A scientist is now working on sending visual ...

A scientist is now working on sending visual information to the brain, so that the blind _____ “see”.

A. can be able to            B. is able to

C. could be able to          D. could able to

高三英语单项填空困难题查看答案及解析

On October 12,1989，some British scientists were working at the computers to look for the information they needed.Suddenly they saw a lot of very bright points crossing the computer screens.At the same time the computers were working much slower.To find out what was happening they stopped their work to check some parts of the computers.To their horror，they found out that most of their stored information was got rid of by computer viruses(病毒)！Clearly all these computers had been infected by computer viruses.

It is said that the computer viruses were made by a group of young men fond of playing tricks.They all had excellent education.They created the viruses just to show their intelligence. These kinds of computer viruses are named Jerusalem Viruses.These viruses can stay in computers for a long time.When the time comes they will attack(袭击)the computers by lowering the functions，damaging their normal programs or even getting rid of all the information.

We now come to know that Jerusalem Viruses often attack computers on Friday and that they are spreading(传播)to a lot of computers.Among the countries that were attacked by computer viruses last year are Britain，Australia，Switzerland and the U．S.But till now，how to get rid of the terrible viruses remains a problem.

1.When the viruses attack the computers，the computers will work________.

A．normally　 B．slowly　 C．faster　 D．well

2.The group of young men created the viruses to________.

A. damage the computers　　

B. test their ability

C. tell people that they were intelligent　

D. play a trick on users of the computers

3.According to the passage，computer viruses seem to ________.

A. have been in nature for years

B. stay in any computers

C. be difficult to get rid of at present

D. be able to be got rid of in the near future

4.According to the passage，which of the following is TRUE?

A. Last year six countries found their computers were infected by viruses.

B. The viruses will come to a new computer after staying in the old one for some time.

C. Scientists are trying to find a way to get rid of the viruses.

D. The Jerusalem Viruses are dangerous to human health.

高三英语阅读理解中等难度题查看答案及解析

Scientists say they now have proof to support the old-fashioned advice that it’s best to sleep on a problem．They say sleep strengthens the memory and helps the brain organize the masses of information we receive each day．

The lead researcher Bob Stickgold at the Harvard Medical School said, “Sleep helps us draw rules from our experiences．It’s like knowing the difference between dogs and cats even if it’s hard to explain．”

The US research team studied how well students remembered connections between words and symbols, reports New Scientist．They compared how the students performed if they had had a sleep between seeing the words and having the test, and if they had not slept．They found that people were better able to remember lists of related words after a night’s sleep than after the same time spent awake during the day．They also found it easier to remember themes that the words had in common．But they forgot around one in four more themes if they had been awake．

Prof．John Groeger, of Survey University’s Sleep Research Centre, said, “People have been trying for years to find out what the purpose of sleep is, as we know that only certain parts of it have a restorative （促使康复的）value．”

“We form and store huge numbers of experiences in the head every day, and sleep seems to be the way the brain deals with them all．”

1.The phrase “to sleep on a problem” in Paragraph 1 most likely means “________”．

A．to pay full attention to a problem

B．to wait until the next day for a decision

C．to sleep to forget a problem

D．to have difficulty in sleeping

2.In the study by the US research team, students were asked to ________．

A．put together words of similar meanings

B．remember words and their meanings

C．show their knowledge of words

D．make up lists of related words

3.Which of the following may be easier to remember?

A．Themes learned right before the test．

B．Rules from personal experiences．

C．Words learned before a good sleep．

D．Ideas stored together in the brain．

4.What may be the importance of the research?

A．It shows that sleep may help us manage information．

B．It helps find out the common themes of words．

C．It tells us that more sleep can improve health．

D．It proves the value of old-fashioned advice．

高三英语阅读理解中等难度题查看答案及解析

Even if you don't have to work, eat or sleep, you won't be able to get through all information on blogs and social networks. The problem we face is that much of this information seems very interesting at first glance. Actually, much of the information is unimportant, disposable and it distracts us from more meaningful pursuits. Worse still, when we spend lots of time consuming information from our social media streams, we may find it hard to concentrate on what we’re doing and we have a tendency to forget what we have consumed anyway.

