When you tidy your messy bedroom，it gets a lot easier to find things.Dreams may work the same way for a messy brain，helping you learn by organizing memories and ideas.
To test how much dreams can help learning，Robert Stickgold had some students play a shapefitting game called Tetris (俄罗斯方块) for a few hours and then go to sleep.Soon they were dreaming of falling Tetris shapes.Interestingly，the worst Tetris players had the most Tetris dreams and improved their game the most.Similar tests have shown the same results for all kinds of skills.
As we dream，many important tasks are getting done.The brain decides what to keep and what to forget.It is connecting new experiences to older learning.In fact，the brain is learning all night long.
Another important task of dreams may be to help us deal with emotions (情绪)．At night，emotions are in the driver’s seat.People who have had an upsetting experience often dream about it afterward.Often the dream event changes somehow—another way the brain tries to make the memory less upset.So if your best friend moves away，you might dream that you’re the one who’s moving.In fact，dreams have a proven power to improve mood，and people who dream about what’s bothering them usually feel better sooner than those who don’t.
Everybody dreams for a couple of hours every night—in the course of your life，you’ll spend about 25 years asleep and 6 years dreaming.There’s probably no single answer to the question why we dream，but there doesn’t have to be.One dream might help you remember your math facts，while another might lead to a new invention，or give you a fun，crazy story to tell your friends.It’s all in a night’s work for our busy，mysterious brains.
【小题1】Robert Stickgold’s test shows that________.
| A．games are useful for memory |
| B．dreams can help improve skills |
| C．players stop learning in dreams |
| D．tasks can only be settled through dreams |
| A．dreams can get rid of sufferings |
| B．only drivers can deal with emotions |
| C．one may be less upset after a dream |
| D．dreams can copy what one experienced |
| A．Dreaming does harm to one’s mood. |
| B．Dreaming affects the quality of sleep. |
| C．It’s hard to find out the secrets of dreaming. |
| D．It’s not so important to know the cause of dreaming. |
| A．Dreams and memories. | B．Dreams and emotions. |
| C．The benefits of dreams. | D．The patterns of dreams. |
| A．Entertainment. | B．Tourism. |
| C．Science. | D．Advertisement. |
【小题1】B
【小题2】C
【小题3】D
【小题4】C
【小题5】C
解析语篇解读 本文是一篇说明文。文章说明了梦的好处，即可以改善学习和情绪。
【小题1】解析： 推理判断题。根据第二段可知，为了证实梦对学习有帮助，Robert Stickgold做了这次实验，而实验结果表明选手的技能有所提高，根据本段最后一句“Similar tests have shown the same results for all kinds of skills.”可推知，梦对学习各种技能都是有帮助的，故选B。
答案： B
【小题2】解析： 细节理解题。根据第四段第一句“Another important task of dreams...emotions (情绪)．”和最后一句“In fact，dreams have a proven power to improve mood...”可知，梦有助于改善心情，故选C。
答案： C
【小题3】解析： 细节理解题。根据最后一段第二句“There’s probably no single answer to the question why we dream，but there doesn’t have to be.”可知，作者认为关于我们为什么会做梦的解释不止一个，但也没必要非要有一个解释。
答案： D
【小题4】解析： 主旨大意题。通读全文可知，本文主要说明了梦的好处：有助于改善学习和情绪。
答案： C
【小题5】解析： 推理判断题。根据文章主旨可知，文章是关于梦的科学研究方面的知识，所以最可能在杂志的有关科学的栏目里找到此文章，故选C。
答案： C
轻松暑假总复习系列答案科目：高中英语 来源： 题型：阅读理解
People in several American states may be surprised to see cars on city streets without a driver. Experimental driverless vehicles now are legal in Florida, Nevada and California. They are pointing the way to a future that is not far down the road. The high-tech company Google has a number of self-driving cars, which had covered 480,000 kilometers by August. Volvo is among the companies doing road tests and says it plans to sell driverless cars by 2020.
In September, California Governor Jerry Brown signed an act to allow autonomous vehicles on the roads of his state. “Today we’re looking at science fiction becoming tomorrow’s reality—the driverless car.” The technology for these cars includes cameras, radar and motion sensors. The systems have been improved through competitions sponsored by the US government agency DARPA. Engineer Richard Mason of the Rand Corporation helped design driverless vehicles for DARPA challenge races.
