What will power your house in the future？Nuclear，wind，or solar power？According to scientists at the Massachusetts Institute of Technology(MIT)in the US，it might be leaves—but artificial(人造的)ones.
Natural leaves are able to change sunlight and water into energy. It is known as photosynthesis(光合作用)．Now researchers have found a way to imitate this seemingly simple process.
The artificial leaf developed by Daniel Nocera and his colleagues at MIT can be seen as a special silicon chip with catalysts(催化剂)．Similar to natural leaves，it can split water into hydrogen and oxygen when put into a bucket of water. The hydrogen and oxygen gases are then stored in a fuel cell，which uses those two materials to produce electricity，located either on top of a house or beside the house.
Though the leaf is only about the shape of a poker card，scientists claimed that it is promising to be an inexpensive source of electricity in developing countries.“ One can imagine villages in India and Africa not long from now purchasing an affordable basic power system based on this technology，”said Nocera at a conference of the American Chemical Society.
The artificial leaf is not a new idea. The first artificial leaf was invented in 1997 but was too expensive and unstable for practical use. The new leaf，by contrast，is made of cheap materials，easy to use and highly stable. In laboratory studies，Nocera showed that an artificial leaf prototype(原型)could operate continuously for at least 45 hours without a drop in activity.
The wonderful improvements come from Nocera's recent discovery of several powerful，new and inexpensive catalysts. These catalysts make the energy transformation inside the leaf more efficient with water and sunlight. Right now，the new leaf is about 10 times more efficient at carrying out photosynthesis than a natural one. Besides，the device can run in whatever water is available；that is，it doesn't need pure water. This is important for some countries that don't have access to pure water.
With the goal to “make each home its own power station” and “give energy to the poor”，scientists believe that the new technology could be widely used in developing countries，especially in India and rural China.
1.Which of the following orders correctly shows how the artificial leaf is used to produce electricity?
a．artificial leaves split water into hydrogen and oxygen
b．the hydrogen and oxygen gases are stored in a fuel cell
c．the artificial leaves are put in water
d．the fuel cell uses hydrogen and oxygen to produce electricity
A．c，b，a，d B．c，a，b，d
C．b，c，a，d D．c，a，d，b
2.The purpose of the scientists at MIT in developing the new artificial leaf is to________.
A．build up more power stations in the world
B．provide cheaper energy for developing countries
C．offer people in developing countries access to pure water
D．gain a deeper understanding of the photosynthesis process
3.The main idea of this passage is ________.
A．an introduction to the history of artificial leaves
B．an invention copying photosynthesis
C．giving energy to the poor
D．a mixture of water power and solar energy
初中学业考试导与练系列答案科目：高中英语 来源：2015-2016学年河南周口中英文学校高二下学期第一次月考英语试卷（解析版） 题型：七选五
根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。其中两项为多余选项
The Winner’s Guide to Success
How do successful people think? What helps them to make success? To find out the answers, an American scholar recently visited some of the most successful people in America. 1.
Be responsible for yourself
Sometimes you may want to blame others for your failure to get ahead. 2. You’re saying, “You have more control over my life than I do.”
Live life “on purpose”
Almost all successful people live life “on purpose”— they are doing what they believe they should and want to do. When you live your life on purpose, you’ll try your best to do your job or study as well as you can. You love what you do and you can find pleasure in what you do.
Write a plan
It is very difficult trying to get what you want without a good plan. 3. A good plan is like a map to you. Without this “map”, you may waste your time, money and also your energy; while with the “map” you’ll enjoy the “trip” and get what you want in the shortest possible time.
Be willing to pay the price
Nothing great is easy to get. So you must be ready to work hard — even harder than you have ever done. If you are not willing to pay the price, you won’t get anything valuable.
Never give up
4. When you are doing something, you must tell yourself again and again: Giving up is worse than failure because failure can be the mother of success, but giving up means the death of hope.
5.
Once an American writer was writing a novel. He could not have a good ending for his book until one night when he had a very good idea. He was so excited that he made a phone call to one of his best friends. “I’ve got a perfect idea,” he said, “I’ll put it down later and show it to you.” But he never did, because he died that night. His book was left without a perfect ending. So remember, do what you can right away. Never delay at all.
