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1、初一七年级下相交线与平行线典型题七年级下册相交线与平行线，是初中几何的敲门砖，所以同学们一定要认真学习。通过相交线和平行线的学习，尤其是一些典型例题的学习，更加深入的理解一些定理，更加灵活的运用它来帮助我们解决问题。同学们可以尝试通过典型例题的学习，去自己总结一下都运用到了那些定理！七年级卜相交线与平行线典型题1如图，直线AB、CD相较于点E,DFAB,若ND=70，则NCEB等于（）2.直线HA,A被直线心所截，N1=N2=35,ZP=90o,则/3=()3如图,J1/J29AB21fZABC=120Z=()5 .如图，J1/J29Na的度数是（b1206 .如图，当NBED与NB、ND满足
2、（）可以判定ABCD7 .如图，ABCD,/A+NAPC+/C的度数是8 .如图，AB7DE,Z1=120,Z2=105o,MZ3=()八年级英语下册3单元重点短与重点语法解析Unit3Cou1dyoup1easec1eanyourroom?I.重点短语：takeouttherubbish倒垃圾dothedishes洗碗sweepthef1oor扫地makethebed铺床fo1dc1othes叠衣服gooutfordinner出去吃晚餐gotothemoives去看电影stayout1ate熬夜很晚getaride骑车havetodo不得不workOr1从事he1poutWithSth.帮助
3、某人解决at1east至少finishdoing完成做某事bebackfrom从回来beangrywithsb.子口生气so1vetheprob1em解决问题throwdown扔下，抛弃infrontof在前面comeover过来takethedogforawa1k溜狗a11thetime一直，总是a11day整天wa1kaway走开insurprise吃惊地hangoutwith和.闲逛borrowfrom从.借1endto借给comeback回来somechores一些家务he1psb.withsth.在帮助某人drinksandsnacks饮料和零食invitesb.tosp.邀请某人去
4、某地gotothestore去商店useyourCDp1ayer用你的CD播放器haveatest考试haveaparty举行舞会havetimetodo有时间去做某事awasteoftime浪费时间spend.onsth.在花费inorderto目的是，以便getinto进入thereisnoneedtodo做某事没有必要providesth.forsb.给某人提供某物=providesb.withsth.minddoing介意做某事getgoodgrades取得好成绩dependon取决于deve1opchi1dren,sindependence发展孩子的独立性1ookafter照顾tak
5、ecareof照料asaresu1t作为结果fee1i11感觉不舒服agreewith同意disagreewith不同意.befair/unfairtosb.对是不（公）平的forexamp1e例如theear1ier.thebetter越早越好II.重点句型:1. .Co1dIgooutfordinnerwithmyfriends?我能和朋友一起出去出去吃晚饭，一Sure,thatshou1dbeOK.当然可以，那应该是很好的2. -Cou1dyoup1easetakeouttherubbish?请倒垃圾好吗。-Yes,sure.当然可以。3. -Cou1dyoup1easetakethed
6、ogforawa1k?请带狗出去散步好吗？4. Foroneweek,shedidnotdoanyhouseworkandneitherdidI.一周时间，她没做家务，我也没做。5. Theyshou1dspendtheirtimeonschoo1workinordertogetgoodgradesandgetintoagooduniversity.为了取得好成绩，进入一所好大学，他们应该在学业上花费一些时间。6. Theear1ierkids1earntobeindependent,thebetteritisfortheirfuture.孩子们越早学会独立，对他们的未来越有好处。I1重点语法
7、:1.if引导的条件状语从句。若主句从句的动作均为发生，则主句用一般将来时，从句用一般现在时代替一般将来时*时态要求:主将从现;主情从现;主祈从现e.g.Ifyouaskhim,hewi11he1pyou.Ifyouwanttobeascientist,youmuststudyhard.Tumofftheswitchifyou1eavetheroom.2. asas表示同级比较“和一样否定形式：notas/so.as.e.g.Sheisasbeautifu1ashermother.1esson5isnotas/sodifficu1tas1esson6.=1esson6ismoredifficu
8、1tthan1esson5.the+比较级，the+比较级越越e.g.Themore,thebetter.Theharderyouworkatyourstudy,thebettergradesyouwi11have.比较级and比较级越来越e.g.Itgetswarmerandwarmer.3. neither+助动词/be动词/情态动词+主语（倒装句）表示上句否定的情况也适合后者。so+助动词/be动词/情态动词+主语（倒装句）表示上句肯定的情况也适合后者。e.g.Theydidn,twatchTVyesterday.-NeitherdidI./Meneither.Heisnotadocto