“Cars have become much more fuel-efficient, and new electronic features are making Hondas safer,” said Angie Nucci of Honda America. “A camera on the passenger-side mirror actually engaged on your guiding screen so you can safely change lanes.” Other safety features include warning systems on the front and the sides of the cars. These systems help drivers, but don’t replace them. Curator Leslie Kendall of the Petersen Automotive Museum said autonomous cars will make the high ways safer．
“By taking out drivers, you also remove most risks of an accident,” Kendall said. He said consumers, however, may be unwilling to lose control. “It may take them time to come to realize that the technology is indeed reliable, but it will have to prove itself first.”
Mason said the technology already works and the biggest challenge now is getting down the cost for driverless vehicles from hundreds of thousands of dollars to something more affordable. He said this will happen as the technology is improved.
【小题1】What can we learn from Paragraph l?
A. Volvo will be the first to sell driverless cars.
B. Driverless cars are pointing us a faraway future.
C. Driverless vehicles are now legal in the whole USA.
D. Google’s self-driving cars have covered a long distance.
【小题2】We learn that Governor of California Jerry Brown_________.
| A．helped design self-driving cars |
| B．supports self-driving cars on roads |
| C．considers self-driving cars science fiction |
| D．improved the self-driving car systems |
| A．They are not allowed to run on the road. |
| B．Their technical problems remain to be solved. |
| C．They are now too expensive for consumers. |
| D．They are more dangerous for people on the street. |
| A．The Benefits of the Self-driving Cars |
| B．The Biggest Challenge of the Self-driving Cars |
| C．Safer or More Dangerous Self-driving Cars |
| D．Self-driving Cars—Science Fiction Future Is Near |
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科目：高中英语 来源： 题型：阅读理解
Passenger pigeons（旅鸽）once flew over much of the United States in unbelievable numbers. Written accounts from the 18th and 19th centuries described flocks（群）so large that they darkened the sky for hours.
It was calculated that when its population reach its highest point, there were more than 3 billion passenger pigeons – a number equal to 24 to 40 percent of the total bird population in the United States, making it perhaps the most abundant birds in the world. Even as late as 1870 when their numbers had already become smaller, a flock believed to be 1 mile wide and 320 miles (about 515 kilometers) long was seen near Cincinnati.
Sadly, the abundance of passenger pigeons may have been their undoing. Where the birds were abundant, people believed there was an ever-lasting supply and killed them by the thousands. Commercial hunters attracted them to small clearings with grain, waited until pigeons had settled to feed, then threw large nets over them, taking hundreds at a time. The birds were shipped to large cities and sold in restaurants.
By the closing decades of the 19th century, the hardwood forests where passenger pigeons nested had been damaged by Americans’ need for wood, which scattered（驱散）the flocks and forced the birds to go farther north, where cold temperatures and spring storms contributed to their decline. Soon the great flocks were gone, never to be seen again.
In 1897, the state of Michigan passed a law prohibiting the killing of passenger pigeons, but by then, no sizable flocks had been seen in the state for 10 years. The last confirmed wild pigeon in the United States was shot by a boy in Pike County, Ohio, in 1900. For a time, a few birds survived under human care. The last of them, known affectionately as Martha, died at the Cincinnati Zoological Garden in September 1, 1914.
【小题1】In the 18th and early 19th centuries, passenger pigeons _______.
| A．were the biggest bird in the world |
| B．lived mainly in the south of America |
| C．did great harm to the natural environment |
| D．Were the largest population in the US |
| A．escape | B．ruin | C．liberation | D．evolution |
| A．To seek pleasure. | B．To save other birds. |
| C．To make money. | D．To protect crops. |
| A．It was ignored by the public. | B．It was declared too late. |
| C．It was unfair. | D．It was strict. |
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科目：高中英语 来源： 题型：阅读理解
How fit are your teeth? Are you lazy about brushing them? Never fear: An inventor is on the case. An electric toothbrush senses how long and how well you brush, and it lets you track your performance on your phone.
The Kolibree toothbrush was exhibited at the International Consumer Electronics Show in Las Vegas this week. It senses how it is moved and can send the information to an Android phone or iPhone via a Bluetooth wireless connection.
The toothbrush will be able to teach you to brush right (don’t forget the insides of the teeth!) and make sure you’re brushing long enough. “It’s kind of like having a dentist actually watch your brushing on a day-to-day basis,” says Thomas Serval, the French inventor.
The toothbrush will also be able to talk to other applications on your phone, so developers could, for instance, create a game controlled by your toothbrush. You could score points for beating monsters among your teeth. “We try to make it smart but also fun,” Several says.
