Unit4 Scientists who changed the world Extended reading(分层练习) -【上好课】2024-2025学年高一英语同步精品课堂（译林版2020必修第三册）

2025学年高一年级英语同步精品课堂（译林版） Unit 4 Scientists who changed the world Extended reading（解析版） 一、课本原文阅读 The Value of Science When I was younger, I thought science would make good things for everybody. It was obviously useful; it was good. But then during the war I worked on the atomic bomb. This result of science was obviously very serious — it represented the destruction of people and it put our future at risk. I had to ask myself, “Is there some evil involved in science?” Put another way, what is the value of the science I had long devoted myself to — the thing I had loved — when I saw what terrible things it could do? It was a question I had to answer. I thought long and hard about this question, and I will try to answer it in this talk. The first way in which science is of value is familiar to everyone: scientific knowledge enables us to do and make all kinds of things. Of course, if we make good things, it is not only to the credit of science; it is also to the credit of the moral choice which led us to good work. Scientific knowledge is an enabling power to do either good or bad — but it does not carry instructions on how to apply it. Such power has obvious value — even though the power may be negated by what one does with it. Another value of science is the intellectual enjoyment it can provide us with. When we look at any question deeply enough, we feel the excitement and mystery coming to us again and again. With more knowledge comes a deeper, more wonderful mystery, inspiring one to look deeper still. Never concerned that the answer may let us down, with pleasure and confidence we turn over each new stone to find unimagined strangeness leading on to more wonderful questions and mysteries. Thanks to the scientific effort, we have been led to imagine all sorts of things more fantastic than poets and dreamers of the past ever could. I would now like to turn to a third value that science has. The scientist has a lot of experience with ignorance and doubt and uncertainty, and this experience is of very great importance. When a scientist doesn’t know the answer to a problem, he is ignorant. When he has an idea as to what the result is, he is uncertain. And when he is pretty sure of what the result is going to be, he is still in some doubt. Now, we scientists take it for granted that it is perfectly possible to live and not know. But our freedom to doubt was born out of a deep and strong struggle against authority in the early days of science. In order to progress, we must not forget the importance of this struggle; we must recognize our ignorance and leave room for doubt. Permit us to question — to doubt — to not be sure. It is our responsibility as scientists, knowing the great progress that is the fruit of freedom of thought, to declare the value of this freedom; to teach how doubt is not to be feared but to be welcomed and discussed; and to demand this freedom as our duty to all coming generations. (Adapted from a public lecture by Richard Feynman, an American scientist who won the Nobel Prize in Physics in 1965) 1． 2． 3． 4． 5． 6． 7． 8． 9． 10． 【答案】 1．Introduction 2．involved in science 3．value of science 4．Three 5．Scientific knowledge 6．Intellectual enjoyment 7．Experience with ignorance and doubt and uncertainty 8．Conclusion 9．recognize our ignorance 10．how doubt is not to be feared but to be welcomed and discussed 【导语】本文是一篇演讲稿。本文是美国物理学家、1965年诺贝尔物理学奖得主理查德·费曼在一次公开演讲中改编的内容，主要概括了科学的价值。 1．考查推理判断。根据第一段中“When I was younger, I thought science would make good things for everybody. It was obviously useful; it was good. But then during the war 1 worked on the atomic bomb. This result of science was obviously very serious — it represented the destruction of people and it put our future at risk. l had to ask myself, “Is there some evil involved in science?”