2017届《名师A计划》高考英语新人教版一轮复习配套课件：必修3 Unit 4《Astronomy：the science of the stars》_高考复习指南

2017届《名师A计划》高考英语新人教版一轮复习配套课件：必修3 Unit 4《Astronomy：the science of the stars》

　　重点短语重点句型重点单词 17.gravityn.万有引力;重力 18.satelliten.卫星,人造卫星 19.gentleadj.温和的;文雅的 gentlyadv.温和地;温柔地,轻轻地 20.physicistn.物理学家 physicsn.物理学 physicaladj.物质的;身体的;物理的 21.climaten.气候 22.crashvt.& vi.碰撞;坠落 23.spaceshipn.宇宙飞船 24.pulln.& vt.拉(力);拖;牵引力 25.floatvt.& vi.(使)浮动;(使)漂浮 n.漂浮物

　　重点短语重点句型重点单词 1.in time 及时;终于 2.lay eggs 下蛋 3.give birth to 产生;分娩 4.in one’s turn 轮到某人 5.prevent...from 阻止,制止 6.block out 挡住(光线) 7.cheer up 感到高兴;感到振奋 8.a mass of 大量的 9.now that 既然 10.break out 突发;爆发 11.watch out 密切注视;当心,提防

　　重点短语重点句型重点单词 1.这就产生了一系列的反应,使得生命的发展成为可能。 This produced a chain reaction,which made it possible for life to develop. 2.而当我试着向前迈步的时候,我发觉我被送出去很远,步子的跨度竟是在地球上的两倍,因而我摔倒了。 But when I tried to step forward,I found I was carried twice as far as on the earth and fell over.

　　No one knows exactly how the earth began.However,according to a 1.widely(wide) accepted theory,the universe began with a “Big Bang” that threw matter in all 2.directions(direction).For several billion years after the “Big Bang”,the earth was still just a cloud of dust.Between 4.5 and 3.8 billion years ago,the earth settled into a solid globe and became very 3.violent(violence).As the earth exploded with fire and rock,carbon dioxide,nitrogen,water vapour and other gases were produced in time,which were 4.to make(make) the earth’s atmosphere.What is even 5.more important is that water began to appear on earth,making it possible for life to develop.Many millions of years later,small plants 6.appearing(appear) on the surface of the water multiplied and filled the oceans and seas with oxygen,7.which encouraged the later development of early shellfish and all sorts of fish.Next,green plants began to grow on land,8.followed(follow) by insects and amphibians.When the plants grew into forests,reptiles appeared.After that,dinosaurs developed and existed on the earth for more than 140 million years.The dinosaurs’ 9.disappearance(disappear) made possible the rise of mammals.Finally,some clever animals 10.with hands and feet,such as human beings appeared and spread all over the earth.Thus,in their turn,they have become the most important animals on the planet.