A. It is just like trying to drive through strange roads to a city far away.
B. It seems to us that everyone knows this. But it is easier said than done.
C. Some people achieve success much later in life because they fail to realize earlier the importance of hard work.
D. In fact, when you say someone or something outside of yourself is stopping you from making success, you’re giving away your own power.
E. Someone else’s opinion of you doesn’t have to become your reality.
F. Don’t delay
G. Here are some keys to success that they give.
查看答案和解析>>
科目：高中英语 来源：2016届内蒙古巴彦淖尔杭锦后旗奋斗中学高三下模拟2英语卷（解析版） 题型：语法填空
语法填空,阅读下面材料，在空白处填入适当的内容（1个单词）或括号中单词的正确形式。
We all get affected by advertisements in magazines and on radio and television. They promise us and make us believe1. we can buy ideal things with our money.
However, many products. 2. promise to help us realize our dreams, turn out to be of little effect. Their purpose is to persuade the buyer to spend more. Well, knowing the 3. (true) does not stop the victims from 4._______ (attract) by media stunts (噱头)!
Though we are fully aware 5. the artful devices of a toothpaste company, we enjoy the color and pictorial values that we see. Many companies make these pictures with artful imagination. A short film with a simple story and colorful atmosphere6. (create) the desired effect without using many words. Some of 7. best advertisements have even won international praise.
The present age is an age of advertisement. All big and small companies depend on some kind of techniques 8. (catch) a market for their products. Advertising may be make-believe, but it is here to stay. Industries grow 9.________ (extreme) fast and markets are flooded with new products every day. Therefore, 10.________ is necessary that there be some code of ethics (道德准则) to prevent producers making goods below standard and cheating the public.
查看答案和解析>>
科目：高中英语 来源：2016届湖南长沙明德中学高三下学期第八次月考英语试卷（解析版） 题型：语法填空
阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。
Experiences are acquired through our journey in life; we choose and create our beliefs, fears and opinions based 1. all our experiences in life. Even though things and life are the way they are, mainly, we all have different opinions and 2. (believe) about everything and everybody. Other people have opinions about us all. But 3. really matters is the opinion we have about 4. (us). You either choose accept and follow what other people believe or decide 5. (become) yourself and live according to the reality of life.
By living life as it is and 6. (be) yourself, you create an image about yourself. It is7. (extreme) important to understand how this image, 8. (create) by your beliefs and imagination, directs and influences your growth. 9. image that you create about yourself 10. (determine) who you are and how you feel; it determines how successful you become in life. In short, you are as happy or sad as you see yourself.
查看答案和解析>>
科目：高中英语 来源：2016届海南海口湖南师大附中海口中学高三模拟一英语试卷（解析版） 题型：书面表达
作文
Bookcrossing. Com 是一个面向全球的图书分享网站。该网站组织的分享活动有两种参与方式：一是自由分享（wild release），即把书放在指定地点，由其他参与者自由获取；二是定向分享（controlled release），即直接传递给另一位参与者。假设你是李华，请用英文写信申请参加。内容应包括：
·表明写信目的
·选择一种分享方式
·简述作出该选择的理由
·希望了解更多信息
注意：（1）词数不少于80；
（2）书信格式及开头已给出（不计入总词数）
Dear sir/madam,
Learning that you are organizing this activity to share books worldwide, ________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
查看答案和解析>>
科目：高中英语 来源：2015-2016学年湖南衡阳八中高二下学期第一次月考英语卷（解析版） 题型：短文改错
短文改错
假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。
删除：把多余的词用斜线（﹨）划掉。
修改：在错的词下面划一横线，并在该词下面写出改正后的词。
注意：1．每处错误及其修改均仅限一词；2．只允许修改10处，多者（从第11处起）不计分。
I was playing at my cousin house. Since his family was rich than mine, he had more toys than I did. There was one on particular I’d always wanted. I put into my pocket when he wasn’t looking. I guessed, even at that age, I would never be able to enjoy to playing with the toy or faced my cousin again; I would always know I’d done something wrong. Late on, my aunt drove me home. When she dropped me off, I pulled out the toy slow and gave it back. She knows what had happened, but she thanked me and ever mentioned it again.
