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201*年春第四次月考八年級英語

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201*年春第四次月考八年級英語

201*年春綜合測試題(四)

八年級英語

命題:燕磯中學(xué)邵美貴

第Ⅰ卷(選擇題)

第一部分聽力測試

Ⅰ.聽力測試(共三節(jié),20小題,滿分25分)

第一節(jié):聽描述或?qū)υ,選圖畫。下面有2段描述和3段對話。聽完以后,從三幅圖畫中選出能回答所提問題的一幅。每段對話和描述聽兩遍。(每小題1分,共5分)

1.()

2.()

3.(

4.(

))

5.()

第二節(jié):聽對話,選答案。聽下面4段對話,根據(jù)對話內(nèi)容,從A、B、C三個選項中選出最適當(dāng)?shù)拇鸢浮C慷螌υ捖爟杀。(每小題1分,共10分)聽第6段材料,完成第67小題。

()6.Whodidntcometoschoolontime?

A.DanielandKitty.B.SimonandKitty.C.DanielandSimon.()7.Whydidnttheycometoschoolontime?

A.Becausetheygotuplate

B.Becauseoftheheavyraintheydidntcatchtheearlybus.C.Thetrafficwasbadbecauseoftheheavyfog.聽第7段材料,完成第89小題。()8.Whowenttothesupermarket?

A.Jane.B.Amy.C.Tom.()9.Whatdoesthewomanwant?

A.Shewantstogotothesupermarket.B.Shewantstotakeamessage.C.ShewantsAmytocallherback.聽第8段材料,完成第1012小題。()10.Whataretheytalkingaboutnow?A.English.B..ChineseC.Maths.()11.IsDickgoodatlistening?

A.Sorry,Idontknow.B.Yes,heis.C.No,heisnt()12.WhichonedoesDicklikebest?A.Reading.B.Writing.C.Listening.聽第9段材料,回答1315小題。()13.Wherearetheytalking?A.Inanoffice.B.Atthebusstop.C.Inashop.()14.Whatdoesthewomanwant?A.Acoat.B.Ahat.C.Acake.()15.Whatcolorisherfavorite?A.Brown.B.Grey.C.Black.

第三節(jié):聽短文,選答案。聽下面一段對話,根據(jù)短文內(nèi)容選擇正確答案。短文讀兩遍。(每小題2分,共10分)

()16.WheredoesMissLinwork?

A.Inaschool.B.Inarestaurant.C.Inapolicestation.()17.HowdoesMissLingotoworkeveryday?

A.Onfoot.B.Bybike.C.Bybus

()18.Whydidnobodyhelptheoldladywhenshecriedforhelp?

A.Becausethebadmanwasverystrong.

B.Becausenootherpeoplewereinthestreet.

C.Becausethepeopletherewerenotveryfriendly.()19.WhatdidMissLindotohelpthelady?

A.Shecalledthepolice.B.Shehitthebadman.C.Sheshoutedatthebadman.

()20.WhatisMissLinlike,accordingtothestory?

A.Honestandfriendly.B.Strongandhelpful.C.Braveandclever.

第二部分語言知識運用

Ⅱ單項選擇(共15小題;每小題1分,滿分15分)

()21.Doyouknow___lastnight?No,IcamebackfromWuhanjustnow

A.whatdidhappentoXiaoNingB.whatXiaoNinghappenedC.whathappenedtoXiaoNingD.whatishappenedtoXiaoNing()22---WhatdotheteacherstellyouaboutlearningEnglish?

八年級英語第1頁共8頁---Theyencourageus____foreignersbravely.AtotalkwithBtosayCtospeakDtotell()23.---WhatshouldIdoifIdontknowthemeaningoftheword?---Thebestwayisthatyouhaveto___________inadictionary.

