusyweekendeveryweek.（用lastweek改寫）Myfather____________abusyweekendlastweek.10.Mikeiseightyearsold.(改為同義句)Mikeis________________________boy.【答案】1.Wouldsome2.Whatdofor3.Whatkindof4.Dohaveor5.Diddo6.Whatdiddo7.feedschickens8.Whendid9.had10.an8-year-old六、短文填空A(2022年揚州中考)根據(jù)短文內容和首字母提示，在下文空格處填入適當?shù)脑~使短文完整，完整地寫出空缺處各單詞的正確形式。（每空一詞）TheGrandCanal（大運河）isaman-madewaterwaythatrunsnorthandsouthineasternChina.Datingback2,500yearsandstretching1,794kilometers,itisamongtheworld’soldestandl___1___canals.YangzhouChinaGrandCanalMuseumislocatedonthebankoftheancientGrandCanalinYangzhou,oneoftheeightc__2___inJiangsuprovincesittingalongtheGrandCanal.Themuseumo___3___itsdoorstothepubliconJune16,2021.Itcoversanareaofsome80,000squaremeters.Ithastwostructures:afour-storybuildinginthes___4___ofagiantshipwaitingtosetsail,anda100-meter-tallTang-Dynasty-styletower.Themuseumhas11themedexhibitions（展覽）.Theyaretellingtheh___5___oftheSui-TangGrandCanalbuiltduringtheSuiandTangDynasties（581-907）theBeijing-HangzhouGrandCanalandtheEastZhejiangCanal.Thesecanalsofferawealthofhistoricandculturalattractionsw___6___theycontinuetobeusedfortransport,irrigation（灌溉）andfloodcontrol.The25.7-meter-long,8-meter-highancientBianRiversectionisc___7___bymanyasthe“treasureofthemuseum”.Sofar,themuseumhasover10,000exhibits（展品）,including20groupsoflargeones,makingitthebestcollectiontoshowthegrandnessofthecanalandh___8___peoplechangednature.Passingt___9___theexhibitionhallandintotheantiquated（老式的）streets,visitorscanseerestaurantsandshopsalongthestreet,asifwalkinginthewatervillageonthecanalduringtheMingandQingDynasties.YangzhouChinaGrandCanalMuseumisdifferentfromalltheotherm____10____whicharethemedontheGrandCanalinChina.Whynotcomeandvisitityourself?【答案】1.longest2.cities3.opened4.shape5.history6.while7.considered8.how9.through10.museumsB、語法填空（2022年湖北鄂州中考）Beep!Beep!Beep!Thebarcode（條形碼）technologymakesitfasterandeasiertobuythingsinstores.Youhaveprobablyseentheblack-and-whitebarcodeon___1___(product)packaging（外包裝）.In2022,thegreatinventionis51yearsold.In1971,anIBMengineernamedGeorgeLaurer___2__(come)upwithacode（代碼）thatcouldbeprintedonfoodpackages.Then,acompletecodesystem（系統(tǒng)）,thebarcodewasformedlater.Thesystemwasusedbymany__3__(company)from1973.Beforethis,shopkeepershadto___4___(record)pricesbyhandwhichtookmuchtimeandenergy.Actually,abarcodeis___5___(real)asimpleidea:showeachproduct’sinformationindifferentnumbers（justliketheIDcardnumber）,then___6___(include)thesenumbersintoacodeandprintitforcomputerstoread.Today,barcodesarescanned（掃描）oversixbilliontimeseverydayandusedbytwo___7___(million)companies.Whatinformationdoesabarcodecarry?Wheretheproductcomesfrom,___8___(it)price,productiondate…Itcanalsohelpstoresalways___9___(know)abouttheirproducts.Forexample,ifthereare10boxesofmilkandacustomerbuysone,itwillberecordedsothatthestoreownerknowstherearenineboxes____10_____(leave)ontheshelf.Inthe1980s,librariesstartedtousebarcodestofollowtheirbooksinthisway.