(当我年轻的时候，我认为科学会给每个人带来好处。这显然是有用的；很好。但在战争期间，我研究了原子弹。这个科学的结果显然是非常严重的——它代表了人类的毁灭，它把我们的未来置于危险之中。我不得不问自己：“科学中有邪恶吗？”)”可知，第一段通过描述作者个人研究原子弹的经历，结合提问的方式引出文章的主题，即科学的价值。故第一空是引出文章主题。表示“引出文章主题”用introduction to the topic。故答案为Introduction。 2．考查细节理解。根据第一段中“I had to ask myself, “Is there some evil involved in science?”(我不得不问自己，“科学中有邪恶吗？”)”可知，此处作者疑问“科学中有邪恶吗？”，表示“科学中有邪恶吗”用some evil involved in science。故答案为involved in science。 3．考查细节理解。根据第一段中“I had to ask myself, “Is there some evil involved in science?”(我不得不问自己，“科学中有邪恶吗？”)”可知，此处作者疑问“科学中有邪恶吗？”由此引出下文，引发读者思考，根据第二段中“Put another way, what is the value of the science I had long devoted myself to — the thing I had loved — when I saw what terrible things it could do? (换句话说，我长期致力于的科学——我所热爱的东西——在我看到它能造成的可怕后果时，它的价值何在？)”即作者探讨的事“科学的价值”。表示“科学的价值”用value of science。故答案为value of science。 4．考查细节理解。根据第三段中“The first way in which science is of value is familiar to everyone: scientific knowledge enables us to do and make all kinds of things.(科学价值的第一种方式是大家所熟悉的：科学知识使我们能够做和制造各种各样的东西。)”以及第四段中“Another value of science is the intellectual enjoyment it can provide us with.(科学的另一个价值是它能为我们提供智力上的享受。)”以及第五段中“I would now like to turn to a third value that science has. The scientist has a lot of experience with ignorance and doubt and uncertainty, and this experience is of very great importance.(现在我想谈谈科学的第三个价值。科学家有很多无知、怀疑和不确定的经验，这些经验是非常重要的。)”可知，作者从三方面谈论科学的价值。故答案为Three。 5．考查主旨大意。根据第三段中“The first way in which science is of value is familiar to everyone: scientific knowledge enables us to do and make all kinds of things.(科学价值的第一种方式是大家所熟悉的：科学知识使我们能够做和制造各种各样的东西。)”可知，科学价值的第一个方面体现在科学知识使我们能够做和制造各种各样的东西即强调的是科学知识。故答案为Scientific knowledge。 6．考查主旨大意。第四段中“Another value of science is the intellectual enjoyment it can provide us with.(科学的另一个价值是它能为我们提供智力上的享受。)”可知，科学价值的第二个方面是为人类提供智力上的享受。故答案为Intellectual enjoyment。 7．考查主旨大意。第五段中“I would now like to turn to a third value that science has. The scientist has a lot of experience with ignorance and doubt and uncertainty, and this experience is of very great importance.(现在我想谈谈科学的第三个价值。科学家有很多不了解的、怀疑和不确定的经验，这些经验是非常重要的。)”可知，科学价值的第三个方面是科学家有很多不了解的、怀疑和不确定的经验，这种经验是科学的第三个价值。故答案为Experience with ignorance and doubt and uncertainty。 8．考查主旨大意。根据倒数第二段中“But our freedom to doubt was born out of a deep and strong struggle against authority in the early days of science. In order to progress, we must not forget the importance of this struggle; we must recognize our ignorance and leave room for doubt. Permit us to question — to doubt — to not be sure.(但是，我们怀疑的自由是在科学早期与权威的深刻而强烈的斗争中产生的。为了进步，我们不能忘记这个斗争的重要性；我们必须认识到自己的无知，给怀疑留下余地。请允许我们质疑——怀疑——不确定。)”以及最后一段中“It is our responsibility as scientists, knowing the great progress that is the fruit of freedom of thought, to declare the value of this freedom; to teach how doubt is not to be feared but to be welcomed and discussed; and to demand this freedom as our duty to all coming generations.(作为科学家，我们深知思想自由带来的巨大进步，因此我们有责任宣扬这种自由的价值；我们要教导人们不要害怕怀疑，而应欢迎并讨论怀疑；我们要求这种自由，并将其视为我们对所有后代所负有的责任。)”可知，此处强调人类应该保有对怀疑的自由，为怀疑的自由留有余地，这样才能带来巨大的进步。因此最后两段是对前文的总结，提出文章的结论：人类要提出问题——持有怀疑——去保持不确定性，这样才能推动社会的进步。表示“结论”用conclusion。故答案为Conclusion。 9．考查细节理解。根据倒数第二段中“In order to progress, we must not forget the importance of this struggle; we must recognize our ignorance and leave room for doubt. Permit us to question — to doubt — to not be sure.(为了进步，我们不能忘记这个斗争的重要性；我们必须认识到自己的无知，给怀疑留下余地。请允许我们质疑——怀疑——不确定。)”可知，作者认为，为了进步人类不能忘记这个斗争的重要性；必须认识到自己的无知，给怀疑留下余地，此处表示“承认我们的无知”用recognize our ignorance。故答案为recognize our ignorance。 10．考查细节理解。根据最后一段中“It is our responsibility as scientists, knowing the great progress that is the fruit of freedom of thought, to declare the value of this freedom; to teach how doubt is not to be feared but to be welcomed and discussed; and to demand this freedom as our duty to all coming generations.