A.lookforitB.lookitupC.lookupitD.lookitfor

()24Someonesays,“Moneyiseverything.”ButIthinktimeis_____importantthan

money

A.moremuchBmuchC.muchleastD.evenmore

()25.Jimsneverlateforschool,_?--_____.Sohisteacherisveryangrywithhim.A.isntheNoheisntB.isheYesheis

C.isntheNoheisD.isheYesheisnt

()26-IheardMrSundidntfeel_____________yesterday.Really?

---Yes,butnowhefeelsmuch_____________.A.good;wellB.well;wellC.good;betterD.well;better()27---Canyoutellmesomethingabouttherulestoplaythisgame?

---Sure.Ifonequestion________correctly,anotherquestion__________toyou.A.isanswered;isansweredB.willbeanswered;isansweredC.isanswered;willbeansweredD.answers;willbeanswered()28---WouldyoumindifIclosethewindow?

---__________________.Weneedfreshair.A.NotatallB.YoudbetternotC.Yes,ofcoursenotD.Thatsallright

()29.---HainanIslandisthe____________largestislandinChina.

---Yes,andtheweatherthereisnice.Soeveryyear_____peoplecomehereto

enjoythemselves.A.two;thousandofB.second;thousandofC.two;thousandsofD.second;thousandsof()30.---_________didyourauntleaveChina?

---She___________forthreeyears.

A.When;hasleftB.When;hasbeenaway

C.Howlong;hasleftD.Howlong;hasbeenaway()31----WhereisBobnow,Jack?

--Isawhim____intoanetbaramomentagoandItoldhim______.A.going;dontdoso.B.going;notdosoC.go;nottodosoD.went;nottodoit()32.Whattimeshallwemeetthisafternoon,3:00or4:00?Idontmind.____isokay.A.NeitherB.AllC.NoneD.Either()33.---MayIspeaktoJohn?

---Sorry,he____________Japan.Buthe_________intwodays.A.hasbeento,willcomebackB.hasgoneto,willbeback

C.hasbeenin,wouldcomebackD.hasgoneto,won"tcomeback()34._____greatnewsitwas!_____excitedyoulook!

A.WhathowB.WhatahowaC.HowwhataD.Howawhat()35WhydoesMissWanglooksoworried?八年級英語

Becauseshewonders.A.wheredotheotherstudentsgoB.whenwillthepolitemancome

C.ifherstudentshavearrivedinthestationDwhatherstudentshavedoneyesterday二.完型填空(共10小題,計10分)

閱讀下面短文,依據(jù)其內(nèi)容,從3645各題所給A、B、C、D四個選項中選出最佳選項,使短文完整、通順。

WangLing,amiddleschoolgirl,feltangrywithherparentsaftergettingaboysphonecall.“Aclassmatecalledmetodiscusshomework.Wetalkedforjustafewminutesbeforemyparentsgotmad,”saidthegirl.“Theyasked36Ilikedtheboy.IsaidIdidnt,buttheywouldntbelieveme.”

Wangstroubleisnotstrangeatallbecausepuppylove(早戀)becomesabigheadacheforschoolmakes37parentsandschools.Theyworrythatpuppylovewillbebadforitarulenottoallowanytalkoranyphysicalcontact(身體接觸)3938.Heroneboyandonegirlalone.

Manystudentssaytheyunderstand40parentsandteachersaresonervousaboutpuppylove.Butsomethinkto41withit,”saidWangLing.theyaregoingtoofar.“Wehaveourownthoughtsandweknowwhat

Anothergirl,JiangTing,likedmakingfriendswithboys.“Boysandgirlscanlearnfrommakingfriendswithboys.”O(jiān)nceJiangtoldhermothershemightfallinlovewithaboy.Her42”shesaid.“Mymotherasksmetostudyhard.However,she43stopsmefrommotherletJiangmakeherowndecision.SoonJiangfoundthatshedidntlike

him44becausetheboywasnotas55aswhatshehadthoughtbefore.Andshedidworseandworseinhersubjectsbecauseshespentmuchonit.Atlastsheunderstoodtheworryfromschoolsandmostparentsaboutpuppylove.