Serval says he was inspired by his experience as a father. He would come home from work and ask his kids if they had brushed their teeth. They said “yes,” but Serval would find their toothbrush heads dry. He decided he needed a brush that really told him how well his children brushed.
The company says the Kolibree will go on sale this summer, for $99 to $199, developing on features. The U.S. is the first target market.
Serval says that one day, it’ll be possible to replace the brush on the handle with a brushing unit that also has a camera. The camera can even examine holes in your teeth while you brush.
【小题1】Which is one of the feature of the Kolibree toothbrush?
| A．It can sense how users brush their teeth. |
| B．It can track users’ school performance. |
| C．It can detect users’ fear of seeing a dentist. |
| D．It can help users find their phones. |
| A．You will find it enjoyable to see a dentist. |
| B．You should see your dentist on a day-to –day basis. |
| C．You can brush with the Kolibree as if guided by a dentist. |
| D．You’d like a dentist to watch you brush your teeth every day. |
| A．It can be used to update mobile phones. |
| B．It can be used to play mobile phone games |
| C．It can send messages to other users |
| D．It can talk to its developers. |
| A．How Serval found out his kids lied to him. |
| B．Why Serval thought brushing teeth was necessary. |
| C．How Serval taught his kids to brush their teeth. |
| D．What inspired Serval to invent the toothbrush |
| A．They were unwilling to brush their teeth |
| B．They often failed to clean their toothbrushes. |
| C．They preferred to use a toothbrush with a dry head. |
| D．They liked brushing their teeth after Serval came home. |
| A．The brush handle will be removed. |
| B．A mobile phone will be built into it. |
| C．It will be used to fill holes in teeth |
| D．It will be able to check users’ teeth |
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科目：高中英语 来源： 题型：阅读理解
The forces that make Japan one of the world’s most earthquakeprone (有地震倾向的) countries could become part of its longterm energy solution.
Water from deep below the ground at Japan’s tens of thousands of hot springs could be used to produce electricity.
Although Japanese hightech companies are leaders in geothermal (地热的) technology and export it，its use is limited in the nation.
“Japan should no doubt make use of its resources of geothermal energy，” said Yoshiyasu Takefuji，a leading researcher of thermalelectric power production.
The disastrous earthquake and tsunami on March 11,2011 caused a reaction against atomic power，which previously made up 30 percent of Japan’s energy needs，and increased interest in alternative energies，which accounted for only 8 percent.
Artist Yoko Ono has called on Japan to explore its natural energy，following the example of Iceland which uses renewable energy for more than 80 percent of its needs.
For now，geothermal energy makes up less than 1 percent of the energy needs in Japan，which has for decades relied heavily on fossil fuels and atomic power.
The biggest problem to geothermal energy is the high initial cost of the exploration and constructing the factories.Another problem is that Japan’s potentially best sites are already being developed for tourism or are located within national parks where construction is forbidden.
“We can’t even dig 10 cm inside national parks.” said Shigeto Yamada of Fuji Electric，adding that regulations protecting nature would need to be relaxed for geothermal energy to grow.
Researcher Hideaki Matsui said，“Producing electricity using hot springs is a decadeslong project.We also have to think about what to do for now as energy supplies will decline in the short term.”
The Earth Policy Institute in Washington，US，believed Japan could produce 80 000 megawatts (兆瓦) and meet more than half its electricity needs with geothermal technology.
Japanese giants such as Toshiba are already global leaders in geothermal technology，with a 70 percent market share.In 2010，Fuji Electric built the world’s largest geothermal factory in New Zealand.
【小题1】What would be the best title for the text?
| A．Alternative energies in Japan |
| B．World’s largest geothermal plant |
| C．Japan takes the lead in geothermal technology |
| D．Japan thinks of geothermal energy |
| A．About 8%. | B．Below 1%. |
| C．Around 30%. | D．Over 80%. |
| A．a change of rules | B．financial support |
| C．local people’s help | D．high technology |
| A．Yoshiyasu Takefuji | B．Hideaki Matsui |
| C．Shigeto Yamada | D．Yoko Ono |
| A．the world’s biggest geothermal plant was built by America |
| B．Japan will not export its geothermal technology |
| C．the potential of Japan’s geothermal energy is great |
| D．it is hard to find geothermal energy in Japan |
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科目：高中英语 来源： 题型：阅读理解
We sometimes think global warming or climate change is a problem very far away from our lives, and that only the government needs to worry about it. But it's hardly possible to completely stay out of it scientists are now 95 percent sure that humans have been the “dominant cause” of global warming trends since the 1950s.