(作为科学家，我们深知思想自由带来的巨大进步，因此我们有责任宣扬这种自由的价值；我们要教导人们不要害怕怀疑，而应欢迎并讨论怀疑；我们要求这种自由，并将其视为我们对所有后代所负有的责任。)”可知，作者强调人类应该深知思想自由带来的巨大进步，因此有责任去宣扬自由的价值；教导人们不要害怕怀疑，应该欢迎并讨论怀疑；以及将思想自由视为人类对所有后代所付的责任。此处表示“教导人们不要害怕怀疑，而应欢迎并讨论怀疑，而应欢迎并讨论怀疑”用to teach how doubt is not to be feared but to be welcomed and discussed。故答案为how doubt is not to be feared but to be welcomed and discussed。 阅读理解 （一） Who says inventions are only made by grown-ups and professionals? Over the years, children have also succeeded in making their useful contributions to the world. Here are a few inventions that came to life from the minds of young children. Hero Helmet Seven-year-old Samuel Meyer’s invention is aimed at stopping people from riding their bikes or skateboards without using a helmet. The Hero Helmet features an inbuilt remote that controls a lock on the wheels which unlocks when the Helmet is being worn by the rider. Samuel says: no helmet, no bike. Robotic Earthworm The first thought that comes to mind is, why a robotic earthworm? Well, ten-year-old David Cohen had some useful applications in mind. He believed it could be used to find victims after a flood, earthquake or fire. The robot could get into small and dangerous places where search dogs and humans could not go. B．E. A．C． O. N. Fifteen-year-old Hannah Herbst’s invention, which stands for Bringing Electricity Access to Countries through Ocean Energy, was inspired by her pen pal who lives in Ethiopia and did not have access to lights. So she came up with B．E. A．C． O. N, which absorbs energy directly from ocean waves. Her invention won the “Discovery Education 3M Young Scientist Challenge” in 2015 and other numerous awards. Portable Wheelchair Controller At only eight years old, Amelia Fox created the invention to help lift people in and out of their wheelchair. This invention was not just born out of the desire to create something. Amelia developed this controller for her brother, who had just got hip surgery and needed the wheelchair to move around. 1．Who is the youngest inventor? A．Samuel Meyer. B．David Cohen. C．Amelia Fox. D．Hannah Herbst. 2．Which of the following can be used as a rescue tool? A．Hero Helmet B．B．E. A．C． O. N. C．Robotic Earthworm. D．Portable Wheelchair Controller. 3．Why did Amelia Fox create the invention? A．To give her brother assistance. B．To benefit the earthquake victims. C．To generate electricity effectively. D．To protect bike riders from injuries. 【答案】1．A 2．C 3．A 【导语】本文是一篇应用文。主要介绍了几项儿童的发明。 1．细节理解题。由第二段第一句“Seven-year-old Samuel Meyer’s invention is aimed at stopping people from riding their bikes or skateboards without using a helmet.( 7岁的塞缪尔·迈耶的发明旨在阻止人们不戴头盔骑自行车或滑板。)”，第三段第二句“Well, ten-year-old David Cohen had some useful applications in mind.( 嗯，十岁的David Cohen脑中有一些有用的应用。)”，第四段第一句“Fifteen-year-old Hannah Herbst’s invention, which stands for Bringing Electricity Access to Countries through Ocean Energy, was inspired by her pen pal who lives in Ethiopia and did not have access to lights.( 15岁的Hannah Herbst的发明代表着通过海洋能源将电力输送到各国，她的灵感来自她的笔友，她住在埃塞俄比亚，没有电灯。)”，和最后一段中的“At only eight years old, Amelia Fox created the invention to help lift people in and out of their wheelchair.(年仅八岁的Amelia Fox发明了这项发明，帮助人们上下轮椅。)”综上可知Samuel Meyer是最年轻的发明家。故选A项。 2．细节理解题。由第三段的“He believed it could be used to find victims after a flood, earthquake or fire. The robot could get into small and dangerous places where search dogs and humans could not go.( 他相信它可以用来寻找洪水、地震或火灾后的受害者。机器人可以进入搜救犬和人类无法进入的小而危险的地方。)”可知，Robotic Earthworm可以用作救援工具，去拯救受灾者。故选C项。 3．推理判断题。由最后一段第二句“This invention was not just born out of the desire to create something. Amelia developed this controller for her brother, who had just got hip surgery and needed the wheelchair to move around.(这项发明并不仅仅是出于创造的欲望。阿米莉亚为她的弟弟开发了这个控制器，她的弟弟刚刚做了髋关节手术，需要轮椅来活动)”可知，是因为Amelia的弟弟做了髋关节手术，需要轮椅来走动，她想帮助弟弟，才发明了Portable Wheelchair Controller。