题目内容
In summer, millions of people will head for the beach．And while the ocean can be a great place to swim and play, it may also be useful in another way．Some scientists think that waves could help make electricity．
“Have you ever been on a surfboard or boat and felt yourself being lifted up by a wave? Or have you jumped in the water and felt the energy as waves crashed over you?” asked Jamie Taylor of the Wave Energy Group at the University of Edinburgh in Scotland．“There is certainly a lot of energy in waves．”
Scientists are working on using that energy to make electricity．
Most waves are created when winds blow across the ocean．“The winds start out by making little ripples （波纹） in the water, but if they keep on blowing , those ripples get bigger and bigger and turn into waves, ”Taylor said．“Waves are one of nature’s ways of picking up energy and then sending it off on a journey．”
When waves come towards the shore, people can set up dams or other barricades to block the water and send it through a large wheel called a turbine （涡轮） ．The turbine can then power an electrical generator （发电机） ．
The United States and a few other countries have started doing research on wave energy , and it is already being used in Scotland．
The resource is huge．We will never run out of wave power, besides, wave energy does not create the same pollution as other energy sources, such as oil and coal．
Oceans cover three quarters of the earth’s surface．That would make wave power seem perfect for creating energy around the world．There are some drawbacks, however．
Jamie Taylor said that wave power still cost too much money．He said that its effects on animals in the sea were still unknown．Plus, wave power would get in the way of fishing and boat traffic．
With more research, however, “many of these problems might be overcome,” Taylor said．“Demand for energy to power our TVs and computers, drive our cars, and heat and cool our homes is growing quickly throughout the world．Finding more energy sources is very important, for traditional sources of energy like oil and gas may run out some day．”
In the future, when you turn on a light switch, an ocean wave could be providing the electricity!
1.Which of the following is NOT true?
A．Wave power doesn’t cost too much money．
B．Wave energy is so clean that it doesn’t create the same amount of pollution as other energy sources．
C．Wave power affects fishing and boat traffic．
D．Wave power may affect marine animals．
2.We can infer from the passage that ______．
A．finding more new energy sources is not necessary because of wave energy
B．wave energy is a resource that will never run out and is used all over the world
C．wave power is not quite perfect for creating energy around the world
D．wave power doesn’t create any pollution
3.The underlined word “drawbacks” probably means ______．
A．regrets B．adventures C．disadvantages D．difficulties
4.What can be the best title for the passage?
A．How to Get Electricity by Waves B．The advantages of Wave Energy
C．Can Waves Make Electricity? D．The Disadvantages of Wave Energy
1.A
2.C
3.C
4.C
【解析】略
快乐5加2金卷系列答案Here in China, as the awareness of climate change improves, realizing a low-carbon way of life, also known as reducing your carbon footprint, is a growing trend among young Chinese.
Zheng Xiyu works at 1. office in Beijing’s Central Business District．Every day, 2. takes her roughly 40 minutes to go to work by bus．But she is thinking of 3. (switch) to a different way of transport--a bicycle．When buying clothes, she will choose those purely made of cotton, 4. it takes less carbon to produce cotton clothes．She’s also adapting to a vegetable diet as livestock(家畜) can make many contributions 5. today’s most serious environmental problems.
A recent survey shows 6. 78% of all the 17,000 people questioned have developed environmentally friendly habits in their daily lives．They are doing things, such as taking reusable shopping bags to the store and setting the air conditioner at a temperature above 26oC in summer.
On many popular 7. (society) networking websites, people are advocating a low-carbon lifestyle．Their tips include using the stairs and public transport more frequently 8. elevators and cars．They hope this lifestyle 9. (become) more than just a trend within certain groups.
As the most populous nation on the planet with the world’s fastest growing economy, China has become the second biggest emitter(排放者) of greenhouse gases．The recent extreme weather in the southern regions reflects a serious environmental challenge．Experts say there is no time 10. (delay) with the effort to reduce carbon emissions.
When did you last see a polar bear(北极熊)? On a trip to a zoo, perhaps? If you had attended a winter activity in New York a few years ago, you would have seen a whole polar bear club. These "Polar Bears" are people who meet frequently in the winter to swim in freezing cold water. That day, the air temperature was 3℃,and the water temperature was a little higher. The members of the Polar Bear Club at Coney Island, New York are usually about the age of 60. Members must satisfy two requirements. First, they must get along well with everyone else in the group; this is very important because there are so many different kinds of people in the club. Polar Bears must also agree to swim outdoors at least twice a month from November through February.
Doctors don't agree about the medical effects of cold-winter swimming. Some are worried about the dangers of a condition in which the body's temperature drops so low that finally the heart stops. Other doctors, however, point out that there is more danger of a heart attack during summer swimming because the difference between the air temperature and water temperature is much greater in summer than in winter.
The Polar Bears themselves are satisfied with the benefits of cold-water swimming. They say that their favorite form of exercise is very good for the circulatory system(循环系统) because it forces the blood to move fast to keep the body warm. Cold-water swimmers usually turn bright red after a few minutes in the water. A person who turns blue probably has a very poor circulatory system and should not try cold-water swimming.
The main benefits of cold-water swimming are probably mental. The Polar Bears love to swim all year round; they find it fun and relaxing. As one 70-year-old woman says, "When I go into water, I pour my troubles into the ocean and let them float away."
1.The members of the Polar Bear Club must meet the following requirements except that____.
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A．they must swim outdoors at least 8 times in the four cold months |
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B．they must reach the age of 60 |
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C．they should be easy to make friends with |
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D．they must agree to swim outdoors from November through February |
2.According to the passage, some doctors believe it is true that_____.
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A．polar Bears are bears swimming in freezing water |
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B．cold-water swimming can make the body temperature dangerously high |
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C．you are healthy if cold-water swimming turns your skin color blue |
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D．cold-water swimming causes more heart attacks in summer than in winter |
3.The Polar Bears like to swim year-round, for_____.
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A．it is an easy way to keep the body warm in winter |
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B．they can remain young |
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C．they find it enjoyable and interesting |
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D．they might meet fewer troubles in life |
4.The passage is mainly about_____.
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A．the requirements of the Polar Bear Club |
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B．a group of cold-water-swimming lovers |
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C．the Polar Bears' life in New York |
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D．doctors' ideas about cold-water swimming |