高考英语 Unit4 总复习课件 新人教必修3.ppt

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.Whenwegetclosertothemoonweshallfeelitsgravitypullingusbutitwillnotbetheearth’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.ButwhenItriedtostepforwardIfoundIwascarriedontheearthandfellover.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。Attheverybeginningtheearthwasjustacloudof__1__(energy)dust.Thenthedustcombined__2__aballmovingaroundthesun.Afterthatitexplodedloudlywithfireandrock__3__(produce)watervapourcarbondioxideandothergases__4__intheendmadetheearth’satmosphere.Thentheearthcooled__5__andwateroneoftheearth’sspecialqualitiesappearedandstayed__6__theearthwhichmade__7__possibleforlifetobegin__8__(develop).Somesmallplants__9__(grow)inthewaterappearedontheearth’ssurface__10__(follow)bylandanimals__11__insectsamphibiansreptilesandthe__12__importantanimalscalleddinosaursuntilfinallydinosaursdisappeared__13__ofasuddenandsomesmallcleveranimals