游客
题文

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!
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.

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

The underlined word “drawbacks” probably means ______.

A.regrets B.adventures C.disadvantages D.difficulties

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
科目 英语   题型 阅读理解   难度 中等
登录免费查看答案和解析
相关试题

If you're networking (建立人际关系) and nothing is happening, you might need to evaluate how you're doing it. Maybe you show up at each event and still feel challenged by the process. You aggressively talk to people, give out your cards, call endlessly to schedule an appointment but have no real success from your efforts. To help you gain a different future, here are ten habits you should avoid.
Ineffective networkers:
1. Lack patience. They expect immediate results and want business now, not tomorrow.
2. Constantly “selling” something. They see dollar signs every time they shake hands with someone.
3. Too many choices. If they offer a variety of products, they might try too hard to tell about all of them. Offering too much information sends a confusing message making it difficult for people to send referral (指点). Opportunities are all around us but when you're networking, only focus on one.
4. Change positions too often. If they move from company to company or do something totally different, it might be difficult for people to keep up with them.
5. Lack manners and respect. They interrupt others, talk with food in their mouth, aren't very polite and appear unprofessional. They call people during dinner or on the weekends without thinking whether the occasion is suitable.
6. Distribute too many cards and sales literature. They come while loading with brochures, flyers (传单), catalogues and samples.
7. Focus on themselves. Too much self promotion can leave the other person to feel unappreciated. Every sentence begins with “I” and is all about their business.
8. “Talking” instead of “giving”. They don't realize what other people sense when they are being very selfish. Others may think that they are being taken advantage of.
9. Lack authenticity (可靠性) and personal values. They may create unrealistic expectations and not deliver on their promises. Sometimes doing things without integrity (诚实) possibly twists the truth.
10. Poor communication and interpersonal skills. They have trouble speaking effectively, building relationships and following up.
Networking is a process that is an investment of time and money. If you find you're doing any of these habits, consider learning how to improve on these and maximize your results while networking. You'll start to get better at connecting with people and obtain more referrals.
This passage is meant for people who ______.

A.want to do more businesses
B.often take instead of giving
C.have poor communication and interpersonal skills
D.want to improve their interpersonal relationship

According to the second habit, we shouldn't ______ when we are networking.

A.sell things B.talk about dollars
C.pay attention to money only D.shake hands with everyone

When talking with others, you should ______.

A.give out your cards and brochures every now and then
B.talk about the quality of your product as much as possible
C.interrupt others when they make a mistake
D.let other people express themselves completely

Which of the following is NOT correct about a salesman's behavior?

A.He offers too much selfpromotion during the conversation.
B.He considers carefully when he can get what he expects.
C.He only focuses on one opportunity when networking.
D.He keeps his promises and doesn't expect too much from others.

It's a name that needs no address.Everyone knows Santa Claus lives at the North Pole.
So letters sent to Santa Claus find their way to the small town of the North Pole deep in Alaska,including those simply sent to Santa. Last year,120,000 letters arrived from 26 countries,not including the thousands with no return addresses.

Those who have return addresses usually get a reply and a North Pole postmark(邮戳) that has delighted children all over the world for many years. They feel happy to receive Santa's reply.
Letters arrive all the year around in the town of 1,600,where streets have names such as Santa Claus Lane and Kris Kringle Drive. Around Thanksgiving,they start getting there by the thousands each day as Christmas comes. Even letters without stamps get through,an exception(例外)for the U.S. Postal Service.
“This is special because it has Santa's name on it,”said Debra Cornelius,an officer at the main post office in nearby Fairbanks,where the letters are kept during the holiday.
Gabby Gaborik is among several dozen volunteers who are busy sending off replies to children who sent return addresses.
In his 10 years as a volunteer,Gaborik has seen every kind of wish. There are children who want the latest toys they see on TV. There are children who ask for miracles(奇迹),some wanting their mother back for Christmas or their father back from Iraq,even though he died there.
Replies get a North Pole postmark,including a halfmoon drawing of Santa's face. Even late letters get a reply,Gaborik said,“It says something like ‘Thanks for writing. Santa's been really busy,’anything the children might want to hear,”he said.
Letters written to Santa Claus without an address can arrive at the North Pole because ______.

