For more than twenty years scientists have be...

For more than twenty years scientists have been searching for signs of life on other planets. Most of these searches have been done over the radio. The hope is that someone in outer space may be trying to get in touch with us. Scientists also have sent radio and television messages on spaceships traveling through space, on the chance that someone may be receptive （善于接受的） to such messages.

Scientists are using powerful radio telescope to listen to signals from about 1,000 stars, all within 100 light years of earth. In addition, they will scan (扫视) the entire sky to “listen” for radio messages from more distant stars. Using a computer, they will be able to monitor more than eight channels at one time. Scientists are looking for any signal that stands out from the background noise.

Of the 200 billion stars in the Milky Way galaxy （银河星系）, scientists find that five percent are like our sun. Perhaps half of them have a planet like earth. Such a planet would be a reasonable distance from the star for temperatures to be right for the evolution of life. Based on the inhabitable (that can be lived in) planets in our galaxy, most scientists agree that chances are likely that one or more of these planets support some life.

However, many scientists wonder whether intelligent （有智力的） life exists on other planets. Some believe that twenty years of searching without any intelligible （可理解的） messages shows that no one is out there. They say that the evolution of intelligence comparable to ours is unlikely.

Other scientists believe that our search hasn’t been long enough to rule out the possibility that intelligent life exists in our galaxy. Although our sun family in only about five billion years old,　 our galaxy is about 20 billions years old. In that time, some scientists think it is likely that civilizations are much more advanced than ours. Perhaps these civilizations send us no signals; perhaps we have not recognized the signals they have sent us. If we hope to find intelligent life, these scientists believe that we have to keep looking.

1.According to the passage, how many planets in our galaxy might human beings live?

A. 5 billion　　 B. 10 billion　　 C. 15 billion　　 D. 200 billion

2.The first paragraph in this passage is mainly about ______.

A. where scientists are looking for signs of life on other planets

B. why scientists are looking for signs of life on other planets

C. how scientists are looking for signs of life on other planets

D. when scientists are looking for signs of life on other planets

3. The underlined word “monitor” in the passage means “______”.

A. find　　 B. follow　　 C. study　　 D. form

4. Which of the statements is TRUE based on the information in the passage?

A. The earth is one of the oldest planets in our galaxy.

B. Most scientists believe that there is intelligent life on other planet.

C. Scientists don’t believe that there might be life on other planets.

D. Scientists are trying different ways to find signs of life on other planet.

高二英语阅读理解中等难度题查看答案及解析

For more than twenty years scientists have been searching for signs of life on other planets. Most of these searches have been done over the radio. The hope is that someone in outer space may be trying to get in touch with us. Scientists also have sent radio and television messages on spaceships travelling through space, on the chance that someone may be receptive to such message.

　Scientists are using powerful radio telescopes to listen to signals from about 1,000 stars, all within 100 light years of Earth. In addition, they will scan the entire sky to "listen" for radio messages from more distant stars. Using a computer, they will be able to monitor more than eight channels at one time. Scientists are looking for any signal that stands out from the background noise.

　Of the 200 billion stars in the Milky Way galaxy, scientists find that five percent are like our sun. Perhaps half of them have a planet like Earth. Such a planet would be a reasonable distance from the star for temperatures to be right for the evolution (进化) of life. Based on the inhabitable (可居住的) planets in our galaxy, most scientists agree that chances are likely that one or more of these planets support some life.

　However, many scientists wonder whether intelligent life exists on other planets. Some believe that twenty years of searching without any intelligible messages shows that no one is out there. They say that the evolution of intelligence comparable to ours is unlikely.

Other scientists believe that our search hasn’t been long enough to rule out the possibility that intelligent life exists in our galaxy. Although our sun family is only about five billion years old, our galaxy is about 20 billion years old. In that time, some scientists think it is likely that civilization much more advanced than ours have developed. Perhaps these civilizations send us no signals; perhaps we have not recognized the signals they have sent us. If we hope to find intelligent life, these scientists believe that we have to keep looking.

1.According to the passage, how many planets in our galaxy might be inhabitable?

A. 5 billion         B. 10 billion           C. 15 billion           D. 200 billion

2.The first paragraph in this passage is mainly about __________.