()36.A.whatB.whyC.whoDwhether()37.bothB.noneC.eitherD.neither()38.A.gameB.studyC.matchD.housework()39.AduringB.betweenC.aroundD.about()40.A.howB.whatC.whoD.why()41.A.dealB.liveC.doD.fill

()42.A.eachotherB.anotherC.othersD.theothers()43..A.neverB.alreadyC.everD.just()44..A..atallB.againC.nomoreD.anymore()45.A.betterB.wellC.bestD.good

第三部分閱讀理解

Ⅳ.閱讀理解(共三篇,15小題,計30分)

閱讀下面四篇材料,根據(jù)其內(nèi)容,選擇正確答案或完成閱讀任務(wù)

A

Sometimes,eventhebestfriendshavefights.Theydisagreewitheachotherandbegintoargue.Sometimes,theyevenstoptalkingtoeachotherforalongtime.

Whatcanwedoforthem?Findagoodfriendwhoknowsbothofthemverywellandaskhimorhertodosomethingforthem.Herearesomeusefulways:

Tellyourfeelingsclearlybutdontcriticize(批評)eitherofthem.Beginwith“Ifeel……”insteadof“Youalways……

第2頁共8頁

Listentotheotherpersoncarefully.Dontstoptheotherssentenceswhenheorsheisspeaking.

Lookattheotherpersonintheeyeswhenyouaretalking.

Askquestionstomakesurethatyouunderstandtheotherperson.Repeattheotherpersonsideassothatyoucanunderstanthem.

Neverputanyonedown.Sayingthingslike“Youarestupidorfoolish”maymakecommunicationdifficult.

Trytofindagoodsolution(解決方案)thatmakesthetwofriendshappy.Neverdecidewhoisrightandwhoiswrong.Istead,helpthemtofindtheirown“winwin”solution.A“winwin”solutionmakeseachofthemfeelgood.Inthisway,theywillbegoodfriendsagain.

()46Whentwofriendshaveproblems,theymay______

A.disagreewitheachotherandargueB.stoptalkingtoeachotherC.alloftheaboveD.havefights

()47.Whichofthefollowingisthebesttosaythefriendswhohadafight、A.Ifeel……B.Youalways……

C.Youareimpolite…D.Youarestupid.

()48.Whatshouldthepersondowhiletalkingwiththetwofriends?

A.Stoptheirsentencesintime.

B.Repeathisownideastomakehimunderstood.

C.Listentotheotherpersoncarefullyandasksomequestions.D.Lookdownatthegroundandsaynothing.

()49Whatdoestheunderlinedphrase“putanyonedown”meaninchinese?

A.令人失望B把人放下C提醒任何人D羞辱任何人()50.Howdoyouunderstanda“winwin”solution?

A.Itiswaythathelpsmakenewfriends

B.Itisawaythatmakesbothpeoplepleased.

CItisawaythattellswhoisrightandwhoiswrong.DItisawaythatcanbringyoumoney

B

Onceatigerwasinacage.Soonagoodmanwentby.Assoonasthetigersawtheman,thetigerbegantocry.“Please!Please!”thetigercalled.“Please,letmeout.”“No,”saidthegoodman.“IfIdo,youwilleatme.”“Iwillnoteatyou,”thetigersaid.“Pleaseletmeout.”

Thegoodmanbelievedthetiger.Heopenedthedoorofthecage.Thetigerjumpedout.“Howsillyyouare,”thetigerlaughed.“NowIamgoingtoeatyou.”“Wait!”themancried.“Youshouldnteatme.Letusaskotherswhattheythink.”“Youmayaskthreeothers.”thetigersaid.

Thegoodmanaskedatree.Thetreesaid,“Igiveshade(樹蔭).AndyetIamcutdown.Letthetigereatyou.”Next,thegoodmanaskedabird.Thebirdsaid,“Ihurtnoone.Yetpeoplehuntandkillme.Letthetigereatyou.”Thelastonethatthegoodmanaskedwasaroad.Theroadsaid,“Idontcareifthetigereatsyou.Peoplecouldnotgetalongtoowellwithoutme.Yetalldayandallnightpeoplestep(踩)onmewithoutevenathankyou.”

