高一英语必修3 Unit 4 Astronomy: the science of the stars人教试验版
【本讲教化信息】
一、教学内容
必修3 Unit 4 Astronomy: the science of the stars
（一）重点单词
健康英语
（二）重点短语
诸法
（三）重（难）点句型
二、学问精讲
祖国山河美如画（一）重点单词
1. system n.[c] 系统；体系；制度systematic adj.
He created a new system of teaching foreign languages.
他创建了一种新的外语教学体系。
The new system has had a disastrous effect on productivity.
新制度对生产率产生了灾难性的影响。
Too much alcohol is bad for the system.
过量饮酒对身体有害。
theory n.学说；理论theoretic adj.
There are many theories about the origin of life.
关于生命起源的学说有许多。
In this way they can better apply theory to practice.
这样他们就能更好地把理论运用到实践中去。
Your plan sounds fine in theory it doesn’t work in practice.
你的支配在理论上听起来不错，但在实践中无法实施。
2. violent adj. 猛烈的；激烈的；粗暴的 violence n.
They are launching a violent attack on the enemy.
他们对敌人绽开了猛烈的进攻。
The class was shocked by his violent language.
全班同学对他激烈的言辞感到震惊。
Children should not be allowed to watch violent movies.
不应允许儿童看暴力电影。
The young man was charged with robbery with violence.
这个年轻人被控暴力抢劫。
3. unlike
（1）prep. 与……不像，与……不同
Unlike his brother, he has a n of humor.
与他的兄弟不同，他很有幽默感。
It’s unlike you not to say hello.
连招呼都不打，这可不像是你（的作风）。
（2）adj. 不同的, 相异的, 不相像的
They give unlike accounts of the incident.
他们对这件事的描述各不相同。
4. fundamental adj. 基本的；基础的；必要的
There is a fundamental difference in attitude between the two politicians.
这两位政治家的看法有着根本区分。
Fresh air is fundamental to good health.
簇新空气对健康是不行缺少的。
5. harmful adj. 对……有害的harmless adj.
It is obvious that smoking is harmful to health.
很明显，吸烟对健康有害。
学问拓展
harm n. 损害, 危害, 损害；vt. (使)受到损害, 损害
Excessive drinking will be harmful to you. /do you harm. / do harm to you. / harm you.
过量饮酒对身体有害。
6. exist vi. 鳄鱼龟怎么养存在；生存 existence n. 存在
Man can’t exist without oxygen .人没有氧气就不能生存。
I can hardly exist on the wage I’ m getting.
我靠我挣的工资简直难以糊口。
There exists a good way to solve the existing problem.
有一个解决目前问题的好方法。
No one knows how this world came into existence。
没有人知道这个世界是怎样形成的。
7. puzzle
（1）n. 谜，难题；令人费解的事[人]
Their reason for doing it is still a puzzle to me.
他们为什么干那件事仍旧让我费解。
It’s a quite puzzle to us why he did it.
他为何做这样的事，我们完全搞不懂。
（2）vi. & vt. (使)迷惑；（使）犯难
What puzzled me was why they didn’t take her advice.
他们为什么不接受她的建议，这使我大惑不解。
梦回汉唐
学问拓展
puzzling 令人困惑的 puzzled 感到困惑的
We felt puzzled at the puzzling questions.
我们对这些令人困惑的问题感到茫然。
即学即用
① At last, I made up my mind to speak the truth ______of the whole class.
A. in the prent B. at the prent
C. in the prence D. at the prence
② They had a ______ quarrel and John stormed out.
A. violent B. cruel C. strong C. harmful
③ His new novel is ______all his previous ones.
A. unlike B. not likely C. unlikely D. likely
④ Judging from his ______look , this problem must be quite ______.
A. puzzling; puzzling B. puzzled; puzzled
C. puzzling; puzzled D. puzzled; puzzling
⑤ We don’t own the building. _____, it would be impossible for us to make any major changes to it.
A. Thus B. Yet C. Still D. Even
⑥ A strange virus struck my computer _____so that it broke down.
A. design B. system C. theory D. instrument
⑦ A truck went out of control and ______into the back of a bus.
A. cracked B. crashed C. broke D. burst
⑧ Scientists are not sure about the _____of water on Mars.
A. appearance B. existence 獐C. connection D. possibility
（二）重点短语
1. They were in time to produce carbon, nitrogen, water vapor and other gas, which were to make the earth’s atmosphere.
最终产生了碳、氮气、水蒸气和其他多种气体，从而形成了地球的大气层。
△ in time刚好；最终；迟早
If you keep on, you will succeed in time.
假如坚持下去，你迟早会胜利的。
The storm was to stop in time before the sports meeting.
暴风雨最终在运动会起先前停下来了。数字和数的区别
He managed to nd the tourists to the airport in time.
他设法把游客刚好送到了机场。
The doctor came in time to save his life.
医生刚好赶到救了他的命。
Will we be in time for the six o’clock train?
我们来得及赶上六点钟的那趟火车吗？
学问拓展
常与time搭配的短语还有
The company fired him for not coming to work on time.
那家公司因他不按时上班而解雇了他。
I’ll be back in no time.我立刻就回来。
Take the pills two at a time.每次服两粒。
He was at one time a professor in that university.
他一度是那所高校的教授。
Everyone may make mistakes at times.
每个人都会时常的犯错误。
They finished the work ahead of time.
他们提前完成了工作。
世界上最长的名字
She’s staying with her aunt for the time being.
她短暂住在她姨妈那里。
Take your time packing, for we still have one and a half hour.
渐渐整理你的行李, 我们还有一个半小时的时间。
2. Thus they have, in their turn , become the most important animals on the planet.
