"Have you ever been out on a boat and felt it lifted up by a wave? Or have you jumped in the water and felt the rush of energy as waves came over you.?" asked Jamie Taylor of the Wave Energy Group at the University of Edinburgh. "There is certainly a lot of energy in waves," he said. Scientists are working to use that energy to make electricity. Most waves are created when winds blow across the ocean. "The wind starts out by making little ripples (漣漪), 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 toward the shore, people can set up dams to block the water and send it through a large wheel called a turbine (渦輪機(jī)). The turbine can then power an electrical generator to produce electricity.

"The resource is huge," said Janet Swain of the World Watch Institute. "We will never run out of wave power." Besides, wave energy does not create the same pollution as other energy sources, such as oil or coal. Oceans cover three-quarters of the Earth's surface---that would make wave power seem ideal for creating energy throughout the world, though there are some weak points yet to overcome.

Swain said that wave power still costs too much money. She also said that its effects on sea animals are still unknown. What is more, wave power could affect fishing and boat traffic. Traditional sources of energy like oil and gas may someday run out. "Demand for energy to power our TVs and computers, drive our cars, and heat and cool our homes is rising rapidly throughout the world," Swain said. In the future when you turn on a light, an ocean wave could be providing the electricity!

1.The underlined phrase "picking up" is closest in meaning to ______.

A. starting again B. speeding up

C. improving D. gathering

2.We can make better use of wave energy if we ______.

A. shorten its journey to thousands of homes

B. build more small power stations on the oceans

C. reduce the cost of turning it into electric power

D. quicken the steps of producing electricity

3.It can be inferred that some day we might not worry about ______.

A. our power supply B. our boat traffic

C. air pollution D. our supply of sea fish

練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：高中英語(yǔ) 來(lái)源：2015-2016學(xué)年四川眉山中學(xué)高一上學(xué)期半期英語(yǔ)試卷（解析版） 題型：閱讀理解

Johnny Smith was a good math student at a high school. He loved his computer. He came home early every day, and then he worked with it till midnight. But Johnny was not a good English student, not good at all. He got an F in his English class. One day after school Johnny joined his computer to the computer in his high school office. The school office computer had the grades of all the students: the math grades, the science grades, the grades in arts and music, and the grades in English. He found his English grade. An F! Johnny changed his English grade from an F to A. Johnny' parents looked at his report card. They were very happy.

"An A in English!" said Johnny's Dad. "You're a very clever boy, Johnny."

Johnny is a hacker(黑客). Hackers know how to take information from other computers and put new information in. Using a modem（調(diào)制調(diào)解器）, they join their computers to other computers secretly. School headmasters and teachers are worried about hackers. So are the police, for some people even take money from bank computer account and put it into their own ones. And they never have to leave home to do it! They are called hackers.

1.Johnny changed his English grade with the computer in _______.

A. the classroom B. the school office

C. a bank near his house D. his own house

2.When Johnny's parents saw the report, they were happy because _______.

A. Johnny was good at math

B. Johnny loved computers

C. Johnny could join one computer to another

D. they thought Johnny was not poor in English any longer

3.Who are worried about hackers in the story?

A. Johnny's parents

B. School headmasters, teachers and the police

C. Only the police

D. Many school headmasters and teachers

4.What should the hackers know well, do you think, after you read this story?

A. Information B. Bank computer accounts

C. Computers D. Grades

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：2016屆寧夏銀川九中高三第三次月考英語(yǔ)試卷（解析版） 題型：閱讀理解

You may have never heard of Lanthanum, Cerium or Neodymium, but these elements (元素) and others known as “rare earth” play a major role in modern technology. They can actually be found in many places on the earth, but not in quantities that can be mined. Only a few countries — China, America, India, Australia, Brazil and Malaysia have any that can be mined enough to be traded.

Even though some of these elements such as Cerium are as abundant as Copper, they are not found in concentrated amounts on the earth’s surface. They are often mixed together with other metals, which makes extraction (提取) of these elements an expensive and an environmentally messy process. It was due to this reason that the term “rare earth” was invented.

Rare earth metals are used widely in our life. Rechargeable car batteries, computers, iPhones, DVD players, computer monitors, televisions, lighting, lasers, glass polishing, and superconductors all use quantities of rare earth metals. Also, with the advancement in “green” technology like solar panels, these shiny materials are becoming more important than ever. An average electric car uses 10 pounds of Lanthanum for its rechargeable battery!

America has large deposits (存儲(chǔ)量) of rare earths and has one of the first mines. It was opened in Southern California in 1940. The element “Europium” was the first metal to be separated in quantity for use in color televisions. However, in the 1980’s and 1990’s, as China started producing these elements in Inner Mongolia, the mines in America and elsewhere could not keep pace. The mine in Mountain Pass, California also failed environmental regulations and shut down in 2002.

Now, recognizing the importance of having more than one supplier of this important resource, other rare earth owning countries like India and Australia are either dusting off their rare earth mines or speeding up their production. It is believed that the debate over rare earths will become louder in the coming months and years.