A new study from Sweden’s KTH Royal Institute of Technology has found that too much social media exposure actually reduces your ability to process information and depletes (耗尽) your short-term working memory.

Our working memory plays a critical role in our capacity to filter (过滤) information and remember what is valuable but it is not a limitless resource. Erik Fransen, a professor in Computer Science at KTH and the leader of this is new study on social media overload says this can explain why our capacity (容量) for processing information begins to fail when we attempt to put more information in the working memory.

In fact, when you try to process the information like speech or video, you are going to need partly the same system of working memory, so you are reducing your own working memory capacity. And when you try to store many things in your working memory, you get less good at processing information.

It is the periods of downtime of your brain—preferably disconnected from the distractions of your computer or smartphone—that are needed for memory consolidation (巩固) and transferring important information to your exposure to new information. Besides, you can empty your mind of thoughts quickly to relax completely, go for a short walk or spend a few minutes listening to music. This will help you improve your capacity to process information and increase your productivity.

1.What can we learn about social media overload from Paragraph 1?

A. It distracts our attention.　　 B. It is beneficial to us.

C. It brings us whatever we want.　　 D. It keeps us informed of everything.

2.Why does your capacity for processing information begin to fall sometimes?

A. Much of the information is unimportant.

B. Your working memory is a limited resource.

C. You're less good at processing information.

D. You don't make the most of your brain.

3.Which is recommended to relax your brain?

A. Thinking over things carefully.　　 B. Listening to music for a while.

C. Taking enough physical exercise.　　 D. Focusing more on the present.

高三英语阅读理解中等难度题查看答案及解析

About 70 scientists were working on a very busy project. All of them felt really desperate due to the pressure of work and the demands of their boss but everyone was loyal to him and did not think of quitting their job.

One day, one scientist came to his boss and told him, “Sir, I’ve promised to take my children to the exhibition going on in our township so I want to leave at 5:30 p. m.” His boss replied, “OK. You’re permitted to leave the office early today.”

The scientist started working. He continued his work after lunch. As usual, he got involved to such an extent that he looked at his watch only when he felt he was close to completion. The time was 8:30 p. m. Suddenly he remembered his promise to the children. He looked for his boss but he was not there. Having told him in the morning himself, he closed everything and left for home. Deep within himself, he was feeling guilty for having disappointed his children. He reached home. The children were not there. His wife alone was sitting in the hall and reading magazines. The situation was explosive; any talk would boomerang on him. His wife asked him, “Would you like to have coffee or shall I straight away serve dinner if you are hungry?” The man replied, “If you would like to have coffee, I too will have but what about the children?” His wife replied, “You don’t know? Your boss came here at 5:15 p. m. and has taken them to the exhibition.”

What had really happened was the boss who gave him permission was observing him working seriously at 5:00 p. m. He thought to himself: this person will not leave the work, but he’s promised to take his children to the exhibition. So he took the lead in taking them there. The boss does not have to do it every time. But once it’s done, loyalty is established.

That is why all the scientists at Thumba continued to work under their boss even though the stress was extraordinarily huge. By the way ,can you boldly guess who the boss was? He was none other that the mastermind behind India’s successful nuclear weapons program, Dr. APJ Abdul Kalam, former president of India.

1.The scientist asked for an early leave because________.

A．he felt increasingly desperate about his work

B．he meant to accompany his wife at dinner

the task at hand was close to completion

D．he’d promised to take his kids to a show

2.The underlined sentence implies that the scientist thought his wife was________.

A．dissatisfied with his coming home late

B．ready to serve dinner for him

grateful to his kind-hearted boss

D．delighted to see him back home

3.The boss took children to the exhibition________.