One of the conclusions of a report released on Sept 27 by the United Nations says that human activities have caused global temperatures to rise by 0.89 0C between 1901 and 2012. That might not seem like a lot, but the truth is that a major part of that heat has been absorbed into the oceans, which is not surprising given that they cover two thirds of Earth's surface. Also, water has a much greater capacity (容量) to absorb heat than the air does, according to The Economist.
While many greenhouse gases occur naturally and are needed to keep the Earth warm enough to support life, humans' use of fossil fuels is the main source of excess (多余的) greenhouse gases. According to CNN, by driving cars, using electricity produced by burning coal and oil or heating our homes with coal or natural gas, we release a large amount of greenhouse gases into the atmosphere.
Your body can barely feel a difference of 0.89 0C, but the Earth's ecosystems are so sensitive that even small changes can disturb them. It often starts with the smallest creatures at the bottom of the food chain, eventually affecting bigger animals, many of which could end up becoming extinct.
Global warming is also linked to an increase in extreme weather. A larger amount of carbon dioxide traps more energy inside the atmosphere. This changes the patterns of storms and rainfall in many regions and can lead to droughts and floods. Worse still, melting sea ice in warmer oceans is causing sea levels to rise at a speed of more than three millimeters per year, according to The Guardian, which also increases the risk of flooding.
“The report should serve as another wakeup call that our activities today have a profound impact on society, not only for us, but for many generations to come，” French Michel Jarraud, secretarygeneral of the World Meteorological Organization, said at a news conference.
【小题1】The underlined word “dominant” in the first paragraph means “ ________”．
| A．common | B．indirect |
| C．secondary | D．leading |
| A．Greenhouse gases have been proven to harm merely the Earth . |
| B．There is little we can do to prevent global warming. |
| C．Global warming can increase the chances of droughts and floods. |
| D．The hugeness of oceans makes them better absorbers of heat than the air. |
| A．is more harmful to smaller creatures than bigger ones |
| B．is not serious because most of the extra heat has been absorbed by the oceans |
| C．has made the Earth's ecosystems more sensitive to changes |
| D．is likely to cause many species to become extinct |
| A．Negative. | B．Supportive. |
| C．Doubtful. | D．Uninterested. |
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科目：高中英语 来源： 题型：阅读理解
In the future your automobile will run on water instead of gas! You will be able to buy a supercomputer that fits in your pocket! You might even drive a flying car!
For each prediction that has come true today, several others have missed by a mile. Many of these predictions didn’t consider how people would want to use the technology, or whether people really needed it in their lives or not. Let’s look at some predictions from the not-too-distant past.
Robot Helpers
Where’s the robot in my kitchen? Nowhere, of course. And he’s probably not coming anytime soon. Robots do exist today, but mostly in factories and other manufacturing environments.
Back in the 1950s, however, people said that by now personal robots would be in most people’s homes.
So why hasn’t it happened? Probably because robots are still too expensive and clumsy. And maybe the idea of robots cooking our dinners and washing our clothes is just too weird. At home we seem to be doing fine without them.
Telephones of Tomorrow
In 1964 an American company introduced the video telephone. They said by the year 2000 most people would have a video phone in their homes. But of course the idea hasn’t caught on yet.
Why? The technology worked fine, but it over-looked something obvious: people’s desire for privacy. Would you want to have a video phone conversation with someone after you just step out of the shower? Probably not—it could be embarrassing! Just because a technology available doesn’t always mean people will want to use it.
And finally, how about that crazy prediction of the flying car? It’s not so crazy anymore! But a flying car remains one of the most fascinating technology ideas to capture our imagination. Keep watching the news, or perhaps the sky outside your window, to see what the future will bring.
【小题1】The whole passage is mainly about .
| A．predictions that have come true |
| B．predictions that haven’t come true |
| C．why predictions don’t come true easily |
| D．what technology will bring about |
| A．predictions needn’t consider people’s practical use of technology |
| B．the future isn’t always easy to guess |
| C．not all past predictions have come true |
| D．many of the high-tech things our parents thought we’d be using by now simply never appeared |
| A．wonderful | B．stupid |
| C．practical | D．strange |
| A．It is too difficult to imagine. |
| B．It is too crazy an idea. |
| C．It is likely to be made. |
| D．It is often reported in the news. |
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科目：高中英语 来源： 题型：阅读理解
Ten years ago, with only about 1, 000 pandas left in the world, China was desperately trying to clone(克隆)the animal and save the endangered species(物种). That was a move similar to what Texas A & M University researchers had been undertaking for the past five years in a project called “Noah’s Ark”(诺亚方舟).