A. how scientists are looking for signs of life on other planets

B. why scientists are looking for signs of life on other planets

C. where scientists are looking for signs of life on other planets

D. When scientists are looking for signs of life on other planets

3.The underlined word “monitor” in Paragraph two means “__________”.

A. find              B. follow            C. check           D. form

4.Which of the following is TRUE based on the information in the passage?

A. The earth is the oldest planet in our galaxy.

B. All scientists believe that there is intelligent life on other planets.

C. Scientists are trying different ways to find signs of life on other planets.

D. Scientists will give up the search for signs of life on other planets.

高二英语阅读理解中等难度题查看答案及解析

For more than twenty years scientists have been seeking to understand the mystery of the “sixth sense” of direction. By trying out ideas and solving problems one by one, they are now getting closer to one answer. One funny idea from observing animals in nature is that animals might have a built-in compass.

Many birds migrate(迁徙）twice a year between their summer homes and winter homes. Some of them fly for thousands of kilometers and mostly at night. Experiments have shown that some birds can recognize star patterns. But they can keep on course even under cloudy skies. How can they do that? A common bird that does not migrate but is great at finding its way home is the horning pigeon(鹤子）and they have been widely studied. One interesting experiment was to attach little magnets (磁铁，磁场）to the birds’ heads to block their magnetic sense — just as a loud radio can keep you from hearing a call to dinner. On sunny days, that did not fool the pigeons. Evidently they can use the　 sun to tell which way they are going. But on cloudy days, the pigeons with magnets could not find their way. It was as if the magnets had blocked their magnetic sense. Similar experiments with the same kind of results were done with honeybees.

In spite of the experiments, the idea of an animal compass seemed pretty extraordinary. How would animals get the magnetic stuff for a compass? An answer came from an unexpected source, A scientist was studying bacteria that lived in the mud of ponds. He found　 accidentally little rod-like bacteria that all swam together in one direction 一 north. In fact, the bacteria had made themselves into little magnets that could line up with the earth’s magnet.

The big news was that a living thing, even a simple bacterium，can make magnetite. That led to a search to see whether animals might have it. By using a special instrument, scientists were able to find magnetite in bees and birds，and even in fish. In each animal, except for the bee, the magnetic stuff was always in or close to the brain.

Thus, the idea of a built-in animal compass began to seem reasonable.

1.The main purpose of this passage is to 　　　　　 .

A. explain how the animal compass was invented

B. answer how an animal would get the magnetic stuff for a compass

C .introduce a famous experiment

D. prove the idea that animals might have a built-in compass

2.Which of the following can we infer from Paragraph 3?

A. The bacteria magnetic sense seemed to be the same as the earth’s.

B. The earth itself is a big magnet with which something magnetic might lines up

C. Little rod-like bacteria were found to swim north together through experiments.

D. Migrant birds can easily lose their way because of lacking magnetie.

3.The underlined words “keep on course” in the second paragraph means“

A.stay in the correct flying route

B.lose one’s way

C.remain calm

D.recognize star patterns

4.Where is probably the built-in magnet for a fish according to the scientists?

A.Close to its stomach. B.In its heart.

C.Far from its brain. 　 D.Inside its head.

高二英语听力第三部分中等难度题查看答案及解析

I have been writing for more than 50 years.I still consider myself 　　 to it, because I have written only one book. 　　 , I have written thousands of letters, more than a hundred e-books and 　　 millions of words on the Internet for hundreds of websites.

Though I don’t like foreign languages, I have also been 　　 and have learned seven of them. I was 　　 to study French, German and Latin for six years at school and Russian for four years at university, yet none of these was as 　　 as writing a book of excellent 　　 . And I am only talking about 　　 here, not plot, although that is obviously 　　 too.

Rules change in languages. The strict rules of the 19th century were largely 　 　　 over the following 100 years. However, some rules 　　 and that is how it should be too. Rules in writing are very important. And writing is a 　　 thing and it involves languages, plots, reader’s preferences, etc. So, who should 　　 writing and book competitions? And what rules should they 　 　　 　 ? Readers buy more books than writers and language experts put together. And writers write for readers, some of 　 might be other writers or teachers. Similarly there has to be a storyline or plot that is of 　　 , but who should be the judge of that?