A．when it was too late for the scientist to do so

B．because the scientist was absorbed in his work

because he also wanted to see what was on show

D．when the man’s wife asked him to do so

4.All the scientists stayed loyal to their boss________.

A．out of gratefulness for his thoughtfulness

B．because he had power over them

to learn how to live under pressure

D．every time he took the children to the show

高三英语阅读理解中等难度题查看答案及解析

China is now sending more college students to study in the United States than any other country.  A new report shows a 23 percent increase in the number of Chinese students coming to the U.S.

The latest edition of the annual Institute of International Education（IIE）and another US institute found a 5 percent rise in the number of international university students in the US compared to one year ago. There are now over 157, 000 Chinese students at U.S. colleges and universities.

Aisa accounted for four of the top five countries and regions to take advantage of the US higher education system. “Increased numbers of students from China, particularly at the undergraduate level, largely accounts for the growth this past year,” the report stated. “They really enroll in a full range of US higher education,” said Peggy Blumenthal, senior counselor to the president of IIE, the group that made the report. “20 years ago, students from China only knew of a handful of US insitiutions, but now, they are enrolling in our community colleges, in our small liberal arts institutions, in the research universities. Really spread across the country,” she said.

Chinese mainland was in the number one spot, while India was the number two country of origin. South Korea was third and Canada was number four. China’s Taiwan held the number five spot. Saudi Arabia was in sixth with a 44-percent increase, while Japan was seventh, down 14 percent.

Blumenthal attributes the increase in the number of Chinese students heading to US colleges to limited university places in China, as well as a feeling from students and their parents than they want a “unique” educational experience. China’s family planning policy, says Blumenthal, has also meant that families can concentrated resources on a single child.

The University of California at Los Angeles has one of the largest Asian student populations of any college in the United States.

1.Which ranked the third place sharing US higher education?

A．Saudi Arabia        B．South Korea         C．Canada        D．India

2.Why is the number of Chinese students going to the US increasing?

A．The US colleges are better than those in China.

B．Each family in China has only one child.

C．China lacks enough educational resources.

D．Chinese students can enter varieties of US colleges.

3.Which of the following is right according to Peggy Blumenthal?

A．The number of Chinese students going to the US has increased by 23%.

B．The University of California has contributed to Asian education greatly.

C．Chinese student populations in the US mainly consist of undergraduates.

D．Chinese students know more about US higher education than before.

4.The best title for the passage can be________.

A．Chinese College Students Rush to US Schools

B．The Large Number of Chinese Students in the US

C．Chinese Students Make Up Largely Foreign Students in the US

D．Asian Middle School Students in the US Universities

高三英语阅读理解中等难度题查看答案及解析

Artificial flesh is growing ever closer to the real thing. Scientists in Australia have now created a new jelly-like material which they claim has the strength and lasting usage of actual skin, ligaments(韧带）,or even bone.

“With the special chemistry we’ve engineered in the hydrogel(水凝胶）,it can repair itself after it has been broken like human skin can,” explains chemist Luke Connal from the Australian National University. “Hydrogels are usually weak, but our material is so strong it could easily lift very heavy objects and can change its shape like human muscles do.”

Having a wet and soft material with such remarkable properties could be very important for the development of next-generation soft robotics and biomedical devices. Creating a shape-changing hydrogel that has multiple functions has proved an ongoing challenge for scientists, even with natural inspiration from sea creatures, such as jellyfish, sea cucumbers, and Venus fly traps.

While some hydrogels can withstand mechanical stress, others have self-healing properties, and a few more have the abilities to memorize shapes or change colours. As far as the ANU researchers know, no one else has been able to incorporate all these functions into one all-encompassing gel. At least, not at the speed and efficiency they’ve achieved.

Using this material, the researchers made extremely thin films of “flesh” without any breakage.

