Wind is the movement of air from an area of high pressure to an area of low pressure. In fact, wind exists because the sun unequally heats the surface of the Earth. As hot air rises, cooler air moves in to fill the gap. As long as the sun shines, the wind will blow. And as long as the wind blows, people will manage it to power their lives.
Ancient sailors used sails to capture the wind and explore the world. Farmers once used windmills to grind their grains and pump water. Today, more and more people are using wind turbines to make electricity from the breeze. Over the past decade, wind turbine use has increased at more than 25 percent a year. Still, it only provides a small part of the world's energy.
Most wind energy comes from turbines that can be as tall as a 20-story building and have three 200-foot-long (60-meter-long) blades. These devices look like giant airplane propellers(螺桨)on a stick. The wind spins the blades, which turn a shaft connected to a generator.
The biggest wind turbines generate enough electricity to supply about 600 U.S. homes. Wind farms have tens and sometimes hundreds of these turbines lined up together in particularly windy spots, like along a ridge. Smaller turbines set up in a backyard can produce enough electricity for a single home or small business.
Wind is a clean source of renewable energy that produces no air or water pollution. And since the wind is free, operational costs are nearly zero once a turbine is erected. Mass production and technology advances are making turbines cheaper, and many governments decrease tax to encourage wind-energy development.
Some people think wind turbines are ugly and complain about the noise the machines make. The slowly rotating blades(螺旋风片) can also kill birds and bats, but not nearly as many as cars, power lines, and high-rise buildings do. The wind is also changeable: If it's not blowing, there's no electricity generated.
Nevertheless, the wind energy industry is increasing sharply. Globally, generation more than quadrupled(四倍) between 2000 and 2006. At the end of last year, global capacity was more than 70,000 megawatts. In the energy-hungry United States, a single megawatt is enough electricity to power about 250 homes. Germany has the most installed wind energy capacity, followed by Spain, the United States, India, and Denmark. Development is also fast growing in France and China.
Industry experts predict that if this pace of growth continues, by 2050 the answer to one third of the world's electricity needs will be found blowing in the wind
63. According to the passage, which of the following statements is true?
A. The rotating blades can kill as many birds as high-rise buildings do
B. Single families are not encouraged to build turbines.
C. The USA produces more wind power than any other country in the world.
D. The noise the turbines make may discourage people from building them.
64. The underlined word “generator” in the third paragraph probably means_______.
A. 电动机 B. 发电机 C. 机翼 D. 飞机引擎
65. If the USA wants to build wind turbines in an area with 30,000 homes, how many
should they build at least?
A. 50. B. 150. C. 250. D. 200.
66. All the following are the advantages of wind energy EXCEPT that_________.
A. it is environmentally friendly B. it is free to build and operate
C. the government supports it D. the energy is clean and renewable
What should you think about in trying to find your career? You are probably better at some school subjects than others. These may show strengths that you can use in your work. A boy who is good at mathematics can use that in an engineering career. A girl who spells well and likes English may be good at office work. So it is important to do well at school. On the other hand, you may not have any specially strong or weak subjects but your records show a general satisfactory standard. Although not all subjects can be used directly in a job, they may have indirect value. Knowledge of history is not required for most jobs but if history is one of your good subjects you will have learned to remember facts and details. This is an ability that can be useful in many jobs.
Your school may have taught you skills, such as typing or technical drawing, which you can use in your work. You may be good at metal work or cookery and look for a job where you can improve these skills.
If you have had a part-time job on Saturdays or in the summer, think what you gained from it. If nothing else, you may have learned how to get to work on time, to follow instructions and to get on with older workers. You may have learned to give correct change in a shop, for example. Just as important, you may become interested in a particular industry or career you see from the inside in a part-time job.
Facing your weak points is also part of knowing yourself. You may be all thumbs when you handle tools. Perhaps you are a poor speller or cannot add up a column of figures. It is bitter to face any weaknesses than to pretend they do not exist. Your school record, for instance, may not be too good, yet it is an important part of your background. You should not be apologetic about it but instead recognize that you will have a chance of a fresh start at work.
51. We can infer from the first paragraph that_______.
A. learning better at school shows power in your job
B. the better you are at school subjects, the more helpful they are in your career
C. learning each subject well is an ability in many jobs
D. we should think about how to find our career
52. According to the passage, if a student’s school record is not good, he will _________.
A. have no hope in his future work
B. be hopeful to find a suitable job
C. regret not having worked harder at school
D. have an opportunity of a new beginning in his future work
53. All the subjects may have direct value for job hunting except___________.
A. mathematics B. English C. history D. technical drawing
54. The underlined words "all thumbs" in Paragraph 4 most probably mean_________.
A. heavy-handed B. the best C. important D. skilled
55. The passage mainly discusses ___________.
A. the relationship between school performance and career
B. how to get a job
C. how to show strengths in your work
D. working experience and knowledge at school
Whether you're heading into the wild or down the road, it's hard to find a better electronic sidekick than a GPS. (Well, you know, other than a cell phone.)