故选A项。 （二） “The moment before they called my name, I was really nervous because the other finalists’ presentations are really good and I thought they would win,” Kara Fan, 14, who has won America’ s Top Young Scientist, told Yahoo Finance. “When they announced my name, I was really surprised actually.” To win that claim, Fan’ s nano-particle liquid bandage had to surpass the experiments of hundreds of fifth to eighth graders as well as nine other finalists. Fan started developing her liquid bandage in April 2019 to fight the overuse of antibiotics (抗生素). According to the CDC, roughly 2 million people every year suffer a bacterial infection in the U. S. and about 23, 000 passed away as a result. If left alone, a UN study reported, drug- resistant diseases or the “superbug” could lead to 10 million deaths across the globe by 2050. When Fan’ s sprayable bandage dries on a person’ s skin, it creates a thin layer that protects the wounded area while breaking the cell wall and killing the bacteria on the skin. After experimenting with copper nitrate (硝酸铜) to fight bacteria, switching to the silver nitrate ended up being the major catalyst (催化剂) to seeing results for her award-winning project. “Thousands of years ago, ancient people would use copper and silver to eat with and they would drink water from like copper bowls to kill bacteria,” Fan explained. “I found out that it didn’t work. So I used nano silver.” Sir Alexander Fleming’ s discovery of penicillin— a type of antibiotic— is Fan’ s favorite scientific discovery. That said, she doesn’ t think humans should rely too heavily on penicillin. Following her years at Westview High School, Fan hopes to continue her biology track at Stanford University. Along with the ＄ 25, 000 cash prize she won on October 29, becoming America’ s Top Young Scientist may help get the private university’ s attention. 4．How did Kara Fan feel about her winning the prize? A．Confident. B．Regretful. C．Proud. D．Unexpected. 5．For what purpose did Fan develop her liquid bandage? A．To fight overuse of antibiotics. B．To enter a national contest. C．To reduce deaths from injuries. D．To get into a good university. 6．Which of the following does Fan use to kill bacteria? A．Copper nitrate. B．Copper. C．Silver. D．Nano silver. 7．What might be Fan’ s opinion about penicillin? A．Addictive. B．Valuable. C．Useless. D．Irreplaceable. 【答案】4．D 5．A 6．D 7．B 【导语】本文是一篇记叙文，讲述了美国最佳青年科学家奖的卡拉·范发明液体绷带的故事。 4．细节理解题。根据第一段“When they announced my name, I was really surprised actually.(当他们宣布我的名字时，我真的很惊讶)”可知，卡拉·范对自己的获奖感到很意外。故选D项。 5．细节理解题。根据第二段“Fan started developing her liquid bandage in April 2019 to fight the overuse of antibiotics (抗生素).(2019年4月，范开始研发液体绷带，以对抗抗生素的过度使用)”可知，卡拉·范于2019年4月开始发明液体绷带，以对抗抗生素的过度使用。故选A项。 6．细节理解题。根据倒数第三段““Thousands of years ago, ancient people would use copper and silver to eat with and they would drink water from like copper bowls to kill bacteria,” Fan explained. “I found out that it didn’t work. So I used nano silver.”(“几千年前，古人会用铜和银来吃饭，他们会用铜碗喝水来杀菌，”范解释说。“我发现这行不通。所以我使用了纳米银。”)”可知，范主用纳米银来杀菌。故选D项。 7．推理判断题。根据倒数第二段“Sir Alexander Fleming’ s discovery of penicillin— a type of antibiotic— is Fan’ s favorite scientific discovery. That said, she doesn’ t think humans should rely too heavily on penicillin.(亚历山大·弗莱明爵士发现青霉素——一种抗生素——是范最喜欢的科学发现。也就是说，她认为人类不应该过度依赖青霉素)”可知，亚历山大弗莱明发现的青霉素是范最喜欢的科学发现，由此可知，范认为青霉素是有价值的。故选B项。 七选五阅读 Do you have a hobby? Something you look forward to spending your time with? Something you love to do? It could be collecting something, or making model airplanes. It could be sketching or making useful things out of waste material. 