Thetigerwasreadytoeatthegoodman.Justthenadogcameby.“Whatis

happening?”askedthedog.Themantoldthedogthewholestory.“Idontunderstand,”saidthedog.“Thetigerwantstoeatyoubecauseyouputhiminacage?”“No,no,”saidtheman.“Someothermenputhiminacage.”“Oh,”thedogsaid.“Heisgoingtoeatyoubecauseyoudonothaveacage.”

“Sillydog!”thetigercried.“Dontyouunderstand?Iwasinthecage.Thismanletmeout.”“Oh,Isee,”thedogsaid.“Whenthemanwasinthecage,youlethimout.”“Iwasinthecage!”thetigercried.“Inthisway!”withthat,hejumpedbackintothecage.

Atonce,thedogclosedthedoorofthecage.“Oh,”thedoglaughed.“AtlastIunderstand!”

Thegoodmanandthedogwalkedoff.Thetigerlookedsadinthecage.Ifhewaitedlongenough,perhapsanothergoodmanwouldcomeby.

()51.Whenthetigersawtheman,hebegantocry,because________.A.hewantedthemantohelphimoutofthecageB.hewantedtoeattheman

C.hewantedtoeatdogD.hewantedtoeatthebird()52Afterthetigerjumpedoutofthecage,hewanted________.A.tothankthemanB.toeatthemanC.toasktheothersD.torunaway

()53Thetree________withthetigerbecause_______tothetree.A.agreed;humanswerekindB.agreed;humanswerenotkindC.disagreed;humanswerekindD.disagreed;humanswerenotkind()54.Thebirdletthetigereatthemanbecause________.A.peoplehelpedbirdsB.itlikedtigers

C.itlikedthemanD.peoplehuntedandkilledhim()55.Whathappenedtothetigeratlast?

A.Thedogagreedthatthetigercouldeatthegoodman.

B.Thetigeratethegoodmanandthedog.

C.Thetigerjumpedbackintothecageandwasclosedinthecageagain.D.Thetigermadefriendswiththegoodmanandthedog任務(wù)型閱讀

Lotsofkidslovevideogames.Infact,theylike(56)themsomuchthattheymightalwayshearsomethinglikethisfrommomanddad:“Enough!Turnoffthatthingandfindsomethingelsetodo!”

Itcanbegoodadvice.Toomuchofanythingisjusttoomuch.Itstruethatcertainvideogamescanbegoodforyou.(57)但是玩太多的電子游戲會導(dǎo)致健康問題。Itshardtogetenoughactiveplayandexerciseifyourealwaysinsideplayingvideogames.And(58)withoutenoughexercise,kidscanbecomeoverweight.Reallytoomanyvideogamesalsocouldaffectotherimportantthings,likefriendshipsandhowwellakiddoesinschool.Butheresthegoodnews:playingvideogamessomeofthetimecanbeOK.Justaimfornomorethan1or2hoursadayandchoosepropergames.

(59)Agoodgamewillbetherightoneforhowoldyouare.Yourmomordadcanhelpfindoutwhichgameyoucanplay.Ifyoucanchooseonethatgetsyouupandmoving,thats

八年級英語第3頁共8頁

evenbetter.Youmightchallengeyourmom,dadorevenyourgrandmatoplay

badminton(羽毛球)inagame.Couldyourgrandmabeagoodbadmintonplayer?Timetofindout!

任務(wù)一、寫出56處“them”所指代的對象。任務(wù)二、將57處漢語翻譯為英語。

任務(wù)三、將58處兩句改寫為復(fù)合句。

任務(wù)四、將59處英語翻譯為漢語。任務(wù)五、(60)根據(jù)短文內(nèi)容,用一句話概括其主旨。

第Ⅱ卷(非選擇題)

第四部分語言綜合運用及寫作

Ⅴ.完成句子(共9小題,每小題1分,滿分9分)

根據(jù)括號內(nèi)的漢語提示,用句末括號內(nèi)的英語單詞完成句子。

61.WhenIcamehome,myfather____(write)e-mailonthecomputer.