【答案】1.product2.came3.companies4.record5.really6.include7.million8.its9.Know/toknow10.left八、完形填空MydaybeganwhenIsawmysix-year-oldsonJonathandoingsomethinginthegardenbymyazaleabush(杜鵑花叢).BythetimeIgot____1____,Ifoundhe’dbrokenit!Itwasmyfavorite!“CanItakethistoschool?”heasked,smiling.Thoughabitunhappy,Inodded.ThenIturnedbacktothebrokenbushand____2____itasiftosaysilently,“I’msorry.”LaterIpruned(修剪)itwithgreatcare.Therestoftheday,Iwasbusydoingendlesshousework.Timehadpassedbyfast____3____Irealizeditwasalready3:00.Leavingtheclothesinthewashingmachine,Ihurriedlygottoschoolto____4____Jonathan.WhenIgotthere,theteachertoldmeshewantedtotalkaboutJonathan.Whatnow?Ithought.Ihadpreparedmyselffortheworst,____5____theteacher’swordsgreatlysurprisedme.“DidyouknowJonathanbrought____6____toschooltoday?”sheasked.Inodded,thinkingaboutmyfavoritebush.“Seethatlittlegirl?”theteacher___7___.Isawabright-eyedchildbusilydrawingapicturewithcrayons.I____8____again.“Well,herparentsareseparatedandshehasbeen____9____thesedays.IdidallIcouldtocomfort(安慰)her,butnothing____10____.ThismorningIwatchedyoursonwalkoverto____11____withsomeprettypinkflowersandsay,‘Thisisforyou’.”Ifeltmyheartfullof____12____forwhatmysonhaddone.HoldingJonathan’shand,Isaid,“Thankyou,you’ve____13____myday.”Iwaswarmedbythe____14____JonathanshowedtothelittlegirlandImadeupmymindtopassiton.Laterthateveningwhenmyhusbandcamebackhomefromatiringworkday,Ipickedsomepinkazaleasand____15____themtohim.“Thisisforyou,”Isaid.1.A.off B.out C.up D.on2.A.dropped B.pulled C.touched D.kicked3.A.after B.since C.before D.once4.A.pickup B.lookfor C.takecareof D.catchupwith5.A.and B.as C.or D.but6.A.clothes B.pictures C.crayons D.flowers7.A.laughed B.continued C.doubted D.shouted8.A.nodded B.turned C.smiled D.thought9.A.sad B.tired C.bored D.angry10.A.lasted B.appeared C.worked D.remained11.A.him B.her C.them D.you12.A.trust B.courage C.interest D.pride13.A.recorded B.made C.missed D.stolen14.A.kindness B.magic C.value D.humor15.A.threw B.lent C.handed D.sent【答案】1.B2.C3.C4.A5.D6.D7.B8.A9.A10.C11.B12.D13.B14.A15.C【解析】文章講述了作者因為每天的日?，嵤聦ι钍バ判模莾鹤拥淖龇ㄗ屪髡呤艿搅烁腥竞图ぐl(fā)，決心讓愛重新出現(xiàn)在她的家。1.句意：等我出來的時候，我發(fā)現(xiàn)他把它弄壞了！off從……離開；out離開，向外；up向上；on在……上；根據(jù)“Isawmysix-year-oldsonJonathandoingsomethinginthegardenbymyazaleabush(杜鵑花叢).BythetimeIgot...Ifoundhe’dbrokenit!Itwasmyfavorite!”