2012 版英语一轮知识点学案：Unit4《Astronomythe science of the stars》（新人教版必修 3）Ⅰ.重点单词聚焦1．It cost him more than one________(十亿) dollars to complete the project.答案： billion2．“What happened？” John’s mother asked him in a________(温和的) voice.答案： gentle3．Before the Earth’s protective________(大气层) was formed，there was no life except in the sea.答案： atmosphere4．With the________(引力) of the moon and the sun each day，tides (潮汐) roll in and roll away.答案： pull5．Manmade________(卫星) are used for sending and receiving messages.答案： satellites6．Smoking________(乘，增加) the risk of heart attacks and other health problems.答案： multiplies7．Eating too many desserts can be________(有害的) to one’s teeth.答案： harmful8．Global warming and________(气候) change problems are perhaps the greatest threats to our planet.答案： climate9．According to the________(理论) of relativity (相对论)，nothing can travel faster than light.答案： theory10．Most of the evidence had been destroyed.________(因此，于是)，it was almost impossible to prove him guilty.答案： ThusⅡ.重点短语扫描1．prevent... ... from 阻止……2．lay eggs 下蛋3．In one’s turn 轮到某人；接着4．get the hang of 熟悉；掌握；理解15．watch out 密切注视；当心；提防6．depend on 依靠7 in time 及时，终于8．give birth to 产生；分娩9．cheer up 感到高兴；感到振奋10．now that 既然11．break out 突发；爆发Ⅲ.课文原句突破1．随后它会变成什么没有人知道，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。________ ________ ________ ________ ________was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe.答案： What it was to become 2．地球变得如此猛烈，以至于它的形状能否持久还不清楚。The earth became________violent________it was not clear whether the shape wo...