1 or singing and dancing. Apart from an enjoyable time, 2 . Sashay was a shy boy but through his interest in model airplanes he learned the value of sticking to a task until it was finished. His model airplane club brought him to get into touch with similar souls. He learned to make friends for the first time. Having a hobby helps you relax and get away from the routines of school. It gives you a break. You really need this well deserved one, too! It gives you focus, self dependence, confidence and builds your personality. This is an opportunity to lose yourself in an enjoyable activity, away from the pressure of school. 3 . Your hobby defines you. 4 . And it also shows you what you are good at, and how far you can go, when you apply yourself. So go ahead. 5 . For a hobby is: Happiness: something which you look forward to doing. Opportunity: to nurture and develop your special and unique skills and celebrate them. Believe in yourself: to make you understand your strong advantages and improve your confidence. Best in you: brings out your best — for in each one of us there is a best that is only ours. YOU gives you a unique character, and makes you YOU! A．It showcases your special skills B．It could be a musical instrument that you love playing C．Develop a hobby D．It proves your ability E．At the end of it, you feel relaxed and yet, mentally charged F．there are many things that a hobby can give you G．Hobbies show your character 【答案】1．B 2．F 3．E 4．A 5．C 【导语】这是一篇议论文。文章论述了业余爱好的诸多好处，并呼吁人们培养一个好爱。 1．上文It could be collecting something, or making model airplanes. It could be sketching or making useful things out of waste material.(它可以是收集东西，或者制作飞机模型。它可以是把废旧材料折叠或制作成有用的东西)与B. It could be a musical instrument that you love playing(它可以是你喜欢演奏的乐器)承接自然，上下文都讲述了什么是爱好，且构成明显的并列关系，故选B项。 2．上文Apart from an enjoyable time(除了快乐的时光)与F. there are many things that a hobby can give you(一个好爱可以给你很多东西)承接自然，上下文都讲述爱好可以给我们带来很多乐趣，包括快乐时光，故选F项。 3．上文This is an opportunity to lose yourself in an enjoyable activity, away from the pressure of school.(这是一个让你自己沉浸于快乐活动的机会，远离学校的压力)与E. At the end of it, you feel relaxed and yet, mentally charged(最后，你会感到放松，同时也充满了精神)承接自然，因为远离的学校的压力，所以可以得到放松，并再次精神饱满，故选E项。 4．下文And it also shows you what you are good at, and how far you can go, when you apply yourself.(它会告诉你你擅长什么，你能走多远，你什么时候可以应用自己)与A. It showcases your special skills(它展示你的特殊才能)承接自然，上下文是明显的并列关系，showcase和show是关键词，故选A项。 5．上文So go ahead.(所以去吧)与C. Develop a hobby(培养一个爱好)承接自然，上下文结合在一起就是鼓励人们培养一个爱好，故选C项。 1 / 9 学科网（北京）股份有限公司 $$ 2025学年高一年级英语同步精品课堂（译林版） Unit 4 Scientists who changed the world Extended reading（原卷版） 一、课本原文阅读 The Value of Science When I was younger, I thought science would make good things for everybody. It was obviously useful; it was good. But then during the war I worked on the atomic bomb. This result of science was obviously very serious — it represented the destruction of people and it put our future at risk. I had to ask myself, “Is there some evil involved in science?” Put another way, what is the value of the science I had long devoted myself to — the thing I had loved — when I saw what terrible things it could do? It was a question I had to answer. I thought long and hard about this question, and I will try to answer it in this talk. The first way in which science is of value is familiar to everyone: scientific knowledge enables us to do and make all kinds of things. Of course, if we make good things, it is not only to the credit of science; it is also to the credit of the moral choice which led us to good work. Scientific knowledge is an enabling power to do either good or bad — but it does not carry instructions on how to apply it. Such power has obvious value — even though the power may be negated by what one does with it. Another value of science is the intellectual enjoyment it can provide us with. When we look at any question deeply enough, we feel the excitement and mystery coming to us again and again. With more knowledge comes a deeper, more wonderful mystery, inspiring one to look deeper still. Never concerned that the