Noah’s Ark was aimed at collecting eggs, embryos(胚胎), semen and DNA of endangered animals and storing them in liquid nitrogen. If certain species should become extinct, Dr. Duane Kraemer, a professor in Texas A & M’s College of Veterinary Medicine, said there would be enough of the basic building blocks to reintroduce the species in the future. 
It was estimated that as many as 2, 000 species of mammals, birds reptiles would become extinct in over 100 years. The panda, native only to China, was in danger of becoming extinct in the next 25 years.
This week, Chinese scientists said they grew an embryo by introducing cells from a dead female panda into the egg cells of a Japanese white rabbit. They were then trying to implant the embryo into a host animal.
The entire procedure could take from three to five years to complete.
“The nucleus transfer(核子移植)of one species to another is not easy, and the lack of available(capable of being used)panda eggs could be a major problem,”Kraemer believed. “They will probably have to do several hundred transfers to result in one pregnancy(having a baby). It takes a long time and it’s difficult, but this could be groundbreaking science if it works. They are certainly not putting any live pandas at risk, so it is worth the effort, ”added Kraemer, who was one of the leaders of the project at Texas A& M, the first-ever attempt at cloning a dog.
“They are trying to do something that’s never been done, and this is very similar to our work in Noah’s Ark. We’re both trying to save animals that face extinction. I certainly appreciate their effort and there’s a lot we can learn from what they are attempting to do. It’s a research that is very much needed. ”
At present, the project has worked. The number of the pandas has increased to more than 1, 500.
【小题1】The aim of “Noah’s Ark” project was to .
| A．make efforts to clone the endangered pandas |
| B．save endangered animals from dying out |
| C．collect DNA of endangered animals to study |
| D．transfer the nucleus of one animal to another |
| A．available panda eggs | B．host animals |
| C．qualified researchers | D．enough money |
| A．China’s Success in Pandas Cloning |
| B．The First Cloned Panda in the World |
| C．Exploring the Possibility to Clone Pandas |
| D．China—the Native Place of Pandas Forever |
| A．Kraemer and his team had succeeded in cloning a dog |
| B．scientists tried to implant a panda’s egg into a rabbit |
| C．Kraemer would work with Chinese scientists in clone researches |
| D．about two thousand species would probably die out in a century |
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科目：高中英语 来源： 题型：阅读理解
Why is pink or purple a color for girls and blue or brown for boys?
The answer depends largely on cultural values as well as personal experiences. To the Egyptians, green was a color that represented the hope and joy of spring, while for Muslims, it means heaven. Red is a symbol of good luck in many cultures. In China, children are given money in a red envelope to bring good fortune in the New Year. For many nations, blue is a symbol of protection and religious beliefs. Greek people often wear a blue necklace hoping to protect themselves against evils（灾祸）.
People’s choice of colors is also influenced by their bodies’ reactions （反应）toward them. Green is said to be the most restful color. It has the ability to reduce pain and relax people both mentally and physically. People who work in green environment have been found to have fewer stomach aches.
Red can cause a person’s blood pressure to rise and increase people’s appetites（食欲）. Many decorators will include different shades of red in the restaurant. Similarly, many commercial websites will have a red “Buy Now” button because red is a color that easily catches a person’s eye.
Blue is another calming color. Unlike red, blue can cause people to lose appetite. So if you want to eat less, some suggest that eating from blue plates can help.
The next time you are deciding on what to wear or what color to decorate your room, think about the color carefully.
【小题1】Muslims regard green as a symbol of heaven mainly because of their .
| A．cultural values |
| B．commercial purposes |
| C．personal experiences |
| D．physical reactions to the color |
| A．To relax people physically. |
| B．To increase people’s appetites. |
| C．To encourage people to make a purchase. |
| D．To cause a person’s blood pressure to rise. |
| A．Red | B．Green. | C．Blue. | D．Purple. |
| A．Colors and Human Beings |
| B．The Cultural Meaning of Color |
| C．Colors and Personal Experiences |
| D．The Meaning and Function of Color |
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