1.What can we learn about rare earths?

A. They are actually as abundant as Copper.

B. They can be mined easily as other metals.

C. They can only be found in a few countries.

D. They are not really as rare as they are named.

2.Compared with China, America _____.

A. paid more attention to Europium

B. has larger deposits of rare earths

C. started producing rare earths earlier

D. has more rare earth mines

3.It can be inferred from the text that rare earths _____.

A. are now in great demand

B. can now be used in few fields

C. are harmful to the environment

D. will soon be replaced by other metals

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：2016屆北京通州區(qū)潞河中學(xué)高三上學(xué)期期中英語(yǔ)試卷（解析版） 題型：單項(xiàng)填空

_______ your work on time, otherwise you will be in trouble.

A. To finish B. Finishing

C. Finish D. Finished

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：2016屆四川雅安市高三11月月考英語(yǔ)試卷（解析版） 題型：閱讀理解

Failing in something isn’t a really nice feeling, but Scotland’s Fettes College in Edinburgh wants to show its students that failure isn’t something to fear and is actually something to accept willingly!

The boarding school held “failure week” to celebrate taking risks and learning from them. Whether in sports or school, children often face lots of pressure to succeed and do well, and the school was becoming concerned.

“Young people from all walks of life live in a high-pressure environment where they are trying very hard to achieve a level of perfection,” said Sue Bruce, head of personal and social education in the school.

“This week at Fettes we have been focusing on one of the most misunderstood parts of success: failure. While we are often scared of failure, it is important to learn that it is only through failing, often many times, that we learn how to succeed. All through the week, we have looked at the experiences of some of the most successful inventors, artists and businessmen, who failed hundreds, if not thousands of times on their journey to success,” read a letter on Fettes College’s website.

To celebrate failure, students were encouraged to try something they’ve never done before, like playing an instrument or dancing in front of audiences. A number of students stepped up and tried things that they finally failed in, but they had fun and enjoyed the experience. “The concert was extremely enjoyable, proving that we should always try not to worry about failure and have a go!” read another note on the website. Students were also taught about famous people like J.K. Rowling and Richard Branson who failed many times before they finished what they set out to do.

“If they let the fear of failure stop them from doing something, they are actually stopping themselves from learning, developing, and potentially succeeding,” said Bruce.

1.What is the purpose of the boarding school to hold “failure week”?

A. To get the students involved in social activities.

B. To help the students accept and learn from failure.

C. To make the students study even harder.

D. To teach the students how to get relaxed.

2.During the “failure week” the students could do the following things EXCEPT ___________.

A. taking risks

B. learning from others’experiences

C. trying something new

D. trying to entertain themselves

3.What can we learn from the passage?

A. Many successful people are lucky and achieve success easily.

B. Because we are often scared of failure ,we never succeed.

C. The fear of failure can stop the students from learning and succeeding.

D. The students who failed in trying new things felt depressed.

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：2016屆湖北襄陽(yáng)棗陽(yáng)市高三上學(xué)期期中英語(yǔ)試卷（解析版） 題型：閱讀理解

The extraordinary Eastgate Building in Harare, Zimbabwe’s capital city, is said to be the only one in the world to use the same cooling and heating principles as the termite mound(白蟻堆).

Architect Mick Pearce used precisely the same strategy when designing the Eastgate Building, which has no air-conditioning and almost no heating. The building—the country’s largest commercial and shopping complex—uses less than 10% of the energy of a conventional building of its size. The Eastgate’s owners saved $3.5 million on a $36 million building because an air-conditioning equipment didn’t have to be imported.

The complex is actually two buildings linked by bridges across a shady, glass-roofed atrium(天井) open to the air. Fans suck fresh air in from the atrium, blow it upstairs through hollow spaces under the floors and from there into each office through baseboard vents(通風(fēng)口). As it rises and warms, it is drawn out via ceiling vents and finally exists through forty-eight brick chimneys.

During summer’s cool nights, big fans blow air through the building seven times an hour to cool the empty floors. By day, smaller fans blow two changes of air an hour through the building, to circulate the air which has been in contact with the cool floors. For winter days, there are small heaters in the vents.

This is all possible only because Harare is 1600 feet above sea level, has cloudless skies, little dampness and rapid temperature changes—days as warm as 31℃ commonly drop to 14℃ at night. “You couldn’t do this in New York, with its hot summers and cold winters,” Pearce said.

The engineering firm of Ove Arup & Partners monitors daily temperatures. It is found that the temperature of the building has generally stayed between 23℃ and 25℃, with the exception of the annual hot period just before the summer rains in October and three days in November, when a doorkeeper accidentally switched off the fans at night. And the air is fresh—far more so than in air-conditioned buildings, where up to 30% of the air is recycled.

1.Why was Eastgate cheaper to be built than a conventional building?

A. It was designed in a smaller size.

B. No air conditioners were fixed in.

C. Its heating system was less advanced.

D. It used rather different building materials.

2.What does “it” refer to in Paragraph 3?