62.Sam________ChinesesincehecametoChina.HespeaksChinesewellnow.(learn)63.Iam_______(interest)indancingthansinging

64.Iaskhimifhe____(go)fishingwithmetomorrow,hesaysifit____(notrain),Hewillgo

withme

65Yuanlongpingisoneof__________(excellent)__________(science)66.Weshouldspeaktooldpeople_____(polite)

67.MrHanhadabig________(爭吵)withhiswife。.

68.Itcanbe___________(尤其)difficultfordriverstoseeclearlyatnight69.Thepoormanhasmany_________________(不愉快的經(jīng)歷)按要求完成句子(共5小題,每小題2分,滿分10分)

70.Heaskedmewillyouhelpmewithmystudy?改為間接引語He____________________________________.

71Thepopulationofourcountryismorethan201*0(對劃線部分提問)____________________________________________

72MrGreenshavelivedintheapartmentsincelastyear(對劃線部分提問)____________________________________________

73Thelittleboyseemedtotakeaninterestinsport.(改為復(fù)合句)____________________________________________74Ifyousmokeinpublic,Otherswillbeunhappy(同義句)_____________________!_____________________.

Ⅵ.補全對話(共3小題,每題2分,滿分6分)

讀下面的對話,在橫線上填寫出適當(dāng)?shù)木渥,將對話補全。

A:Hi,John.Youdidntcometoschoolyesterdayafternoon.Whatwaswrongwithyou?B:Iwasill

A;Imsorrytohearthat.75__________________?B:Muchbetter,butIstillcoughandfeelweak.A:Haveyouseenthedoctor?

B:Yes,Ihave.Iwenttothedoctorslastnight.Thedoctorgavemesomemedicineandaskedmetostayinbedforthreeday

A:_76_________________________?

B:BecauseImafraidIllmissmorelessonsandfallbehind.A:Dontworryaboutthat.77__________B:Itsverykindofyoutosayso.Thanksalot.A:Yourewelcome.Ⅶ書面表達(dá)(15)

某市教育局將每年的9月1日定為愛心慈善日(),今年活動的主題是“人人為貧困孩子獻(xiàn)愛心”請你以學(xué)生會的名義寫以峰倡議書,內(nèi)容要點如下:(括號的詞匯可做參考)1許多孩子因貧困而上不起學(xué)(too……to)

2每個孩子都有上學(xué)的權(quán)利(havetherighttodosomething)3我們應(yīng)該做一些我們力所能及的事去幫他們(as..aspossible)注意:開頭已給出,詞數(shù):90單詞左右Dearclassmates:

Insomepartofourcountry,Therearemanychildrenoutof

school._____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________Thankyoujoining!

ClassmatesTim

八年級英語第4頁共8頁

擴展閱讀:201*年春第四次月考八年級數(shù)學(xué)

201*年春綜合測試試題(四)

八年級數(shù)學(xué)

出卷人:燕磯中學(xué)周俊

②甲組學(xué)生成績比乙組學(xué)生成績穩(wěn)定;③甲組成績的眾數(shù)>乙組成績的眾數(shù);④兩組成績的中位數(shù)均為80,但成績≥80的人數(shù)甲組比乙組多,從中位數(shù)來看,甲組成績總體比乙組好;⑤成績高于或等于90分的人數(shù)乙組比甲組多,高分段乙組成績比甲組好。其中正確的共有().分?jǐn)?shù)5060708090100乙組4416212A2種B3種C4種D5種111.如圖,直線y=kx(k>0)與雙曲線y=交于A、B兩點,BC⊥x軸于

xC,連接AC交y軸于D,下列結(jié)論:①A、B關(guān)于原點對稱;②△ABC的

1面積為定值;③D是AC的中點;④S△AOD=.其中正確結(jié)論的個數(shù)為

2()