查看答案和解析>>
科目：高中英语 来源：2015-2016学年湖南衡阳八中高二下学期第一次月考英语卷（解析版） 题型：阅读理解
In an ideal world，people would not test medicines on animals. Such experiments are stressful and sometimes painful for animals，and expensive and time?consuming for people. Yet animal experimentation is still needed to help bridge vast gaps in medical knowledge. That is why there are some 50 to 100 million animals used in research around the world each year.
Europe，on the whole，has the world’s most restrictive(严格的) laws on animal experiments. Even so，its scientists use some 12 million animals a year，most of them mice and rats，for medical research. Official statistics show that just 1.1 million animals are used in research in America each year. But that is misleading. The American authorities do not think mice and rats are worth counting and，as these are the most common laboratory animals，the true figure is much higher. Japan and China have even less comprehensive（全面的） data than America.
Now Europe is reforming the rules governing animal experiments by restricting the number of animals used in labs. Alternatives to animal testing，such as using human tissue or computer models，are now strongly recommended. In addition，sharing all research results freely should help to reduce the number of animals for scientific use. At present，scientists often share only the results of successful experiments. If their findings do not fit the hypothesis（假设） being tested，the work never sees the light of day. This practice means wasting time，money，and animals’ lives in endlessly repeating the failed experiments.
Animal experimentation has taught humanity a great deal and saved countless lives. It needs to continue，even if that means animals sometimes suffer. Europe’s new measures should eventually both reduce the number of animals used in experiments and improve the way in which scientific research is conducted.
1.What is the main idea of this passage?
A. The success of animal experiments should be ensured.
B. A ban on the use of animals in the lab should be enforced.
C. Greater efforts need to be taken to reduce the number of lab animals.
D. Scientists should be required to share their research results with each other.
2.Which of the following statements is true about animals used in the lab?
A. America uses only about 1.1 million lab animals per year.
B. Europe does not use mice and rats as lab animals at all.
C. Britain does not use as many lab animals as China does.
D. Japan has limited data on the number of lab animals used each year.
3.Which of the following is mentioned as an alternative to replace animal experiments?
A. Statistical studies. B. Computer models.
C. DNA planted in animals. D. Tissue from dead animals.
4.What usually happens to unsuccessful animal experiments?
A. They are not made known to the public.
B. They are made into teaching materials.
C. They are collected for future publication.
D. They are not removed from the research topic list.
查看答案和解析>>
科目：高中英语 来源：2015-2016学年湖南衡阳八中高一下学期一次月考英语试卷（解析版） 题型：阅读理解
“My work is done.” Those words were some of the last penned by George Eastman. He included them in his suicide note. They mark an ignoble end to a noble life, the leave taking of a truly great man. The same words could now be said for the company he left behind. Actually, the Eastman Kodak Company is through. It has been mismanaged financially, technologically and competitively. For 20 years, its leaders have foolishly spent down the patrimony of a century’s prosperity. One of America’s bedrock brands is about to disappear, the Kodak moment has passed.
But George Eastman is not how he died, and the Eastman Kodak Company is not how it is being killed. Though the ends be needless and premature, they must not be allowed to overshadow the greatness that came before. Few companies have done so much good for so many people, or defined and lifted so profoundly the spirit of a nation and perhaps the world. It is impossible to understand the 20th Century without recognizing the role of the Eastman Kodak Company.
Kodak served mankind through entertainment, science, national defense and the stockpiling of family memories. Kodak took us to the top of Mount Suribachi and to the Sea of Tranquility. It introduced us to the merry old Land of Oz and to stars from Charlie Chaplin to John Wayne, and Elizabeth Taylor to Tom Hanks. It showed us the shot that killed President Kennedy, and his brother bleeding out on a kitchen floor, and a fallen Martin Luther King Jr. on the hard balcony of a Memphis motel. When that sailor kissed the nurse, and when the spy planes saw missiles in Cuba, Kodak was the eyes of a nation. From the deck of the Missouri to the grandeur of Monument Valley, Kodak took us there. Virtually every significant image of the 20th Century is a gift to posterity（繁荣） from the Eastman Kodak Company.
In an era of easy digital photography, when we can take a picture of anything at any time, we cannot imagine what life was like before George Eastman brought photography to people. Yes, there were photographers, and for ly large sums of money they would take stilted（不自然的） pictures in studios and formal settings. But most people couldn’t afford photographs, and so all they had to remember distant loved ones, or earlier times of their lives, was memory. Children could not know what their parents had looked like as young people, grandparents far away might never learn what their grandchildren looked like. Eastman Kodak allowed memory to move from the uncertainty of recollection, to the permanence of a photograph. But it wasn’t just people whose features were savable; it was events, the sacred and precious times that families cherish. The Kodak moment, was humanity’s moment.