There is an author, John Locke, who sold a million books in five months, yet he was 　　 for his style and content by experts, 　　 surely he must have been doing something 　　 . Currently, most writing competitions are judged by writers and this seems 　　 to me. I suggest that if there are five judges, three should be readers, one should be a writer and one should be an English teacher.

1.A. clear　　　　 B. familiar　　　　 C. successful　　 D. new

2.A. Thus　　　 B. Otherwise　　 C. However　　　 D. Therefore

3.A. learned　　　　　　　　 　　 B. left　　　　 C. met　　　　 D. formed

4.A. directed 　　　　　　　　　 B. guided C. taught　 D. given

5.A. forced　　 B. reminded　　 C. invited　　 D. begged

6.A. quick　　　　　　　　 　　 B. helpful　　　　 C. simple　　 D. hard

7.A. quality　　 B. price　 C. service　 D. meaning

8.A. duty　　　　 B. language　　　 C. writers　　　　 D. reasons

9.A. difficult　　　　　　　 　　 B. impossible　　 C. important　　 D. meaningless

10.A. put away　　　　　　 　　 B. found out　　　 C. carried out　　 D. broken down

11.A. work　　　　　　　　 　 B. remain　　　 C. return　　　　 D. appear

12.A. challenging　　　　 　　 B. useless　　　　 C. hopeful　　　 D. boring

13.A. choose　　　　　　　 　　 B. operate　　　　 C. judge　　　　 D. organize

14.A. cover　　 B. follow　　　　 C. notice　　　　 D. support

15.A. that　　　 B. them　　　 C. whom　　 D. these

16.A. interest　　　　　　　 　　 B. thought　　　　 C. benefit　　　 D. problem

17.A. forgotten　　　　　　 　　 B. thanked　　 C. criticized　　 D. praised

18.A. if　　　　 B. but　　　 C. so　　　　 D. although

19.A. perfect　　　 B. wrong　　　　 C. impolite　　 D. right

20.A. confusing　　 B. normal　　　　 C. useful　　 D. early

高二英语完形填空简单题查看答案及解析

Cecile and I have been friends since college, for more than thirty years. Our friendship has 　　　 constant. We have seen each other through all the times when we really need a friend. In 　　　 of our friendship, Cecile and I took our first 　　　 trip together.

The first day of our trip ended in Santa Fe, New Mexico.

from the long drive, we decided to go to the restaurant for dinner. We sat down and　　 　 our meal. As we talked, I noticed a(n) 　　　 couple sitting a short distance away from us. The look of 　　 on the woman’s face attracted me. She stared into the face of the man as he talked,　 　　 me of a teenager in love!

I called Cecile’s 　　 to the couple. As we watched, the man reached 　　　 to place a gentle kiss on the woman’s cheek. She　　　 . “Now that’s what I call real love! I imagine they’ve been married for a long time.” I said. “　　 maybe,” remarked Cecile, “they haven’t been together long.” “Well, whatever the case, it’s 　　　 they care much for each other,” I said.

Cecile and I watched and listened 　　 to their conversation. She smiled and 　　　 whatever he said.　 We were touched by the warm scene we were witnessing. Then the 　　　 changed. The woman’s wrinkled but beautiful face was suddenly covered with a 　　　 look. She asked the man in a sweet voice, “Do I know you? What is this place?” “You know me. I’m Ralph, your husband. We’re in Santa Fe,” the man said. “Oh, I 　　　 to have forgotten. I’m not sure,” she said.

“That’s okay, sweetheart. You’ll be all right,” he 　　　 her, kissing her cheek again. Tears coursed down our cheeks as Cecile and I looked at each other. “We were right,” she said 　　 . “It is the real thing. That is love.”

