For years, the automobile industry has been testing vehicles that use hydrogen as fuel. Now, people across the United States have had a chance to see and even drive cars that get power from hydrogen fuel cells (燃料电池).
But the hydrogen fuel cell is not a new idea. The fuel cell was first invented by Sir William Grove of Britain in 1839. Since then, many different designs, have been invented. There is one place where fuel cells are a proven technology: in space. The American space agency used fuel cells in its Apollo spaceships in the twentieth century.
The most useful fuel cell for transportation purposes is the Polymer Electrolyte Membrane, or P.E.M. fuel cell. It is simple and can operate at temperatures of sixty to eighty degrees Celsius. That is much lower than other fuel cell designs. A P.E.M. fuel cell has two sides divided by a thin membrane (膜). Hydrogen gas is forced through one side where it comes in contact with a reactive material containing the metal platinum(铂). The membrane separates the electrons(电子) from the protons(质子) in the hydrogen atoms. The protons pass through it to the other side of the fuel cell. But the electrons are captured to do work; like powering a motor. Oxygen from the air is forced into the other side of the fuel cell. There, the gas meets the protons that have passed through the membrane. They combine to form water and heat. A single fuel cell does not produce a lot of electricity. But when many fuel cells are combined, they can produce enough electricity to power a vehicle. The product of the chemical reaction that powers fuel cells is water. This makes fuel cells a very clean technology.
Hydrogen fuel cell cars have been slow to develop because of many technical problems that have to be solved. For example, it is unclear how long the membranes in P.E.M. fuel cells will last. Also, fuel cells need water for their chemical reactions. They must be designed to start easily at low temperatures and in dry climates. And smaller, less costly fuel cells must be designed before they can truly take the place of gasoline engines. Now more models of fuel cell vehicles are being tested than ever before. The threat of climate change and the high cost of oil have increased interest in these vehicles that do not cause pollution.
| Title |
More Models of Hydrogen Cars Being Tested |
| The progress of hydrogen fuel cell |
·(1) ________ by Sir William Grove in 1839. ·Designed (2) ________ ever since. ·Used in Apollo spaceships in the twentieth century. |
| Operating principle of P.E.M. |
·It has two sides divided by a thin membrane. ·Hydrogen gas from one side (3) ________ the active metal platinum. ·The electrons are (4) ________ from the protons in the hydrogen atoms. ·The protons pass through the fuel cell to the other side. ·Oxygen from the air is (5) ________ into the other side of the fuel cell. ·The gas meets the protons，and then water and heat are(6) ________ |
| Reasons for slow (7) ________of hydrogen fuel cell cars |
·There are many technical problems (8) ________ ·The durability of the membranes in P.E.M. fuel cells is not clear. ·They have to start easily at (9)________ temperatures and in dry climates. ·They must be smaller and less costly before (10) ________ gasoline engines. |
Good study habits will contribute to a successful academic future. Good study habits lead to good grades, and good grades lead to applications for better colleges and universities. This in turn will lead to a great career.
To be successful, the first thing you need to do is to take responsibility for your actions. You are the only one who can decide your own important things and how to use your time. Your actions today will decide what will happen tomorrow and even in the near future.
Your success rests in your own hands. Do not be influenced by others. Be a leader, not a follower. Do not allow your friends to tell you what is important. Keep friends who lead you towards your goals, not away from them.
The most important thing to learn to succeed in the classroom is to make full use of your time outside the classroom. Review your class notes and the proper chapters (章节) in your textbooks. Different people work better at different times. Some students work better in the morning, while some can study better in the afternoon, or at night. Nightly review of your notes is a great idea and will help you understand your lessons to a much greater degree. This review will save time in the long run. If you study in the morning, plan to study your hardest subjects first. If you prepare for your lessons in advance, you will be more relaxed in classes.
Set the more important things into your plan, have a to-do list and put the most important project first. Once this is done, move to the second most important project. Crossing off each project as you finish will give you a sense of achievement.
Choose a study place where you can be comfortable and pay attention to other things that help to improve your productivity (效率). For example, can you study well with soft music in the background?
Always challenge yourself. Do not be satisfied with your own school textbooks. Ask questions and do your own research. Share your knowledge and listen to others. When you share your knowledge, you help others increase their knowledge. As an unexpected result, when you help others, you learn more.
Always seek solutions to problems. If you have difficulty understanding something in the book, read it again. If you still cannot understand it, ask the teacher for help. Make sure to look for help immediately or you may fall behind.
When you put your best effort into you work, you are already a success! When you follow these study habits successfully, you will develop a sense of satisfaction. This will provide you with a strong feeling of pride because of your achievement. Your good grades will give you confidence for the future. These habits will contribute to a successful and happy future!
| Title |
The |
| Reason |
In order to have a great career in the future, we need to form good study habits, which |
| ·Be responsible for yourself and don’t be influenced by others. · ·Make ·Put the most important projects into your ·Choose to study in a ·Learn to ·Learn to turn to others for help and try to |
|
| Conclusion |
·With these good study habits, you will develop a sense of satisfaction. ·With these habits, your good grades will make you feel ·With these habits, You will have a successful and happy future. |
阅读下面短文，根据所读内容在表格中的空白处填入恰当的单词。
注意：每个空格只填一个单词。
It’s necessary to use different ways to communicate for different purposes. Study, made by Jeff Hancock of Cornell University in New York, has found that people are twice as likely to tell lies in phone conversations as they are in e-mails.