And it wasn’t just people whose features were savable; it was events, the precious times that families cherish. Kodak let the fleeting moments of birthdays and weddings, picnics and parties, be preserved and saved. It allowed for the creation of the most egalitarian art form. Lovers could take one another’s pictures, children were photographed walking out the door on the first day of school, the person releasing the shutter decided what was worth recording, and hundreds of millions of such decisions were made. And for centuries to come, those long dead will smile and dance and communicate to their unborn progeny（子孙）. Family history will be not only names on paper, but smiles on faces.
The cash flow not just provided thousands of people with job, but also allowed the company’s founder to engage in some of the most generous charity in America’s history. Not just in Kodak’s home city of Rochester, New York, but in Tuskegee and London, and at the Massachusetts Institute of Technology. He bankrolled（资助） two historically black colleges, fixed the teeth of Europe’s poor, and quietly did good wherever he could. While doing good, Kodak did very well. Over all the years, all the Kodakers over all the years are essential parts of that monumental legacy. They prospered a great company, but they – with that company – blessed the world.That is what we should remember about the Eastman Kodak Company. Like its founder, we should remember how it lived, not how it died. History will forget the small men who have scuttled this company. But history will never forget Kodak.
1.According to the passage, which of the following is to blame for the fall of Kodak?
A. The invention of easy digital photography
B. The poor management of the company
C. The early death of George Eastman
D. The quick rise of its business competitors
2.It can be learnt from the passage that George Eastman .
A. died a natural death of old age.
B. happened to be on the spot when President Kennedy was shot dead.
C. set up his company in the capital of the US before setting up its branches all over the world.
D. was not only interested in commercial profits, but also in the improvement of other people’s lives.
3.Before George Eastman brought photography to people, .
A. no photos has ever been taken of people or events
B. photos were very expensive and mostly taken indoors
C. painting was the only way for people to keep a record of their ancestors.
D. grandparents never knew what their grandchildren looked like.
查看答案和解析>>
科目：高中英语 来源：2016届河北石家庄市高三复习教学质量检测（二）英语试卷（解析版） 题型：七选五
根据短文内容，从短文后的选项中选出能填人空白处的最佳选项，选项中有两项为多余选项。
Everyone can benefit from making an effort to practice gratitude（感激）every day. The following three steps can help you start feeling more grateful, and appreciative of the good things in your life:
Notice the Good Things in Your Life
1. Pay attention to the small everyday details of your life-nature, people, community, shelter, creature comforts like a warm bed or a good meal. And then start a gratitude journal. Making a commitment to writing down good things each day makes it more likely that we will notice good things as they happen.
Enjoy the Feeling of Gratitude
There are moments when you naturally, right then and there, feel filled with gratitude. These are moments when you say to yourself, "Oh, wow, this is amazing! "or "How great is this!"Pause. 2. Let it sink in . Enjoy your blessings in the moment they happen.
Express Gratitude
Expressing gratitude is more than being polite. 3. Show your appreciation to someone who really did something nice. Say: "It was really kind of you to…,” "You did me a big favor when...," or "Thank you for being there when...". 4. Hold the door open for the person behind you, even if it means waiting a little longer than you normally would.
True gratitude doesn't leave you feeling like you owe other people something-after all, if you've done someone a favor, you probably don't want the person to feel like you expect something back in return. 5.
A. It's about showing your heartfelt appreciation.
B. Notice and absorb that feeling of true gratitude.
C. You can also express gratitude by doing a kindness.
D. It's all about feeling good and creating a cycle of good.
E. Start to notice and identify the things you are grateful for.
F. Help someone without letting the person find out it was you.
G. It's amazing what you notice when you focus on feeling grateful.
查看答案和解析>>
湖北省互联网违法和不良信息举报平台 | 网上有害信息举报专区 | 电信诈骗举报专区 | 涉历史虚无主义有害信息举报专区 | 涉企侵权举报专区
违法和不良信息举报电话：027-86699610 举报邮箱：58377363@163.com