可知，當作者從屋里出來的時候，getout“出去”，故選B。2.句意：然后我轉過身去，摸了摸那棵折斷的灌木，好像在默默地說：“對不起?！眃ropped丟；pulled拉，拽；touched觸摸；kicked踢；根據(jù)“itasiftosaysilently,“I’msorry.””可知，作者摸著那棵被折斷的植物，故選C。3.句意：時間過得很快，我意識到已經(jīng)3點了。after在……之后；since自從；before在……之前；once一旦；根據(jù)“Timehadpassedbyfast...Irealizeditwasalready3:00.”可知，主句是過去完成時，從句是一般過去時，此處應用before引導時間狀語從句，強調主從句動作發(fā)生的先后順序，故選C。4.句意：我把衣服放在洗衣機里，匆匆趕到學校去接喬納森。pickup開車去接；lookfor尋找；takecareof照顧；catchupwith趕上；根據(jù)“CanItakethistoschool?”以及“Ihurriedlygottoschoolto”可知，是去學校接兒子，故選A。5.句意：我已經(jīng)做好了最壞的準備，但老師的話讓我大吃一驚。and和；as好像；or或者；but但是；空格前后兩句之間是轉折關系，應用but連接，故選D。6.句意：你知道喬納森今天帶花來學校了嗎？clothes衣服；pictures圖片；crayons蠟筆；flowers花；根據(jù)“Jonathandoingsomethinginthegardenbymyazaleabush”可知，是帶花去學校，故選D。7.句意：老師繼續(xù)說。laughed大笑；continued繼續(xù)；doubted懷疑；shouted喊叫；根據(jù)“DidyouknowJonathanbrought...toschooltoday”以及“Well,herparentsareseparated...”可知，老師繼續(xù)說著，故選B。8.句意：我再次點頭。nodded點頭；turned轉向；smiled微笑；thought認為；根據(jù)“Inodded”及“again”可知，此處指的是“再次點頭”，故選A。9.句意：她的父母分開了，這幾天她很傷心。sad傷心的；tired疲憊的；bored厭煩的；angry生氣的；根據(jù)“herparentsareseparated”可知，父母分開了，女孩很傷心，故選A。10.句意：我盡我所能安慰她，但沒有任何效果。lasted持續(xù)；appeared出現(xiàn)；worked奏效；remained留下；根據(jù)“IdidallIcouldtocomfort(安慰)her,butnothing”可知，老師盡可能地安慰女孩但沒有效果，故選C。11.句意：今天早上，我看到你的兒子帶著一些漂亮的粉紅色花朵走向她，說，‘這是給你的?！県im他；her她；them他們；you你；此處指代的是前面提到的小女孩，應用her代替，故選B。12.句意：我為兒子所做的一切感到驕傲。trust信任；courage勇氣；interest興趣；pride驕傲；根據(jù)上文老師的描述可知，兒子做了一件好事，作者應該為兒子感到驕傲，故選D。13.句意：我握著喬納森的手說:“謝謝你，你讓我今天很開心。”recorded記錄；made制作；missed想念；stolen偷；兒子的表現(xiàn)讓作者很開心，makeone’sday“讓某人很開心”，故選B。14.句意：喬納森對那個小女孩的善良使我感到溫暖，我決心把它傳遞下去。kindness善良；magic魔法；value價值；humor幽默；兒子送給女孩花是為了讓女孩開心，這是一種善舉，故選A。15.句意：那天晚上，丈夫勞累了一天回到家，我摘了一些粉紅色的杜鵑花遞給他。threw扔；lent借出；handed遞；sent發(fā)送；根據(jù)“whenmyhusbandcamebackhomefromatiringworkday,Ipickedsomepinkazaleas”可知，此處說的是把花遞給了丈夫，故選C。九、閱讀理解（2022年浙江杭州）Ifyoulookaroundtheroomyouareinrightnow,you’llprobablynoticeanumberofelectronics.Butcanyouimagineiftheyallhadtobejoinedtogetherbywires(電線)?Picturethewiresnakingalongthefloor,forexample,fromyoursmartphonetoyourspeaker,orconnectingyourgamecontrollertothecomputerscreen,meaningyoucouldneversitmorethanacoupleofmetersawayfromit.Aworldofelectronicsconnectedbywireswouldn’tjustbeuntidy,butapossibledanger,too.That’swhereBluetoothcomesin.We’veallheardofit—butwhatexactlyisit?Bluetoothisamethodofshort-distance(短距離)wirelesscommunicationbetweenelectronicsthatmakesuseofthepowerofradiowaves.TheideawasfirstthoughtofbyDr.JanpHaartsenatSwedishmobilecompanyEricssonin1994.ThingsreallysteppedupinSeptember1998whentheBluetoothSpecialInterestGroup(SIG)wassetuptodevelopandspreadthetechnology.Bluetoot