answer may let us down, with pleasure and confidence we turn over each new stone to find unimagined strangeness leading on to more wonderful questions and mysteries. Thanks to the scientific effort, we have been led to imagine all sorts of things more fantastic than poets and dreamers of the past ever could. I would now like to turn to a third value that science has. The scientist has a lot of experience with ignorance and doubt and uncertainty, and this experience is of very great importance. When a scientist doesn’t know the answer to a problem, he is ignorant. When he has an idea as to what the result is, he is uncertain. And when he is pretty sure of what the result is going to be, he is still in some doubt. Now, we scientists take it for granted that it is perfectly possible to live and not know. But our freedom to doubt was born out of a deep and strong struggle against authority in the early days of science. In order to progress, we must not forget the importance of this struggle; we must recognize our ignorance and leave room for doubt. Permit us to question — to doubt — to not be sure. It is our responsibility as scientists, knowing the great progress that is the fruit of freedom of thought, to declare the value of this freedom; to teach how doubt is not to be feared but to be welcomed and discussed; and to demand this freedom as our duty to all coming generations. (Adapted from a public lecture by Richard Feynman, an American scientist who won the Nobel Prize in Physics in 1965) 1． 2． 3． 4． 5． 6． 7． 8． 9． 10． 阅读理解 （一） Who says inventions are only made by grown-ups and professionals? Over the years, children have also succeeded in making their useful contributions to the world. Here are a few inventions that came to life from the minds of young children. Hero Helmet Seven-year-old Samuel Meyer’s invention is aimed at stopping people from riding their bikes or skateboards without using a helmet. The Hero Helmet features an inbuilt remote that controls a lock on the wheels which unlocks when the Helmet is being worn by the rider. Samuel says: no helmet, no bike. Robotic Earthworm The first thought that comes to mind is, why a robotic earthworm? Well, ten-year-old David Cohen had some useful applications in mind. He believed it could be used to find victims after a flood, earthquake or fire. The robot could get into small and dangerous places where search dogs and humans could not go. B．E. A．C． O. N. Fifteen-year-old Hannah Herbst’s invention, which stands for Bringing Electricity Access to Countries through Ocean Energy, was inspired by her pen pal who lives in Ethiopia and did not have access to lights. So she came up with B．E. A．C． O. N, which absorbs energy directly from ocean waves. Her invention won the “Discovery Education 3M Young Scientist Challenge” in 2015 and other numerous awards. Portable Wheelchair Controller At only eight years old, Amelia Fox created the invention to help lift people in and out of their wheelchair. This invention was not just born out of the desire to create something. Amelia developed this controller for her brother, who had just got hip surgery and needed the wheelchair to move around. 1．Who is the youngest inventor? A．Samuel Meyer. B．David Cohen. C．Amelia Fox. D．Hannah Herbst. 2．Which of the following can be used as a rescue tool? A．Hero Helmet B．B．E. A．C． O. N. C．Robotic Earthworm. D．Portable Wheelchair Controller. 3．Why did Amelia Fox create the invention? A．To give her brother assistance. B．To benefit the earthquake victims. C．To generate electricity effectively. D．