A. Hollow space.

B. Baseboard vent.

C. Fresh air from outside.

D. Heat in the building.

3.Why would a building like Eastgate Not work efficiently in New York?

A. New York has less clear skies as Harare.

B. Its dampness affects the circulation of air.

C. New York covers a larger area than Harare.

D. Its temperature changes seasonally rather than daily.

4.The data in the last paragraph suggests Eastgate’s temperature control system_____.

A. works better in hot seasons

B. can recycle up to 30% of the air

C. functions well for most of the year

D. allows a wide range of temperatures

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：2015-2016學(xué)年河南許昌三校高一上學(xué)期期中考試英語(yǔ)試卷（解析版） 題型：完形填空

A strange thing happened to me last Sunday. It was such a beautiful day ________ I drove to go for a look in the country.

On the way back home, my stopped. It was out of gas on a ________ road far from a town! I decided to walk until I found someone ________ could sell some gas. I had walked almost a mile ________ I finally found a house near the ________ . I was glad to see it because it was getting dark.

I knocked at the door and a little old lady with long white hair ________ . She said, “I’ve been ________ for you here for a long time. Come in. ________ is almost ready.”

“But I only came for some gas,” I answered. I couldn’t ________ what she was talking about.

“Oh, Alfred! Gas? You ________ tea,” said she.

I quickly ________ that my car was out of ________ , but she didn’t seem to listen to me. She just kept ________ me Alfred and talking about how long it had been ________she had seen me. She was acting very strangely and I was anxious to leave. As soon as she went to get tea, I went out of the house as fast as I ________ .

_________, there was another house down the road and I was able to buy the gas I needed. When I told the man about my ________ , he said, “Oh, that’s Miss Emily. She lives by herself in that big house. She’s strange, but she wouldn’t ________ anybody. She is still waiting for the man she was going to marry thirty years ago. The day before their wedding he left home and ________ came back because of the war.”

1.A. and B. so C. but D. that

2.A. car B. bus C. bike D. truck

3.A. narrow B. lonely C. crowded D. busy

4.A. what B. whom C. who D. how

5.A. before B. after C. while D. as

6.A. street B. path C. way D. road

7.A. came B. answered C. opened D. appeared

8.A. asking B. looking C. calling D. waiting

9.A. Gas B. Coffee C. Tea D. Lunch

10.A. consider B. understand C. accept D. think

11.A. like B. love C. used to like D. enjoy

12.A. answered B. explained C. refused D. promised

13.A. gas B. tea C. strength D. energy

14.A. calling B. call C. to call D. called

15.A. until B. before C. since D. when

16.A. could B. can C. would D. should

17.A. Unfortunately B. Absolutely C. Fortunately D. Seriously

18.A. accident B. event C. experience D. surprise

19.A. hit B. injure C. hurt D. frighten

20.A. never B. ever C. yet D. still

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：2016屆浙江寧波效實(shí)中學(xué)高三上期中英語(yǔ)試卷（解析版） 題型：單項(xiàng)填空

Nowadays, an increasing number of museums are open to visitors free. However, free ______ might lead to some social problems as well.

A. accommodation B. attraction

C. admission D. adjustment

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：2016屆山東日照第一中學(xué)高三上期中英語(yǔ)試卷（解析版） 題型：其他題

根據(jù)短文內(nèi)容, 從短文后的選項(xiàng)中選出能填入空白處的最佳選項(xiàng)。選項(xiàng)中有兩項(xiàng)為多余選項(xiàng)。

While serious training is important for all dogs, playtime is just as important. 1. Use these games to help teach your dog how to play.

1. Hide and Seek

Hide and seek isn’t just for kids. Dogs can really enjoy this game. Pick up one of your dog’s favorite toys or treats. Tell your dog to stay. 2. When you are ready, call your dog to come to you. If possible, squeak (使吱吱叫) the toy or shake the treats. Reward your dog with praise and the toy or treat when she finds you.

2. Fetch

Many dogs have a natural ability to fetch. Other dogs can be taught how. 3. Play indoors with a soft toy or outdoors in a fenced-in area with a ball or disc. For dogs that really love to run, try this game of fetch!

3. Find the Treat

Dogs have superior senses of smell, and most love to use their noses to find food. Let your dog use her brain and her nose to find hidden goodies. First, have your dog stay out of sight. Then, hide her favorite treats in various places around the room. 4. If help is needed, you can lead her around or point to areas for her to explore.

Whatever the game, safety comes first! Remember to watch your dog for signs of exhaustion or overheating when you are playing. Stop if your dog seems tired or shows signs of anxiety. 5. When other dogs or people are around, it may create a dangerous distraction.

A. Then, go to find a good hiding place.

B. Try different games to see which your dog responds to best.

C. A good game of fetch can be played almost anywhere.

D. You can include games in training as well.

E. Also be aware of your surroundings when playing with your dog.

F. Encourage your dog to play with other dogs.

G. Bring your dog back in and tell her to “go find!”

查看答案和解析>>

同步練習(xí)冊(cè)答案