A.1個B.2個C.3個D.4個

12.如圖,在梯形ABCD中,∠ABC=90,AE∥CD交BC于E,O是AC

EC

人數(shù)甲組25101314612y

ACBDO

x

一、選擇題(3分×12=36分)

1、下列各式中,分式的個數(shù)有()

x12xy1115b(xy)2、、、、a、、、23m22x11a1(xy)A、2個B、3個C、4個D、5個

222m1無解,則m的取值為()x3x3AA、-3B、-2C、-1D、3

3.如圖,在直角梯形ABCD中,AD∥BC,點E是邊CD的中點,若

5ABADBC,BE,則梯形ABCD的面積為()

2B252525A.B.C.D.25

4282、若關(guān)于x的方程

DD的中點,AB=3,AD=2,BC=3,下列結(jié)論:①∠CAE=30;②AC=2AB;A

③S△ADC=2S△ABE;④BO⊥CD,其中正確的是()

A.①②③B.②③④C.①③④D.①②③④

O

二、填空題(3分×8=24分)

BC13.邊長為7,24,25的△ABC內(nèi)有一點P到三邊距離相等,則這個距離為E14.如果函數(shù)y=kx是反比例函數(shù),那么k=此函數(shù)的解析式

15、已知任意直線l把□ABCD分成兩部分,要使這兩部分的面積相等,直線l所在位置需滿足的條件是_________

AD//BC,ABCDAD1,B6016、如圖,梯形ABCD中,

P為MN上一點,直線MN為梯形ABCD的對稱軸,那么PCPD的B最小值。17、已知:

2k2k24.甲、乙兩人分別從兩地同時出發(fā),若相向而行,則a小時相遇;若同向而行,則b小時甲追上乙.那么甲的速度是乙的速度的()A.

ab倍bB.

b倍abC.

ba倍baD.

ba倍baAM5、一組數(shù)據(jù)0,-1,5,x,3,-2的極差是8,那么x的值為()

A、6B、7C、6或-3D、7或-3

6、在正方形ABCD中,對角線AC=BD=12cm,點P為AB邊上的任一點,則點P到AC、BD的距離之和為()A、6cmB、7cmC、62cmD、122cm

NC4AB是一個恒等式,則A=____,B=_____。2x1x1x137、若表示一個整數(shù),則整數(shù)a可以值有()

a1A.1個B.2個C.3個D.4個

8.△ABC的三邊長分別為a、b、c,下列條件:①∠A=∠B-∠C;②∠A:∠B:∠C=3:4:5;③a2(bc)(bc);④a:b:c5:12:13,其中能判斷△ABC是直角三角形的有()

A.1個B.2個C.3個D.4個

y

4A9.如圖,已知點A是函數(shù)y=x與y=的圖象在第一象限內(nèi)的交點,點xB在x軸負(fù)半軸上,且OA=OB,則△AOB的面積為()

xBO

A.2B.2C.22D.4

10、在一次科技知識競賽中,兩組學(xué)生成績統(tǒng)計如下表,通過計算可知兩組的方差為S甲=172,S乙=256。下列說法:①兩組的平均數(shù)相同;

八數(shù)

122

18.對甲、乙兩臺機床生產(chǎn)的零件進(jìn)行抽樣測量,其平均數(shù)、方差計算結(jié)果如下:機床甲:x甲=10,

22=0.02;機床乙:x乙=10,S乙=0.06,由此可知__(填甲或乙)機床性能好.S甲19.已知直角坐標(biāo)系中,四邊形OABC是矩形,點A(10,0),點C(0,4),點D是OA的中點,點P是BC邊上的一個動點,當(dāng)△POD是等腰三角形時,點P的坐標(biāo)為__20、如圖□ABCD中,E、F分別是AD、BC的中點,AC分別交BE、

AEDDF于G、H,試判斷下列結(jié)論:①ΔABE≌ΔCDF;②AG=GH=HC;

1③EG=BG;④SΔABE=SΔAGE,其中正確的結(jié)論是_個。

2三、解答題(共8題,共60分)

2

GBFHC1a3a22a121、(5分)已知實數(shù)a滿足a+2a-8=0,求的值.a1a21a24a

x-216x2222、(5分)解分式方程:x2x4x223.(8分)已知:如圖,在平行四邊形ABCD中,AE是BC邊上的高,將△ABE沿BC方向平移,使點E與點C重合,得△GFC.