1.A. become　 B. remained　　　　 C. grown　　　　 D. developed

2.A. celebration　 B. terms　　　　　　 C. favor　　　　 D. congratulation

3.A. air　　　　　　　 B. boat　　　　　　 C. road　　　　　　 D. bicycle

4.A. Bored　　　　 B. Suffered　　　 C. Excited　　 D. Tired

5.A. ordered　　　 B. cooked　　　 C. prepared　　 D. finished

6.A. young　　　　　　 B. friendly　　　 C. elderly　　　 D. rich

7.A. adoration（爱慕）　 B. doubt　　　 C. hope　　 D. envy

8.A. showing　　　 B. telling　　　　　　 C. reminding　　 D. introducing

9.A. idea　　　　　　 B. intention　　　 C. time　　　　 D. attention

10.A. away　　　　　　 B. over　　　　　　 C. around　　　　 D. off

11.A. smiled　　　　　　 B. disagreed　　　 C. angered　　 D. moved

12.A. Though　　　 B. Or　　　　　　 C. Therefore　　 D. Otherwise

13.A. natural　　　　　　 B. important　　　 C. obvious　　 D. moving

14.A. madly　　　　　　 B. shamefully　　　 C. casually　　 D. unashamedly

15.A. picked up　　　 B. agreed with　 C. stuck to　　 D. questioned on

16.A. scene　　　　　　 B. place　　　　　　 C. topic　　　　 D. sense

17.A. frightened　　 B. confused　　　　 C. disappointing D. puzzling

18.A. seem　　　　　　 B. feel　　　　　　 C. use　　　　 D. need

19.A. answered　　 B. comforted　　　　 C. told　　　　 D. encouraged

20.A. quickly　　　　 B. eagerly　　　 C. thoughtfully　 D. cheerfully

高二英语完形填空中等难度题查看答案及解析

David, _____ I have been sharing a dorm for more than two years, is quite a funny guy.

A. of whom    B. with whom    C. in whom　　     D. from whom

高二英语单项填空中等难度题查看答案及解析

．—________ have you been a reporter?

—For more than three years．

A．How long     B．How many      C．How soon     D．How often

高二英语单项填空简单题查看答案及解析

It has been more than twenty years since pioneering British computer programmer, Sir Tim Berners Lee, created the World Wide Web. But could he have ever imagined how much the web would change our lives? And would he approve of how some British students are taking advantage of his invention?

Universities and exam boards around the UK are becoming increasingly concerned with the rising number of cases of plagiarism, many of which are facilitated (助长) by the Internet access.

In the UK most school and university students complete coursework throughout the academic year which contributes toward their final mark. In many cases coursework makes up the main part of the qualification. Since coursework is completed in the students’ own time it cannot be monitored by teachers in the same way as an exam.

Derec Stockley, director of examinations in the UK, explains, “Plagiarism affects coursework more than anything else, and in the cases that come to our attention, more and more are linked to the Internet.”

At a university level recent reports suggest that plagiarism has evolved from separate cases of individual cheating to systematic and even commercial operation. Students can now pay for bespoke essays to be written for them by experts.

It is estimated that the market in online plagiarism is now worth 200 million pounds a year. Every month more and more websites offering to write student’s essays for them appear on the Internet.

Barclay Littlewood, owner of Degree Essays UK employs 3,500 specialist writers and charges between 120 pounds and 4,000 pounds per essay. However, Mr. Littlewood refutes the accusation that he is helping students to cheat.

1.What dose the underlined word “plagiarism” in Paragraph 2 mean in the passage?

2.Which of the following statements is mentioned by the author?

3.It can be inferred from the text that the author seems to _____.

4.The paragraph following the passage will most probably be about_____.

高二英语阅读理解困难题查看答案及解析

Since the 1970s, scientists have been searching for ways to connect the brain with computers. Brain-computer Interface (BCI) technology could help people with disabilities send commands to machines.

Recently, two scientists, Jose Millan and Michele Tavella from the Federal Polytehnic School in Lausanne, Switzerland, showed a small robotic wheelchair directed by a person’s thoughts. In the laboratory, Tavella operated the wheelchair just by thinking about moving his left or right hand. He could even talk as he watched the vehicle and guided it with his thoughts.

“Our brain has billions of body cells(细胞). These send signals through the spinal cord(脊髓) to the body part to give us the ability to move. But spinal cord injuries or other conditions can prevent these weak electrical signals from reaching the body part.” Tavella says. “Our system allows disabled people to communicate with outer world and also to control machines.”