A.all letters without an address are sent there
B.people believe that Santa Claus lives there
C.this kind of letter is sent with a special postmark
D.streets named Santa Claus Lane can be found there

The underlined word “delighted” in Paragraph 3 can be replaced by “______”.

A.excited B.amazed C.confused D.disappointed

We can know from the text that ______.

A.letters written to Santa Claus are sent free
B.Santa Claus' replies to children always arrive at Christmas
C.many people write to children for Santa Claus asking for no pay
D.there're thousands of letters sent to Santa Claus every month

What's the best title for the text?

A.Letters written to parents
B.All kinds of wishes from children
C.Letters to Santa Claus rush into Alaska
D.North Pole,Alaska,a beautiful place

Dear Mayor,
I would like to draw your attention to the depressing state of the environment in our city. Increased vehicles have made the air polluted. Citizens find it difficult to breathe. Dumping toxic chemicals into the river has polluted the drinking water and ground water.
All of us, as concerned citizens, have discussed these problems in various meetings. We have come up with the following proposals(提议).
The green roads are no longer green. Many trees and bushes have been cut. We propose restricting the movement of vehicles. Besides, we should make it compulsory(强制性的)to use anti-pollution devices on all vehicles. We should also plant more plants and trees along roads.
The Bada Nadi River has become a dumping ground of toxic chemicals from some factories. These toxic chemicals have killed nearly all the life in the river and polluted our drinking water and ground water. We propose that the Bada Nadi River be declared a protected water body. All the dumping should be banned and heavy fine should be imposed on the offenders(违法者). To tackle the problem of managing toxic waste, we propose setting up a water treatment plant so that only clean water is discharged into the river. Cleaning up the river and introducing various fishes and plants to the river will bring it back to life.
Lastly, the noise pollution caused by honking(鸣)horns and blaring loudspeakers has caused distress to one and all. Many people have suffered from noise-related illnesses. We propose a blanket ban on the use of loudspeakers. And“no horn zones”should also be declared in residential hospitals and school areas.
I would request you to seriously consider our proposals and act accordingly.
Thank you!
Sincerely yours,
A kind-hearted citizen
The author wrote this letter in order to ______.

A.express his/her thanks to the mayor
B.complain about the environment
C.share his/her opinions about city life
D.make his/her suggestions on managing toxic waste

In order to protect the Bada Nadi River, the author suggests _______.

A.anti-pollution devices should be used on vehicles
B.planting more trees and bushes along roads
C.restricting the movement of vehicles
D.banning dumping dangerous chemicals into the river

The underlined word “tackle”in the fourth paragraph means“_______”.

A.put off B.deal with
C.set up D.turn down

Kodak’s decision to file for bankruptcy (破产) protection is a sad, though not unexpected, turning point for a leading American corporation that pioneered consumer photography and dominated the film market for decades, but ultimately failed to adapt to the digital revolution.
Although many attribute Kodak’s downfall to “complacency (自满) ,” that explanation doesn’t acknowledge the lengths to which the company went to reinvent itself. Decades ago, Kodak predicted that digital photography would overtake film (胶片) — and in fact, Kodak invented the first digital camera in 1975 — but in a fateful decision, the company chose to shelf its new discovery to focus on its traditional film business.
“It wasn’t that Kodak was blind to the future”, said Rebecca Henderson, a professor at Harvard Business School, but rather that it failed to execute on a strategy to confront it. By the time the company realized its mistake, it was too late.
Kodak is an example of a firm that was very much aware that they had to adapt, and spent a lot of money trying to do so, but ultimately failed. Large companies have a difficult time switching into new markets because there is a temptation to put existing assets (资产) into the new businesses.
Although Kodak predicted the unavoidable rise of digital photography, its corporate (企业的) culture was too rooted in the successes of the past for it to make the clean break necessary to fully embrace the future. They were a company stuck in time. Their history was so important to them. Now their history has become a liability.
Kodak’s downfall over the last several decades was dramatic. In 1976, the company commanded 90% of the market for photographic film and 85% of the market for cameras. But the 1980s brought new competition from Japanese film company Fuji Photo, which undermined Kodak by offering lower prices for film and photo supplies. Kodak’s decision not to pursue the role of official film for the 1984 Los Angeles Olympics was a major miscalculation. The bid went instead to Fuji, which exploited its sponsorship to win a permanent foothold in the marketplace.
What do we learn about Kodak?