9、r.-NeitheramI./Meneither.-TomspeaksChineseverywe11.-Sohedoes.Youcanswim.SocanI.4. assoonas一就引导时间状语从句。e.g.Ife11in1ovewiththehouseassoonasIsawit.注意：当主句是一般将来时，assoonas引导的状语从句使用一般现在时。e.g.Iwi11sendyouane-mai1assoonasIarriveinBeijing.5. whi1e在期间；当.的时候*与延续性动词连用（后面接的动词通常使用进行时）。*当主从句都是用进行时，也使用WhiIee.g.Iwaswr
10、itinga1etterwhi1eMomwaswatchingTV.Whi1eIwaswritinga1etter,hearrived.练习：1. -Cou1dyoup1easeturnofftheTV?-,I.Iwanttowatchthesportsnews.A.no,cou1dn,tB.Sorry,can,tC.Sure,canD.Sorry,cou1dn,t2. -Ted,cou1dyoup1easethetrash?Ofcourse,Mom.A.takeafterB.takeoffC.takeoutD.takecareof3. 我们春季前扫除，是为了扫走不好的运气。Wedosomec
11、1eaningtobad1uckbeforeSpringFestiva1.4. Nowa11ofusexerciseat1easthouradayinandoutsideschoo1.A.the,aB.a,anC./,aD./,an5. Aftershefinishedthestory,A1icewroteareviewforherschoo1newspaper.A.readB.readsC.toreadD.reading6. Wewi11gotoTian,anmanSquaretowatchtheraisingofnationa1ityf1agifittomorrow.A.wi11rainB
12、.rainsC.doesn,trainD.won,train7. Recyc1ingisgood,sodon,tbott1esornewspapers.A.findoutB.handinC.useupD.throwaway8. Man,sunderstandingofnatureisdeve1oping.Itneverstaysatthesame1eve1.A.attherighttimeB.forthefirsttimeC.fromtimetotimeD.a11thetime9.-Tomdidn,tgoforapicnicyesterday.-.A.SodidIB.SoIdidC.Neith
13、erdidID.NeitherIdid10.MustIsingthesonginRussian?No,you.Ifsuptoyou.A.mustn,tB.can,tC.don,tD.needn,t11.1 wi11sendyouane-mai1assoonasIin1ondon.A.arrivedB.arriveC.wi11arrive12. -Cou1dyoumeyourbike,Tom,-OK.Andyoucanitforaweek.A.1end,keepB.borrow;1endC.1end;borrowD.borrow,keep13. NancyhateschoresonSundays
14、.A.tomakeB.makingC.doingD.does14. Myfatherwasdrinkingteainthe1ivingroommymotherwasdoingthedishesinthekitchen.A.ifB.whi1eC.unti1D.un1ess15. -Weshou1dbekindtotheo1dandtakecarethemindai1y1ife.A.ofB.forC.withD.about16. Annoftenhe1psmemathafterschoo1.A.forB.withC.onD.by17. Mom,sha11Wegotothebeachtomorrow
15、.-Ittheweather.A.carriesonB.1ivesonC.dependsonD.ho1dson18.1 tisnecessaryforeveryonetoagoodhabitofreading.A.enjoyB.chooseC.deve1opD.accept19. Themorejunkfoodyoueat,hea1thyyouwi11be.A.the1essB.themoreC.moreD.1ess20. Ithinkit,s(fair)tojudgeapersonbeforeyourea11yknowhim.1重点知识点：1. Cou1dyoup1ease+动词原形？你能吗，(Cou1d表示委婉、客气的语气)*否定形式在动词原形前加note.g.Cou1dyoup1easepickupthecard?(1)请求对方
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