unit 4Astronomy the science of the stars基础知识

Unit 4 Astronomy：the science of the starsPeriod 1 Grammar points.一．语法要点主语从句：在复合句中作主句的主语的从句叫主语从句。

引导主语从句的词有连词that, whether；连接代词who, what, which；连接副词when, where, how, why等。

Eg: Which team will win the match is still unknown.主语从句放在句首，句子常显得笨重，因此一般把它放到句子后面，前面用引导词”it”来作主语。

Eg: It’s strange that he didn’t come yesterday.二．重点难点1．Nobody knew that it was going to be different from other planets going to be different from other planets going round the sun.going round the sun 为现在分词短语定语，表示一般的动作。

Eg: Men breaking the law will be punished.现在分词短语，也可表示进行的动作2. Weather life will continue on the earth for millions of years to come will depend on whether this problem can be solved.for millions of years to come 中不定式to come 作定语，与前面的名词有逻辑上的主谓关系。

Eg: She is the last person to tell lies.3．The problem was that the earth became violent because it was not clear whether the solid shape was to last or not.The problem was that …, that 引导表语从句，that 只起连接作用，无意义，但不能省略。

Unit4 Astronomy:thescienceofthestarsⅠ.阅读理解AYou'd like to employ a person to help take your business to th e next level, but you may find that there are a large number of employment websites on the Internet. Which one is your best choice? Here are four websites (in no particular order) that ca n help you get into a pool of job applicants (申请人)．LinkedInAs you probably already know, LinkedIn is a site where job applicants post resumes (简历) and exchange ideas. The site has more than 135 million members, many of whom may be looking for a new position. The cost to post a job opening on LinkedIn depends on the ge ographic location of the position. For example, in the Greater Pittsburgh area, a 30day job posting costs $195.CraigslistCraigslist isn't just a place for finding an apartment or sellingyour old couch. The website has an area devoted to employ ment in big cities. Employers can post jobs to find suitable em ployees. Posting in some markets is free, but in others, it cost s $25 to $75.MonsterFounded in 1994, Monster has grown to one of the most popu lar employment websites. It offers pages of advice about care er management and employment searches. Monster also pro vides apps for mobile phones, making it more convenient for people to post their job openings. Job postings on Monster co st from $210 to $395.JobsterJobster users can create interesting online profiles (简介) containing information about employment and educational history. The site uses an active method in which employers c an contact interested applicants. Employers can post as many jobs as they want for only $75 per month.【文章大意】本文主要介绍了四个可靠的招聘网站。

Unit 4 Astronomy：the science of the stars 【美文阅读】关于大地起源的神话有许多许多，你了解多少呢？The sky and the earth were at first one blurred entity(混沌整体) like an egg. Then Pangu was born into it. The separation of the sky and the earth took eighteen thousand years. The yang which was light and pure rose to become the sky，and the yin which was heavy and murky(黑暗的)sank to form the earth. Between them was Pangu, who went through nine changes every day, his wisdom greater than that of the sky and his ability greater than that of the earth. Every day the sky rose ten feet higher, the earth became ten feet thicker, and Pangu grew ten feet taller. Another eighteen thousand years passed, and there was an extremely high sky, an extremely thick earth, and an extremelytall Pangu. After Pangu died, his head turned into the Five Sacred Mountains(Mount Tai, Mount Heng, Mount Hua, Mount Heng, Mount Song), his eyes turned into the moon and the sun, his blood changed into water in river and sea, his hair into grass. In all, the universe and Pangu combine in one.【诱思导学】1．Do you agree on the forming of the universe？Give your reasons.________________________________________________________________________________________________________________________________________________2．What kind of people is Pangu in your eyes?________________________________________________________________________________________________________________________________________________【答案】 1.No，I don't agree.Because the scientists have already found out how the universe formed.2．I think Pangu is very great and determined.He is a hero.Period ⅠPreviewing(教师用书独具)●教学目标本课时主要是通过学生对学案所给出的内容的学习，了解本课文中所出现的词汇，初步了解课文以及相关的背景知识，就下一堂课对课文的全面理解起到一个铺垫作用。

【高二】Unit 4 Astronomy：The science of the starsUnit 4 Astronomy：The science of the stars1. spreadvt.&vi. 展开,铺开;散布;扩大;延伸The bird spread its wings. 那只鸟展开了翅膀。

Flies spread disease. 苍蝇传播疾病。

常用结构:spread sth. with sth. 用……抹/涂/铺……spread ...on ...把……抹/涂/铺在……be spread for摆好（桌子）准备spread oneself\[口\]舒展四肢(躺下)spread out张开，伸开，铺开，展开，伸长高手过招单项填空Paper making began in China and to Europe.(2021•12•河南郑州检测)A. SpreadB. grewC. CarriedD. developed解析:选A。