To protect bike riders from injuries. （二） “The moment before they called my name, I was really nervous because the other finalists’ presentations are really good and I thought they would win,” Kara Fan, 14, who has won America’ s Top Young Scientist, told Yahoo Finance. “When they announced my name, I was really surprised actually.” To win that claim, Fan’ s nano-particle liquid bandage had to surpass the experiments of hundreds of fifth to eighth graders as well as nine other finalists. Fan started developing her liquid bandage in April 2019 to fight the overuse of antibiotics (抗生素). According to the CDC, roughly 2 million people every year suffer a bacterial infection in the U. S. and about 23, 000 passed away as a result. If left alone, a UN study reported, drug- resistant diseases or the “superbug” could lead to 10 million deaths across the globe by 2050. When Fan’ s sprayable bandage dries on a person’ s skin, it creates a thin layer that protects the wounded area while breaking the cell wall and killing the bacteria on the skin. After experimenting with copper nitrate (硝酸铜) to fight bacteria, switching to the silver nitrate ended up being the major catalyst (催化剂) to seeing results for her award-winning project. “Thousands of years ago, ancient people would use copper and silver to eat with and they would drink water from like copper bowls to kill bacteria,” Fan explained. “I found out that it didn’t work. So I used nano silver.” Sir Alexander Fleming’ s discovery of penicillin— a type of antibiotic— is Fan’ s favorite scientific discovery. That said, she doesn’ t think humans should rely too heavily on penicillin. Following her years at Westview High School, Fan hopes to continue her biology track at Stanford University. Along with the ＄ 25, 000 cash prize she won on October 29, becoming America’ s Top Young Scientist may help get the private university’ s attention. 4．How did Kara Fan feel about her winning the prize? A．Confident. B．Regretful. C．Proud. D．Unexpected. 5．For what purpose did Fan develop her liquid bandage? A．To fight overuse of antibiotics. B．To enter a national contest. C．To reduce deaths from injuries. D．To get into a good university. 6．Which of the following does Fan use to kill bacteria? A．Copper nitrate. B．Copper. C．Silver. D．Nano silver. 7．What might be Fan’ s opinion about penicillin? A．Addictive. B．Valuable. C．Useless. D．Irreplaceable. 七选五阅读 Do you have a hobby? Something you look forward to spending your time with? Something you love to do? It could be collecting something, or making model airplanes. It could be sketching or making useful things out of waste material. 1 or singing and dancing. Apart from an enjoyable time, 2 . Sashay was a shy boy but through his interest in model airplanes he learned the value of sticking to a task until it was finished. His model airplane club brought him to get into touch with similar souls. He learned to make friends for the first time. Having a hobby helps you relax and get away from the routines of school. It gives you a break. You really need this well deserved one, too! It gives you focus, self dependence, confidence and builds your personality. This is an opportunity to lose yourself in an enjoyable activity, away from the pressure of school. 3 . Your hobby defines you. 4 . And it also shows you what you are good at, and how far you can go, when you apply yourself. So go ahead. 5 . For a hobby is: Happiness: something which you look forward to doing. Opportunity: to nurture and develop your special and unique skills and celebrate them. Believe in yourself: to make you understand your strong advantages and improve your confidence. Best in you: brings out your best — for in each one of us there is a best that is only ours. YOU gives you a unique character, and makes you YOU! A．It showcases your special skills B．It could be a musical instrument that you love playing C．Develop a hobby D．It proves your ability E．At the end of it, you feel relaxed and yet, mentally charged F．there are many things that a hobby can give you G．Hobbies show your character 1 / 5 学科网（北京）股份有限公司 $$