精英家教网 > 高中英语 > 题目详情

                                                               Planet Hunter

    When Geoff Marcy was 14, his parents bought him a telescope. Every night, he would go onto the roof outside his window to see the wonders of the sky.

    “What excited me most was whether there were planets(行星)in other solar(太阳的)systems where life might exist, ”he says. “I decided to try to find planets orbiting(沿…轨道运行)other stars like our Sun.”

    And he did. “My fellow researcher, Paul Butler, and I found our first planet in 1995, ”Dr. Marcy says. “We worked for ten years without finding anything! But we stuck with it, and our patience paid off. ”

    Since then, the two scientists have discovered 65 of the more than 100 planets found orbiting other stars. Dr. Marcy and Dr. Butler also spotted the first “family”of three planets. In June 2002 they announced another discovery: a Jupiter-like(像木星一样的)planet orbiting star 55 Cancri.

    At first, the two researchers found only planets that orbit close to stars. Recently, the scientists found planets farther out. The planet orbiting 55 Cancri is a major breakthrough: it is the first sighting of a large gas planet about the same distance from the star as Jupiter is from the Sun.

    Why is this important? Scientists think that life on Earth may exist because of two special features(特征)in our solar system. The first is Jupiter.

    “Because it’s so big, Jupiter pulls comets and asteroids(小行星), or they all come and hit the Earth. ”Dr. Marcy explains. “Without Jupiter, life on Earth would likely have been destroyed. ”

    A second feature is that Earth is a rocky planet where liquid water, which is necessary for life, can exist. Unlike gas planets, rocky planets like Earth have surfaces where water can gather in pools and seas, which may support life. A huge space exists between the Jupiter-like planet and two other planets that lie close to 55 Cancri. Is there an Earth-like planet in the space, too small for us to notice? If so, says Dr. Marcy, “We would have two striking similarities to our solar system: a Jupiter-like planet and an Earth-like planet. And there may be life! ”

59. What can we learn about Dr. Marcy from the passage?

   A. He is fond of watching Jupiter.

   B. He is from a scientist family.

   C. He dislikes working with Paul Butler.

   D. He is interested in finding life in outer space.

60. Which of the following is true of the recent discovery?

   A. The planet is not as protective as Jupiter.

   B. The planet is close to star 55 Cancri.

   C. The planet proves to be a gas planet.

   D. The planet is as large as Jupiter.

61. How many planets orbiting other stars have the two scientists discovered so far?

   A. 100                 B. 69                    C. 66                        D. 65

62. Dr. Marcy thinks that life may exist in the 55 Cancri system because ______.

   A. he has found the system similar to the solar system

   B. he has discovered an Earth-like planet there

   C. he has discovered a rocky planet there

   D. he has found signs of life in the system

63.“But we stuck with it”(in Paragraph 3)means ______.

   A. they felt discouraged

   B. they carried on with it

   C. they failed in their attempt

D. they made some progress

【小题1】D

【小题2】C

【小题3】D

【小题4】A

【小题5】B

练习册系列答案
相关习题

科目:高中英语 来源: 题型:

If Newton lived today, he would be surprise by what ____ in science and technology.

A. had discovered                              B. had been discovered

C. has discovered                               D. has been discovered

查看答案和解析>>

科目:高中英语 来源: 题型:阅读理解

阅读下面短文,掌握其大意,然后从短文后所给各题的四个选项(A、B、C和D)中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。

On the night of the play, Jack was at the theatre early and he was already dressed in a policeman’s clothes long before the end of the first scene. He certainly looked the part all right, he thought as he    37    himself in the mirror. He even thought of going out into the street to see    38    he could pass as a policeman out there. Just for fun, of course.

Then he suddenly felt nervous. After all, it was his first time to    39    a part in a play. How could he face all those people   40    the play? He put his head in his hand and tried to    41   his lines, but nothing came to his mind.

A knock on the door made him look    42   . He was to go on stage in the second scene. “Have I   43   my part and ruined the play for everybody?” he

thought to himself, but it was only the manager. She    44    how nervous he was and suggested he should stand near the stage    45    he could watch and follow the play. It was a good   46    of getting rid of his nervousness, she said. She was right--- it seemed to    47   . In fact, the more he watched the play, the    48   he felt himself part of it.

At last the    49   came for him to appear on the stage, but suddenly the manager came to him again, looking worried as she placed a hand on his arm to    50    him back. “Has anything gone wrong?” Jack asked. “I’m afraid you’re going to be    51   ,” she said. “They have jumped three pages of the play and have missed your part out completely.”

A. looked           B. showed          C. admired         D. enjoyed

A. how             B. whether          C. why            D. as if

A. make            B. join              C. have           D. give

A. following        B. hearing           C. watching        D. noting

A. read            B. remember         C. understand       D. learn

A. away            B. up               C. out             D. down

A. passed           B. left              C. missed          D. failed

A. wondered        B. imagined         C. noticed           D. examined

A. where           B. when            C. that              D. there

A. idea           B. way             C. path              D. plan

A. do             B. win             C. work             D. act

A. less            B. harder           C. better             D. more

A. hour           B. minute           C. moment           D. period

A. hold           B. take             C. catch              D. push

A. frightened      B. excited           C. disappointed        D. pleased

查看答案和解析>>

科目:高中英语 来源: 题型:阅读理解

Chemicals used for industrial processes often create dangerous forms of waste. The amount of these chemicals has risen heavily in the past few years, as more areas of the world industrialize and new products are produced. Over 80,000 different chemicals are used in industries world wide. Around the world hundreds of millions of tons of harmful waste are produced each year. Often, it is difficult and expensive to get rid of these chemicals or to store them in a way that does not endanger human life and the environment.