The scientists designed a special cap for the user. This head cover picks up the signals from the scalp(头皮) and sends them to a computer. The computer finds meanings of the signals and commands the wheelchair with an engine. The wheelchair also has two cameras that tell objects in its path. They help the computer react to commands from the brain.

Prof. Millan, the team leader, says “Scientists keep improving the computer software that finds meanings of brain signals and turns them into simple commands. The practical possibilities that BCI technology offers to disabled people can be grouped in two kinds: communication, and controlling objects. One example is this wheelchair.

He says his team has set two goals. One is testing with real patients, so as to prove that this is a technology they can get advantages from. And the other is to ensure that they can use the technology over a long period of time.

1.BCI is a technology that can _______.

A. help to update computer systems　　 B. control a person’s thoughts

C. help the disabled to recover　　 D. connect the human brain with computers

2.How did Tavella operate the wheelchair in the laboratory?

A. By controlling his muscles.　　 B. By using his mind.

C. By moving his hand.　　 D. By talking to the machine.

3.Which of the following shows the path of the signals described in Paragraph 4?

A. scalp→cap→computer→wheelchair　　 B. computer→cap→scalp→wheelchair

C. scalp→computer→cap→wheelchair　　 D. cap→computer→scalp→wheelchair

4.The team will test with real patients to_______.

A. make money from them　　 B. prove the technology useful to them

C. make them live longer　　 D. learn about their physical condition

5.Which of the following statements is FALSE?

A. Scientists have been looking for ways to link the brain with computers.

B. The wheelchair designed by Millan and Tavella is directed by a person’s thoughts.

C. Spinal cord injuries can prevent these weak electrical signals from reaching the body part.

D. The wheelchair has been put in use and benefited real patients.

高二英语阅读理解困难题查看答案及解析

Since the 1970s, scientists have been searching for ways to link the brain with computers. Brain-computer interface (界面) (BCI) technology could help people with disabilities send commands to machines.

Recently, two researchers, Jose Milan and Michele Tavella from the Federal Polytechnic School in Lausanne, Switzerland, demonstrated（展示）a small robotic wheelchair directed by a person's thoughts.

In the laboratory, Tavella operated the wheelchair just by thinking about moving his left or right hand. He could even talk as he watched the vehicle and guided it with his thoughts.

“Our brain has billions of nerve cells. These send signals through the spinal cord (脊髓) to the muscles to give us the ability to move. But spinal cord injuries or other conditions can prevent these weak electrical signals from reaching the muscles,” Tavella says.　 “Our system allows disabled people to communicate with external world and also to control devices.”

The researchers designed a special cap for the user. This head cover picks up the signals from the scalp(头皮) and sends them to a computer. The computer interprets the signals and commands the motorized wheelchair. The wheelchair also has two cameras that identify objects in its path. They help the computer react to commands from the brain.

Prof. Milan, the team leader, says scientists keep improving the computer software that interprets brain signals and turns them into simple commands. “The practical possibilities that BCI technology offers to disabled people can be grouped in two categories: communication, and controlling devices. One example is this wheelchair.”

He says his team has set two goals. One is testing with real patients, so as to prove that this is a technology they can benefit from. And the other is to guarantee that they can use the technology over long periods of time.

1. BCI is a technology that can _________________.

A. help to update computer systems

B. link the human brain with computers

C. help the disabled to recover

D. control a person's thoughts

2.How did Tavella operate the wheelchair in the laboratory?

A. By controlling his muscles.

B. By talking to the machine.

C. By moving his hand.

D. By using his mind.

3.Which of the following shows the path of the signals described in Paragraph 5?

A. scalp→computer→cap→wheelchair

B. computer→cap→scalp→wheelchair

C. scalp→cap→computer→wheelchair

D. cap→computer→scalp→wheelchair

4. Which of the following would be the best title for the text?

A. BCI Could Mean More Freedom for the Disabled

B. New Findings about How the Human Brain Works

C. Switzerland, the BCI Research Center

D. Robotic Vehicles Could Help to Cure Brain Injuries

高二英语阅读理解中等难度题查看答案及解析