When these films were heated or cooled, they then changed into different shapes, bending one way or the other before returning back to their original state along with the temperature. If temperature is somehow used as a control, the authors think this gel could one day be moved like an artificial muscle. Researchers are trying to modify their temperature control technology accordingly and make a significant step towards turning this hydrogel into practical use.

1.What do you know about the new material according to the text?

A.It looks like the jelly and functions like the robot.

B.It can be easily repaired by scientists after being broken.

C.It is likely to be the most multifunctional hydrogel at present.

D.It can hardly go back to its original shape after heated or cooled.

2.What is the author’s attitude towards the future of the dynamic hydrogel?

A.Indifferent.

B.Neutral.

C.Negative.

D.Positive.

3.What is the best title for the text?

A.Getting scientific inspiration from nature.

B.Lifting heavy objects by dynamic hydrogels.

C.Creating a new kind of flesh with chemistry.

D.Enabling artificial robots to heal themselves.

4.What will the author most probably talk about in the following paragraph?

A.The characters of artificial flesh.

B.The creation of the dynamic hydrogel.

C.The shapes and colors of artificial flesh.

D.The application of the dynamic hydrogel.

高三英语阅读理解中等难度题查看答案及解析

Josh Katz works at the New York Times. His common job is to use information to tell interesting stories. In December 2013, Katz built a quiz on the Times website. It asked people about the words they used to describe things and events. It also asked how they pronounced common words. The quiz then used people’s answers to decide where in the United States they were from.

The quiz got more than 350, 000 results. Katz turned the results into a book. In Speaking American, he studies regional differences in how Americans talk.

“A lot of people’s language shows who they are and where they are from, in a very personal way”, Katz said.

Katz says people are often surprised to learn that the way they talk can show where they grew up. Most Americans don’t realize they use regionalisms --- or words and phrases specific to a particular part of the country. But just about everyone does. Almost every major U.S. city has a few unique terms. For example, in Philadelphia, Pennsylvania, the night before Halloween is known as Mischief Night. Anyone who calls it that is likely to be connected to the city.

Katz himself was surprised by how many common words are regional. “There are a lot of words I use that I just thought were standard words,” he says. “Then I found out some of these words were actually a product of my upbringing.”

For example, he says, “I thought everyone said ‘sneakers’ (运动鞋) and not ‘tennis shoes’.”　 But it turns out “sneakers” is connected mostly to the Northeast. That’s where Katz is from.

Some scholars think that language in the U.S. is growing more homogeneous (同类的). But Katz disagrees. “These regional differences are here to stay.” he says.

Not only are people still using common regionalisms, but there are new ones appearing all the time, according to Katz. There’s no way to predict how language will change in the future. But Katz sees more changes coming. “The only sure thing about language is that it’s going to keep moving.” he says.

1.What’ s the purpose of the quiz?

A.To test people on common knowledge.

B.To find out what words are mostly used.

C.To help people learn about their hometown better.

D.To see whether people’s language shows their backgrounds.

2.How do most Americans look at their using regionalisms?

A.They are proud of it.

B.They do it unintentionally.

C.They find it quite interesting.

D.They have no idea why everybody does it.

3.Why does Katz mention “ sneakers” in the 6th paragraph?

A.Because it’s different from “tennis shoes”.

B.Because it’s an example of a standard word.

C.Because his hometown is possibly the birthplace of it.

D.Because many common words come from a specific area.

4.What is Katz’s opinion on regional differences?

A.They will finally disappear in the future.

B.They have a bad influence on people’s life.

C.They will remain a part of people’s everyday life.

D.They prevent language from being homogeneous.

高三英语阅读理解中等难度题查看答案及解析

As a result of __ is now known in physics and chemistry, scientists have been able to make important discoveries in biology and medicine.

A. it     B. what     C. which     D. that

高三英语单项填空中等难度题查看答案及解析

Now _____ understanding of climate change is no longer limited to ____ small group of scientists or environmentalists.

A. / ; a            B. an ; a              C. the ; the            D. a ; /

高三英语单项填空中等难度题查看答案及解析