句意为：造纸术起于中国，又传播到了欧洲。

spread传播。

2. methodn. 方法He has introduced a new method of teaching.他引进了一种新的方法。

What is the most effective method of birth control?控制出生率的最有效的方法是什么？联想拓展by this means=in this way=with this method用这种方法易混辨析method/meansmethod侧重“理论方法”，指做某事的具体步骤或程序。

a new teaching method一种新的方法means（单复数同形）侧重“通过手段”或“利用工具”去达到某种目的。

高手过招选词填空(method/means)（原创）①The quickest of travel is b y plane.②She has a very scientific of dealing with political problems.答案：①means②method3. harmfuladj. 有害的常用结构:do sb. harm/do harm to sb. 对某人有害mean no harm 无意伤害别人;没有恶意harm one’s image/reputation 损害某人的形象/名声do more harm than good 弊大于利There is no harm in (sb.?s) doing sth.=It does no harm (for sb.) to do sth. (某人) 做某事无害处 be harmful to 对……有害harm n.&v. 损害，伤害Smoking is harmful to your health. 吸烟有害健康。

Unit 4 Astronomy：the science of the stars 课文知识点解析Warming UpDiscuss in pairs which science subjects are part of medicine,biochemistry,geophysics or astronomy.分组讨论哪些科学科目是医学，生物化学，地理学或天文学的一部分。

in pairs=two at a time=in twos一次两个，两个一组e.g.Shoes and slippers are sold in pairs.鞋子都是论双卖的。

注意：in+数词/名词（数词/名词以复数形式）e.g.in threes and fours 三三两两的in groups 成群的思维拓展in在这里表示：以……数量/形式、形状等。

e.g.Tourists queue in thousands to see the tomb. 游客数以千计排着队看陵墓。

Reading1.The problem was that the earth became violent because it was not clearwhether the solid shape was to last or not.这一问题变得越来越不确定，因为这一球体形状是否能够维持尚未明朗。

(1)violent adj. 猛烈的；激烈的；强暴的a violent language 激烈的语言a violent storm 猛烈的风暴a violent 猛攻思维拓展violence n.［U］1.暴力，强暴2.猛烈，剧烈，强烈(2)whether...or not... “是……还是……”在这里是主语从句,它还可以引导宾语从句、表语从句、同位语从句和状语从句。

e.g.I don’t know whether he will agree with me.（宾语）我不知道他是否同意我的观点。

Unit 4 Astronomy: the Science of the Stars (B 3) Section 1 Warming Up, Reading & Comprehending重点知识精讲一、重点单词1. science n.⑴[U] 科学；自然科学the law of science 科学规律new developments in science technology 科学技术的新发展⑵[C;U] 自然科学学科to study one of the science 攻读一门自然科学⑶[sing] （尤指人文、社会）学科；学Is there an adequate basis for a science of international policies. 国际政治作为一门学科是否有足够的基础。

【知识拓展】scientific adj. 科学（上）的；关于科学的；有系统的；有条理的scientist n. 科学家scientifically adv. 科学上；合乎科学地science fiction 科幻小说（或影片等）science park 科技园区2. system n.⑴（思想或理论）体系；方法；制度；体制He wrote an article on the British educational system. 他写了一篇关于英国教育制度的文章。

What do you think of the new system for assessing personal tax bill? 你认为这种新的个人税收评估制度怎么样？⑵系统The transport system needs to be improved 运输系统需要改进。

【知识拓展】systematic adj. 系统的；成体系的；有条理的systematically adv. 有步骤地；成体系地；系统地systematize vt. 使系统化；使成体系the system 沿袭已久的方法、做法或规则get sth. out of one’s system 宣泄；排解；消解（强烈的感情或欲望）3. violent adj.⑴使用暴力的；暴力引起的（尤指非法的）Students were involved in violent clashes with the police. 学生和警察发生了暴力冲突。

Unit 4Astronomy: the science of the starsⅠ.单项填空1．—I was trying to carry out the plan, but I failed.—Well, you________，for we were uncertain it would do________.A．needn't do that；in factB．needn't have done；in effectC．needn't have；in practiceD．needn't；in time答案C[needn't have done 没有必要做某事而做了，为避免重复，答语中可省略动词，只保留助动词have。

in fact＝in effect，实际上；in practice在实践中；in time 及时；迟早。

句意：——我试图实施这计划，但我失败了。

——哦，你本没有必要那么做，因为我们不确定在实践中它是否有效。

]2．Tom has agreed to let me use his computer to surf the Internet, and________I' m treating him to a good dinner at the newly-built restaurant just around the corner.A．in charge B．in placeC．in return D．in turn答案C[考查介词短语的辨析。

in charge负责；掌管；in place在适当的位置；in return 做为回报；in turn反过来。

句意：汤姆同意我让我用他的电脑上网，做为回报，我要在拐角处新开的饭馆请他好好吃一顿。

]3．We should do what we have to do________we can do what we want to do in the future.A．so that B．in caseC．for fear that D．now that答案A[考查状语从句的连接词。