Jack could have avoided that terrible car accident, but he ________ careful enough.
A. is not B. hasn’t been C. was not D. hadn’t been
The climate change conference has come to __________ end, but the developing countries are dissatisfied with __________ small step that the developed countries have taken to reduce the emission(排放) of water gases.
A. 不填， a B. 不填， the C. an , a D. an, the
目前，不少人在写作文或交流时喜欢使用网络语言。就此现象，你班最近举行了一场讨论。请根据下表的提示，客观地介绍讨论的情况及你的观点。
|
40%的同学认为 |
60%的同学认为 |
你的观点 |
|
1. 有点荒诞，有时让人无法理解 2. 违背了汉语的语法规则，对学习毫无帮助 |
1. 幽默，使语言更生动 2. 有助于表达思想 |
1… 2. … |
荒诞ridiculous
注意：
1. 对所给提示，不要简单翻译，可适当增加细节，使行文连贯。
2. 词数150左右。开头已给出，不计入总词数。
Nowadays, with the development of the Internet, there came a kind of language called Web Language.
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.
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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) ________ |
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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. |
“Luck is a matter of preparation meeting opportunity,” said the American talk show host Oprah Winfrey. I’ve never watched her show, but when a self-made billionaire gives life advice it’s probably worth listening to.
Her point is that blind luck is very rare. You may have to be lucky to find a good job these days but that does not mean you should sit at home waiting for the opportunity to come to you. If you’re a Chinese, you may already be familiar with the tale of a farmer waiting by a tree stump(树桩) for a rabbit to run out and break its neck.
A book by the UK psychologist Richard Wiseman, called The Luck Factor, argues we can all make ourselves luckier. It’s not about going to a temple to burn some incense(香) hopes that the gods will give you good fortune; it’s practical advice you can follow each day.
Wiseman conducted an experiment as part of his studies. First he divided volunteers into two groups; those who said they were lucky in life and those who said they were not. He gave everyone a newspaper and asked them to look through it to count how many photographs it had inside. On average, the unlucky people took about two minutes to count the photographs while the lucky people took just seconds. Why? On the second page of the newspaper, a command, “Stop counting. There are 43 photographs in this newspaper,” was written in big letters. The unlucky people mostly did not spot the message.
It’s easy to compare this situation to a young person looking for jobs in a local paper. They might search so hard for one type of position that they miss an even better opportunity. People who are “lucky”, in fact, keep an open mind and don’t go through the same routine every day.
I first came to China in 2002 when it was considered a rather strange thing to do. Like many foreigners, my plan was to teach English for one year. Seven years later, and still here, I’ve had many great opportunities such as writing for newspapers and magazines. I did not dream these would have been possible. I’ve also never been sick, had an accident, got into a fight or had problems with the police. Coincidence? After reading about Professor Wiseman’s studies I think not.
As Wiseman advises, I usually trust my own judgment. Your friends and parents may give you advice based on rational thinking, but it’s important to consider how you feel about each choice you make. Your feeling acts as a warning for a potential problem.
Finally, try to turn bad luck into good. Even if you do fall down and break a leg, the time spent at home can be used wisely to study English.
1.Which of the following proverbs most agrees with the writer’s point?
A. Make the best of a bad job.
B. Rome was not built in a day.
C. All is not gold that glitters.
D. A good heart conquers ill fortune.
2.What do you know about Oprah Winfrey?
A. She became famous through her family background.
B. She is a British talk show host.
C. She became successful by her own effort.
D. She was very lucky and seldom suffered setbacks in her life.
3.The writer quoted the Chinese tale of a farmer in order to show __________.
A. man can conquer nature
B. luck is in your own hand
C. bad luck can turn into good
D. you should not sit at home waiting for the opportunity to come to you
Recently there was a major discovery in the scientific research—the mapping of all DNA in a human gene（基因）is complete. Couple of years ago, this seems an impossible task for scientist to accomplish. All this progress in science leads us to believe that the day, when the human being will be cloned, is not far away. Human cloning has always been a topic of argument，in terms of morality or religion.
Taking a look at why cloning might be beneficial, among many cases, it is arguable that parents who are known to be at risk of passing a genetic limitation to a child could make use of cloning. If the clone was free of genetic limitations. Then the other clone would be as well. The latter could foe inserted in the woman and allowed to ripen to term. Moreover，cloning would enable women, who can’t get pregnant, to have children of their own.
Cloning humans would also mean that organs could be cloned, so it would be a source of perfect transfer organs. This, surely would be greatly beneficial to millions of unfortunate people around the world that are expected to lose their lives due to failure of single(or more) organ(s）.It is also arguable that a ban on cloning may be unlawful and would rob people of the right to reproduce and limit the freedom of scientists.
Arguments against cloning are also on a perfectly practical side. Primarily, I believe that cloning would step in the normal “cycle”of life. There would be a large number of same genes., which reduce the chances of improvement，and, in turn, development-the fundamental reason how living things naturally adapt to the ever-changing environment. Life processes failing to do so might result in untimely disappearance. Furthermore, cloning would make the uniqueness that each one of us possesses disappea. Thus, leading to creation of genetically engineered groups of people for specific purposes and, chances are, that those individuals would be regarded as “objects” rather than people in the society.Scientists haven’t 100 percent. guaranteed that the first cloned will be normal. Thus this could result in introduction of additional limitations in the human “gene-pool”.
Regarding such arguable topics in “black or white” approach seems very innocent to me personally. We should rather try to look at all “shades: of it. I believe that cloning is only legal if its purpose is for cloning organs, not humans. Then we could regard this as for “saving life” instead of “creating life”. I believe cloning humans is morally and socially unacceptable.
1.Which of the following is true according to the passage？
A. Genetic limitation will be beneficial for some women
B. A large number of genes will prevent us from developing
C. Prohibition of cloning might limit the freedom of scientists
D. First cloned humans might be normal according to scientists
2.What’s the author’s opinion on cloning?
A. Cloning should be entirely banned
B. Cloning should be used in creating life
C. Cloning will take away the right to reproduce
D. Cloning is acceptable if it is used for cloning organs
3.Where can you read this article?
A. In a story book. B. In a magazine. C. In a science fiction D. In a brochure
4.Which of the following shows the structure of the passage
