高考英语 Unit4 总复习课件 新人教版必修3.rar

Ⅰ.重点单词1.adj.猛烈的；激烈的；强暴的→n．激烈；猛烈2.adj.有害的→n．伤害→(反义词)3.n．发展→v．发展→adj.发展中的→adj.发达的；先进的4.v．依靠；依赖→n．依靠→adj.依赖的→(反义词)独立5.v．存在；生存→n．生存6.n．到场→adj.到场的；出席的→adj.缺席的；不到场的7.v．使失望；使落空→adj.感到失望的→adj.令人失望的→n．失望8.adv.逐渐地→adj.逐渐的9.n．谜；难题；v.(使)迷惑→adj.感到迷惑的→adj.令人迷惑的Ⅱ.重点短语1.solar太阳系2.eggs下蛋3.inone’s轮到某人；接着4.out挡住(光线)5.gettheof熟悉；掌握；理解6.out密切注视；当心；提防7.on依靠；依赖8.in及时；终于9.giveto产生；分娩10.up感到高兴；感到振奋11.既然12.out爆发；突发13.asaof由于……的结果14.getto靠近15.beto对……有害16....from阻止；制止17.toone’s令某人失望的是18.cool冷却19.(时间)前进；推移；走过20.comeinto开始存在；产生Ⅲ.重点句型1.itwastobecomewasuncertainuntilbetween4.5and3.8billionyearsagowhenthedustsettledintoasolidglobe.随后它会变成什么没人能知道，直到38～45亿年前，这团尘埃才慢慢地形成一个固体的球状物。2.Solifewillcontinueontheearthformillionsofyearstocomewilldependonthisproblemcanbesolved.所以，在未来的数百万年中，生命能否在地球上延续取决于这个问题能否得到解决。3.Whenwegetclosertothemoon,weshallfeelitsgravitypullingus,butitwillnotbetheearth’s.当我们更接近月球时，就会感到月球的引力在拉我们。但是，月球的引力不像地球的引力那样大。4.ButwhenItriedtostepforward,IfoundIwascarriedontheearthandfellover.而当我试着向前迈步的时候，我发觉我被送出去很远，步子的跨度竟是地球上的两倍，因而我摔倒了。Ⅳ.语篇练习根据课文HowLifebeganontheEarth完成下列短文。Attheverybeginning，theearthwasjustacloudof__1__(energy)dust.Thenthedustcombined__2__aballmovingaroundthesun.Afterthat,itexplodedloudlywithfireandrock，__3__(produce)watervapour,carbon，dioxideandothergases，__4__intheendmadetheearth’satmosphere.Thentheearthcooled__5__，andwater，oneoftheearth’sspecialqualities，appearedandstayed__6__theearth，whichmade__7__possibleforlifetobegin__8__(develop).Somesmallplants__9__(grow)inthewaterappearedontheearth’ssurface，__10__(follow)bylandanimals，__11__insects，amphibians，reptilesandthe__12__importantanimalscalleddinosaursuntilfinallydinosaursdisappeared__13__ofasuddenandsomesmallcleveranimalswithhandsandfeetappearedandspreadall__14__theearthandinplaceofdinosaurstheybecame__15__mostimportantanimalsontheplanet—thatis,humanbeings.[答案]1.energetic2.into3.producing4.which5.down6.on7.it8.todevelop9.growing10.followed11.including/like12.most13.all14.over15.theⅠ.重点词汇及短语1．existvi.存在；生存Theylaideggstooandexistedont