Hancock made an investigation by asking 30 students to keep a communication diary for a week. In it they noted the number of conversations or e-mail exchanges they had lasting more than 10 minutes, and how many lies they told. Hancock then worked out the number of lies per conversation for each medium. He found that lies made up 14% of e-mails, 21% of instant messages, 27% of face-to-face interactions and an astonishing 37% of phone calls.
His results, to be presented at the conferences on human computer interaction in Vienna, Austria, in April, have surprised psychologists.
Hancock says it is very important and effective whether a conversation is being recorded and could be reread, and whether it occurs in real time. People appear to be afraid to lie when they know that they will be responsible for what they have said in the conversation. This is why fewer lies appear in e-mail than on the phone.
People are even more likely to lie in real time—in an instant message or phone call. Many lies are sudden or immediate responses to demands that they don’t expect.”
Hancock hopes his research will help many a company work out the best ways for their employees to communicate. For instance, the phone might be the best medium for selling their products where employees are encouraged to stretch the truth. But given his results, work assessment, where honesty is regarded as more important than others, might be best done using e-mail.
| Hancock’s study on people |
|
| Lies |
|
| Reasons why people lie or don’t |
●People won’t lie when their ●People lie in real time mostly because they have to answer |
Benefits that |
●Using telephones for ●Using e-mails for work assessment because their employees must say what they have done |
| Inference from the study |
Suitable media should be chosen for different |
(共10小题；每小题1.5分，满分15分)
阅读下面材料，在空白处填入适当的内容（不多于3个单词）或括号内单词的正确形式。
Smith: Mary, have you got the result of the exam?
Mary: No. How is it?
Smith: Terrible. It seems that only half of the students passed the final exam.
Mary: Really? The exam_ been very difficultthis time.
Smith: Well, I’m really(surprise) too. There are many students who definitely didn’t fail. According to Carl, there are eight boys in his class who failed,
(include) himself and Gorge.
Mary: Oh! Gorge is of the top students in the college. What about his sister, Catherine? Did she pass?
Smith: Oh, yes. It seems that she (get) good marks.
Mary: That’s (absolute) unbelievable! Gorge was
much better student than his sister, and has been working so hard for the last few months.
Smith: It seems (fair), doesn’t it? But, from
I’ve heard, perhaps he worked too hard. He was ill during the week of the exam.
Mary: Oh, I see. These things happen, sometimes. I suppose the teacher will take his illness into account and give him a pass.
Smith: Well, there is a rumor going around the head of the Department is leaving.
Mary: Because of the bad result, you mean?
Smith: Well, I suppose so. I’m not sure. Maybe Mr. Dustin is going to be the new Department Head.
任务型阅读（每空一词）(共10小题；每小题1分，满分10分)
Educating girls quite possibly harvests a higher rate of return than any other investment available in the developing world. Women’s education may be an unusual economical field, but increasing women’s contribution to development is actually as much an economic as a social issue. And economics, with its focus on encouragement, provides an explanation for why so many girls are rid of an education.
Parents in low-income countries fail to invest in their daughters because they do not expect them to make an economic contribution to the family: girls grow up only to marry into somebody else’s family and bear children. Girls are thus seen as less valuable than boys and are kept at home to do housework while their brothers are sent to school-the prophecy becomes self-fulfilling, trapping women in a vicious(恶性的) circle of neglect.
An educated mother, on the other hand, has greater earning abilities outside the home and faces an entirely different set of choices. She is likely to have fewer but healthier children and can insist on the development of all her children, ensuring that her daughters are given a fair chance. The education of her daughters then makes it much more likely that the next generation of girls, as well as of boys, will be educated and healthy. The vicious circle is thus transformed into a virtuous circle.
Few will argue that educating women has great social benefits. But it has enormous economic advantages as well. Most obviously, there is the direct effect of education on the wages of female workers. Wages rise by 10 to 20 per cent for each additional year of schooling. Such big returns are impressive by the standard of other available investments, but they are just the beginning. Educating women also has a significant effect on health practices, including family planning.
Topic: The significance of female in developing countries
| Viewpoint |
Educating girls is more |
|
| Families |
From low-income families |
From educated mothers’ families |
| Attitudes |
Girls are of |
Development should be for all the |
| Practices |
There is little Girls are made to stay at home, |
It is insisted that girls and boys be offered chances to be |
| Consequences |
A vicious circle |
A virtuous circle |
| Significance |
Educating women contributes to social |
|
| Educating girls in developing countries is important and rewarding. |
阅读下面短文，根据以下要求：1）汉语提示；2）首字母提示；3）语境提示, 在每个空格内填入一个适当的英语单词，所填单词要求意义准确、拼写正确。（每题1分；共10分）
All the students present, may I have your attention, please? I'm Elizabeth Taylor. As editor of the Voice, I'd like to iyou to our school newspaper. We need new hands to help us
can tell the students what's new every day through our newspaper. Experience isn’t quite necessary, but writing and typing skills are in great
. We need people to read our
（文章）to type and check them. We could also use a good photographer and several engineers. Since the Voice comes
five days a week. We need good students who know how to make the
of their time. There’s some money for salaries
on how much work to do, but don't expect to get rich. This isn’t something you do for money. Mostly it's just for fun. Anyone who’s w
to joining us should speak to me
（立刻）after this meeting. Be p
to start right away. Our first paper appears tomorrow.