Every year, major health problems result from harmful waste. Sadly, it is often when someone has died or, become seriously ill that governments will take action and reduce levels of dumped harmful waste. In 1989, a school in New Jersey had to be closed because students there had suffered too much exposure to chromium. It was later learned that large amounts of chromium had been dumped nearby and blown over to the school area.

Research has been done to provide information on the effects of every chemical. Because waste chemicals often mix together, it will also be necessary to learn how the combinations of these chemicals affect human health.

Some governments have realized how serious the problem is and are making laws to get rid of harmful waste. They are also trying to limit the amount of waste industries are allowed to produce.

 Not only governments but the public as well must form part of the solution. They can choose not to buy those products which require the production of harmful waste, attempt to affect policymakers, and produce less harmful waste themselves. Many scientists think that waste production can be cut. The waste can be reduced by at least one-third using existing technologies and methods.

57.What is mainly discussed in the text?

A The effect of every chemical.          

B.Problems of harmful waste.

C.Chemicals used for industrial processes.

D.Events related to waste chemicals.

58.From the text we know that ______.

      A.chromium can poison people when there is a wind

      B.chromium pollution makes the local government close the school

C.Some governments don’t realize how serious the problems are until people suffer a lot from harmful waste

D.about two-thirds of the waste can pollute the environment

59.Which of the following least matches the solution the writer refers to?

   A.Chemicals used for industrial processes should be banned.

   B.People can make use of the existing technologies and methods to reduce the waste

   C.Policymakers make laws to limit the production of harmful waste.

   D.People choose not to buy products which may produce harmful waste.

60.The writer of the text thinks that ______.

   A.governments should have forbidden the production of waste chemicals

   B.mixed waste chemicals can always be stored without endangering people

   C.industries must not produce waste chemicals which harm people so much

   D.everyone can do something to help solve the problem of waste chemicals

查看答案和解析>>

科目:高中英语 来源: 题型:阅读理解

Ⅲ  阅读(共两节,满分40分)

第一节  阅读理解(共15小题;每小题2分,满分30分)

阅读下列短文,从每题所给的A、B、C和D项中,选出最佳选项,并在答题卡上将该项涂黑。

Can you believe your eyes? A recent experiment suggests that the answer to that question may depend on your age.

Martin Doherty, a psychologist at the University of Stirling in Scotland, led the team of scientists. In this experiment, Doherty and his team tested the perception(观察力) of some people, using pictures of some orange circles. The researchers showed the same pictures to two groups of people. The first group included 151 children aged 4 to 10, and the second group included 24 adults aged 18 to 25.

The first group of pictures showed two circles alone on a white background. One of the circles was larger than the other, and these people were asked to identify the larger one. Four-year-olds identified the correct circle 79 percent of the time. Adults identified the correct circle 95 percent of the time.

Next, both groups were shown a picture where the orange circles, again of different sizes, were surrounded by gray circles. Here’s where the trick lies in. In some of the pictures, the smaller orange circle was surrounded by even smaller gray circles — making the orange circle appear larger than the other orange circle, which was the real larger one. And the larger orange circle was surrounded by even bigger gray circles — so it appeared to be smaller than the real smaller orange circle.

When young children aged 4 to 6 looked at these tricky pictures, they weren’t fooled — they were still able to find the bigger circle with roughly the same accuracy as before. Older children and adults, on the other hand, did not do as well. Older children often identified the smaller circle as the larger one, and adults got it wrong most of the time.

As children get older, Doherty said, their brains may develop the ability to identify visual context. In other words, they will begin to process the whole picture at once: the tricky gray circles, as well as the orange circle in the middle. As a result, they’re more likely to fall for this kind of visual trick.

41.Doherty and his team of scientists did an experiment to evaluate        .

A.children’s and adults’ eye-sight

B.people’s ability to see accurately

C.children’s and adults’ brains

D.the influence of people’s age

42.When asked to find the larger circle,        .

A.children at 6 got it wrong 79 % of the time with no gray ones around

B.only adults over 18 got it right 95% of the time with gray ones around

C.children at 4 got it right about 79 % of the time with gray ones around

D.adults got it right most of the time with gray ones around

43.According to the passage, we can know that        .

A.a smaller orange circle appears bigger on a white background

B.an orange circle appears bigger than a gray one of the same size

C.a circle surrounded by other circles looks bigger than its real size

D.a circle surrounded by bigger ones looks smaller than its real size

44.Visual context may work when children get older than        .

A.4                           B.6                            C.10                          D.18

45.Why are younger children not fooled?

A.Because they are smarter than older children and adults.

B.Because older people are influenced by their experience.

C.Because people’s eyes become weaker as they grow older.

D.Because their brain can hardly notice related things together.

查看答案和解析>>

科目:高中英语 来源: 题型:

 ---Have you brought the book I lent to you yesterday?

   ---Sorry, I put it on my bookshelf and _________ all about it

         A. had forgotten  B. forget                    C. forgot        D. will forget

查看答案和解析>>

科目:高中英语 来源: 题型:

 When lost in work , ______ he often was , he would forget all about eating and sleeping.

A. what             B. as                  C. just like              D. so

查看答案和解析>>

科目:高中英语 来源: 题型:

We will do everything we can _____ out city and people.

A. to save      B. save      C. save to        D. saving

查看答案和解析>>

科目:高中英语 来源: 题型:

If we don’t start now, we must risk      the train.

A. being missed     B. missing          C. to miss        D. miss

查看答案和解析>>

同步练习册答案