(1)求證:BEDG;(2)若B60°,當(dāng)AB與BC滿足什么數(shù)量關(guān)系時,四邊形ABFG是菱形?證明你的結(jié)論.

GAD

BCEF

24、(6分)張老師為了從平時在班級里數(shù)學(xué)比較優(yōu)秀的王軍、張成兩位同學(xué)中選拔一人參加“全國初中數(shù)學(xué)聯(lián)賽”,對兩位同學(xué)進(jìn)行了輔導(dǎo),并在輔導(dǎo)期間進(jìn)行了10次測驗,兩位同學(xué)測驗成績記錄如下表:第1次第2次第3次第4次第5次第6次第7次第8次第9次第10次王軍張成68868080787579838185777778798480838092751

于點C,與y軸交于點D,已知OA=5,點B的坐標(biāo)為(,m),過點A作AH⊥x軸,垂足為H,

21

AH=HO

2

(1)求反比例函數(shù)和一次函數(shù)的解析式;(2)求△AOB的面積。

227.(9分)如圖,直線y=x+b(b≠0)交坐標(biāo)軸于A、B兩點,交雙曲線y=于點D,過D作兩坐標(biāo)

x軸的垂線DC、DE,連接OD.(1)求證:AD平分∠CDE;y(2)對任意的實數(shù)b(b≠0),求證ADBD為定值;

D(3)是否存在直線AB,使得四邊形OBCD為平行四邊形?若存在,E求出直線的解析式;若不存在,請說明理由.

xACO

B利用表中提供的數(shù)據(jù),解答下列問題:(1)完成表格

2(2)張老師從測驗成績記錄表中,求得王軍10次測驗成績的方差S王=33.2,請你幫助張老師計算

平均成績中位數(shù)眾數(shù)28.(10分)如圖,在直角梯形ABCD中,AB∥CD,∠8079.5王軍BCD=Rt∠,AB=AD=10cm,BC=8cm.點P從點A出發(fā),

8080張成以每秒3cm的速度沿折線ABCD方向運動,點Q從點D

出發(fā),以每秒2cm的速度沿線段DC方向向點C運動.已知動點P、Q同時發(fā),當(dāng)點Q運動到點C時,P、Q運動停止,設(shè)運動時間為t.

(1)求CD的長;(2)當(dāng)四邊形PBQD為平行四邊形時,求四邊形PBQD的周長;

(3)在點P、點Q的運動過程中,是否存在某一時刻,使得△BPQ的面積為20cm2?若存在,請求出所有滿足條件的t的值;若不存在,請說明理由.

2

張成10次測驗成績的方差S張;

(3)請根據(jù)上面的信息,運用所學(xué)的統(tǒng)計知識,幫助張老師做出選擇,并簡要說明理由。25、(8分)如圖,A城氣象臺測得臺風(fēng)中心在A城正西方向320km北的B處,以每小時40km的速度向北偏東60°的BF方向移動,距離

EF臺風(fēng)中心200km的范圍內(nèi)是受臺風(fēng)影響的區(qū)域。P⑴A城是否受到這次臺風(fēng)的影響?為什么?

⑵若A城受到這次臺風(fēng)影響,那么A城遭受這次臺風(fēng)影響有多長時

BA東間?

a

26、(8分)如圖,一次函數(shù)y=kx+b的圖像與反比例函數(shù)y=的圖像交于A、B兩點,與x軸交

x

八數(shù)

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