A.It went bankrupt all of a sudden.
B.It is approaching its downfall.
C.It initiated the digital revolution in the film industry.
D.It is playing a dominant role in the film market.

Why does the author mention Kodak’s invention of the first digital camera?

A.To show its early attempt to reinvent itself.
B.To show its effort to overcome complacency.
C.To show its quick adaptation to the digital revolution.
D.To show its will to compete with Japan’s Fuji photo.

Why do large companies have difficulty switching to new markets?

A.They find it costly to give up their existing assets.
B.They tend to be slow in confronting new challenges.
C.They are unwilling to invest in new technology.
D.They are deeply stuck in their glorious past.

What does the author say Kodak’s history has become?

A.A burden. B.A mirror. C.A joke. D.A challenge.

People who multitask all the time may be the worst at doing two things at once, a new research suggests. The findings, based on performances and self-evaluation by about 275 college students, indicate that many people multitask not out of a desire to increase productivity, but because they are easily distracted and can’t focus on one activity. And “those people turn out to be the worst at handling different things,” said David Sanbonmatsu, a psychologist at the University of Utah.
Sanbonmatsu and his colleagues gave the students a set of tests and asked them to report how often they multitasked, how good they thought they were at it, and how sensation-seeking (寻求刺激) or imperative (冲动) they were. They then evaluated the participants’ multitasking ability with a tricky mental task that required the students to do simple mathematical calculations while remembering a set of letters.
Not surprisingly, the scientists said, most people thought they were better than average at multitasking, and those who thought they were better at it were more likely to report using a cellphone while driving or viewing multiple kinds of media at once. But those who frequently deal with many things at the same time were found to perform the worst at the actual multitasking test. They also were more likely to admit to sensation-seeking and impulsive behavior, which connects with how easily people get bored and distracted.
“People multitask not because it’s going to lead to greater productivity, but because they’re distractible, and they get sucked into things that are not as important.” Sanbonmatsu said.
Adam Gazzaley, a researcher at the University of California, San Francisco, who was not a member of the research group, said one limitation of the study was that it couldn’t find out whether people who start out less focused tend toward multitasking or whether people’s recognizing and understanding abilities change as a result of multitasking.
The findings do suggest, however, why the sensation-seeker who multitask the most may enjoy risky distracted driving. “People who are multitasking are generally less sensitive to risky situations.” said Paul Atchley, another researcher not in the group. “This may partly explain why people go in for these situations even though they’re dangerous.”
The research led by Sanbonmatsu indicates that people who multitask __________.

A.seek high productivity constantly
B.prefer handling different things when getting bored
C.are more focused when doing many things at a time
D.have the poorest results in doing various things at the same time

When Sanbonmatsu and his colleagues conducted their research, they __________.

A.assessed the multitasking ability of the students
B.evaluated the academic achievements of the students
C.analyzed the effects of the participants’ tricky mental tasks
D.measured the changes of the students’ understanding ability

According to Sanbonmatsu, people multitask because of their __________.

A.limited power in calculation
B.interests in doing things differently
C.inability to concentrate on one task
D.impulsive desire to try new things

From the last paragraph, we can learn that multitaskers usually __________.

A.drive very skillfully
B.go in for different tasks
C.fail to react quickly to potential dangers
D.refuse to explain the reasons for their behavior

Copyright ©2020-2025 优题课 youtike.com 版权所有

粤ICP备20024846号