Because a GPS has to receive a signal from space, physical impediments(遮挡) like skyscrapers, cliff faces, and even trees can stump(阻断) it. Reception is less of an issue with the ultrasensitive(超灵敏) chipsets in newer models, but if the walls are closing in on you, take a tip from a time when navigation systems weren't the streamlined panels they are today: Hooking up an antenna(天线) will make use of even the most tenuous celestial connection. There's a port on the back of most GPS devices for jacking in.
You'll also want to remember that a GPS is not a compass: It runs on software. Like your PC, it needs to communicate with the mother ship periodically. Vendors(供应商) refresh firmware and maps on a regular basis, sometimes even daily. These updates deliver new bits of data that significantly affect your gadget's accuracy. But if you live in the boonies(郊区) on a road named after your sister-wife, don't expect NavTeq to come a-knocking with its survey equipment. Fortunately, most companies make it easy to update your own maps. Usually it's as simple as plugging into your home computer, dropping a couple of pins in Google Maps, and clicking Save.
If you own a new Tom Tom, it's even easier. You can edit maps on the unit itself, though you might not have to: Some of the company's navigation updates themselves. Tom Tom's IQ Routes software takes data from every person who uses the company' gadgets and readjusts its assumptions about which roads you should use and how long a given route will take. It will even change its own maps.
See, it's not that hard: Your GPS may use NASA technology, but getting the most out of it isn't rocket science.
46. The writer thinks the useful electronic partner is __
____besides a cell phone when driving outdoors.
A. a GPS B. Tom Tom's IQ Routes C. a PC D. NASA
47. Which statement is NOT true about a GPS according to the passage?
A. It receives a signal from space.
B. It is not a compass.
C. It needs to refresh its information.
D. It has no port to connect other equipment.
48. You may learn from the passage that Tom Tom (Para 4) is _______.
A. a GPS receiver
B. a device that can be used to edit maps
C. a device that can be used to update software
D. a person who readjusts GPS assumptions
49. The main idea of the last paragraph is _______.
A. that we should make the most of GPS in rocket science
B. that getting the most out of GPS is too difficult
C. getting the most out of GPS is very easy
D. GPS owns NASA technology
50. Which is not mentioned about a GPS according to the passage?
A. Its usage. B. Its price and shape. C. Its technology. D. Its benefit.
File-sharing occurs whenever one individual sends a file to another. The only way to even try to limit this process is to monitor all communication between ordinary people. Despite the crackdown on Napster, Kazaa and other peer-to-peer(对等网络) services over the past decade, the volume of file-sharing has grown exponentially. Even if the authorities closed down all other possibilities, people could still send copyrighted files as attachments to e-mails or through private networks. If people start doing that, should we give the government the right to monitor all mail and all encrypted(加密) networks? Whenever there are ways of communicating in private, they will be used to share copyrighted material. If you want to stop people doing this, you must remove the right to communicate in private. There is no other option. Society has to make a choice.
The world is at a crossroads. The internet and new information technologies are so powerful that no matter what we do, society will change. But the direction has not been decided.
The internet it still in its infancy, but already we see fantastic things appearing as if by magic. Take Linux, the free computer operating system, or Wikipedia, the free encyclopedia. But where technology opens up new possibilities, our intellectual property laws do their best to restrict them. Linux is held back by patents, the rest of the examples by copyright. The public increasingly recognizes the need for reform.
Our manifesto(声明) is to reform copyright laws and gradually abolish(废除) the patent system. We oppose mass surveillance (监视)and censorship(审查制度) on the net, as in the rest of society. We intend to devote all our time and energy to protecting the basal civil liberties on the net and elsewhere.
Political decisions taken over the next five years are likely to set the course we take into the information society, and will affect the lives of millions for many years into the future. The information revolution is happening here and now. It is up to us to decide what future we want.
41. Which of the following statements is NOT true according to the passage?
A. Over the past decade, the volume of file-sharing has increased doubly.
B. Over the past decade, other peer-to-peer(对等网络) services have been beaten down.
C. Copyright laws should be reformed.
D. File-sharing occurs unless a file is sent on the Internet.
42. In the opinion of the writer, the government ________.
A. has to make a choice
B. should stop people sharing the copyrighted files
C. shouldn't stop people sharing the copyrighted files
D. should monitor all the mail and all encrypted (加密) networks
43. The author's main purpose in writing the passage is____________.
A. to have the basal citizen's freedom on the net and elsewhere
B. to establish the patent system
C. to abolish copyright laws
D. to reform computer operating system
44. The underlined word “restrict” in Paragraph 3 most probably means__________.
A. remove B. limit C. close D. reform
45. We can infer from the passage_______________.
A. A new information revolution will be coming.
B. People won't share copyrighted material on the net
C. People can share the free encyclopedia
D. The future of the Internet will rely on the government
Children who speak English as their first language are now a minority in inner-city London primary schools，official figures show.
Youngsters with foreign mother tongues form a majority at primary schools in 13 out of33 London cities. Across the country，English is a foreign language to more than one in seven primary school youngsters.
The figures from the Department for Children，Schools and Families (DCSF) point to major demographic (人口的) changes over the past few decades，with around a fifth of pupils now coming from ethnic minorities.
There are concerns that school finances are coming under stress from the growing numbers of youngsters requiring help with English. The government has been urged to provide more funding，and give fair treatment to schools with large concentrations of non-English speakers.
In Tower Hamlets almost four out of five youngsters do not have English as their mother tongue. In other areas，including Leicester，Luton and Bradford the proportion approaches 50 percent.
The figures indicate that many recent migrants have settled in London. Sir Andrew Green，Founder and Chairman of Migration Watch UK，says，“These figures confirm the huge impact immigration is having on our society. When government funds are as tight as they are，this is bound to have a negative impact，since children for whom English is a second language need extra tuition (学费).”He adds，“In inner London it's hard to know with whom immigrant children are supposed to practice English，since the number of immigrant children is much larger than that of local. ”
A spokesman for DCSF stresses that the figures “only indicate the language to which a child was initially exposed at home，regardless of whether he or she comes to speak English fluently later on. It is only a relatively few recent arrivals for whom communication problems are serious”.“We are increasing funding to the Ethnic Minority Achievement Grant (助学金)to £206 million by 2010，to help bring students weak in English up to speed. We’re also equipping schools to offer effective English as an Additional Language teaching to new arrivals，”he adds
72.A minority of London primary school students speak English as their first language because
.
A. local children prefer to speak other languages
B. more and more immigrant children are attending school in London
C. children learning English as an additional language need extra tuition
D. English is too difficult a language for primary school children to learn
73.Some people worry about .
A. the increasing number of adults needing help with English
B. the government taking no measures to help the schools
C. non-English speakers putting school finances under stress
D. London schools not providing adequate service for children in need
74.It can be inferred from the passage that .
A. most immigrant children make a great effort to learn English
B. the government used to treat non-English speakers unfairly
C. it's not easy to find English speakers for immigrant children in some parts of London to communicate with
D. local children are influenced by immigrant children
75.According to the spokesman for DCSF，the figures indicate .
A. that children will speak English fluently later on
B. that immigration is having a huge impact on English society
C. what the language the children were exposed to first was
D. that funding is increasing to help students weak in English
Peanut allergies (过敏) are among the most common and most dangerous of food allergies. A tiny exposure to peanuts can mean big trouble for a person with a peanut allergy—not just sneezing or coughing，but something as potentially deadly as narrowing of the airways.
But a recent study suggests that some children may be able to beat back their allergic reactions to peanuts by gradually introducing trace amounts of the nut into their diets. It's too early to say for certain，so if you have a peanut allergy，do not try this at home. But the first results look promising.
Two teams of scientists have been experimenting on a group“of 29 children who are allergic to peanuts”At the beginning of the study，each kid received less than 1/1，000 of a peanut per day. (Imagine splitting a peanut into 1，000 parts!) Over the course of the study， the children gradually increased the amount of the peanut in their diets
Nine of the children have been receiving the treatment for two years，and five of those nine now appear to be free of their peanut allergies，and can eat peanuts with no problem. But the other four have not benefited so much from the therapy（治疗）.
The two teams of scientists are now doing a follow-up study on two groups of children with the allergy. Children in one group will receive the new therapy，while the others will not. Researchers hope this study will help them learn if the therapy truly does work.
Scientists don't understand why some people get peanut allergies and others don't，but are trying to find a way to help people with the allergy. Because of the severity of some peanut allergies，scientists want to know the answer as soon as possible. “This is very encouraging， but remember，it's not something you try at home，”says one of the researchers.
68.According to the passage，the peanut allergy.
A. can be deadly if only a small amount is used
B. causes a lot of trouble for many parents
C. allows people to eat only small amounts of peanuts
D. is considered the least common and dangerous food allergy
69.Scientists are trying to treat peanut allergies by.
A. exposing children with the allergy to as many peanuts as possible
B. changing the eating habits of children with peanut allergies gradually
C. giving children Peanuts in slowly increasing amounts
D. exploring ways to resist the feelings caused by peanut allergies
70.The experiment shows that.
A. people with peanut allergies can't use small amounts of peanuts in their diets.
B. children are more easily cured than adults
C. all children can be cured of their peanut allergies if given more time of treatment
D. about 55-percent children with peanut allergies have been cured
71. Scientists are now doing a follow-up study in order to.
A. explore why some people get the illness while others don’t
B. show whether peanut allergies can really be dangerous
C. check whether the therapy really works or not
D. explore whether the allergy can be cured without treatment