题目内容

Since people first sent rockets into space in the 1950s, we have been leaving behind all sorts of things. Some of them, like the camera, were lost by astronauts while they did work outside their spaceship. But much of the space junk is made up of little pieces of things that were once bigger objects, until they struck each other and broke apart.
Some things we send into space fall back toward the earth and burn up in the atmosphere. But larger pieces sometimes survive the extreme heat and hit the ground or the ocean at great speeds. So there is always concern that something may fall from the sky and do some harm.
But space junk falling on housetops (屋顶) is not the biggest worry. Scientists are concerned about what happens when an empty rocket strikes another while orbiting (绕轨道飞行) the earth. Two big things become many smaller things. They then hit other things. The pieces get smaller and smaller until they form a cloud of junk that blocks the path of future space vehicles.
So what can be done to clean up the space around our planet? Marco Castronuovo, an Italian researcher, talks about sending a satellite into space that would get very close to some of the larger pieces of space junk. The satellite would connect a small rocket to the useless object. When the rocket explodes, it pushes the junk into a lower and slower orbit, nearer the earth. After a time, the junk burns up in the atmosphere.
Mr. Castronuovo has proposed (提议) using a number of small satellites with robotic arms. One arm would catch the space junk, and another arm would connect the rocket. He imagines that each satellite would jump from one large piece of junk to another. He thinks this method could destroy about ten large objects each year.
Scientists have been concerned about space junk for many years. Right now, the costs of the clean-up have been too great. Mr. Castronuovo says his system could be put in place for a much more reasonable amount of money.
【小题1】Much of the space junk _____.

A.was thrown by the astronauts
B.is from broken spaceship
C.is made up of small pieces of things
D.returns to the earth piece by piece
【小题2】Scientists are most worried that the space junk _____.
A.will stop the future space vehicles
B.will do harm to the atmosphere
C.will fall on the housetops
D.will burn up in space
【小题3】What does Marco Castronuovo think of his system?
A.It can remove space junk completely.
B.It can save a large amount of money.
C.It can create a large amount of space.
D.It can develop robotic technology.


【小题1】C
【小题2】A
【小题3】B

解析试题分析:文章介绍太空垃圾的形成原因和对太空造成的危害,及如何解决此类问题。
【小题1】细节题:从第一段的句子:But much of the space junk is made up of little pieces of things that were once bigger objects, until they struck each other and broke apart.可知大多数的太空垃圾是由小的东西组成的,选C
【小题2】细节题:从第三段的句子:The pieces get smaller and smaller until they form a cloud of junk that blocks the path of future space vehicles.可知 科学家担心太空垃圾会阻挡太空飞行器的路,选A
【小题3】推理题:从最后一段的句子:Mr. Castronuovo says his system could be put in place for a much more reasonable amount of money.可知Mr. Castronuovo认为他的系统会节约很多钱,答案是 B
考点:考查科普类短文
点评:文章介绍太空垃圾的形成原因和对太空造成的危害,及如何解决此类问题。文章难度适中,但题目要我们理解有些重点的句子。集中考查了句意理解题和细节题,要求考生有较强的细节理解能力。做题时也可以结合自己的生活常识和经验,再通过逻辑推理和判断。

练习册系列答案
相关题目

填空(共10小题:每小题1分,满分10分)

阅读下面短文,根据所读内容在文后第76至第85小题的空格里填上适当的单词或短语,并将答案转写到答题卡上。

注意:每空不超过3个单词。

The best thing you can say about the roofs of most city buildings is that you don’t have to look at them much. That’s very good, since and urban landscape viewed from above can be and unlovely thing-block after block of tarred(铺有沥青的)black rooftops, sticky in summer, windswept in winter, ugly year-round. Or at least that’s the way it used to be.

But urban roofs are going green. Environmental designers have begun to realize that the tops of buildings don’t have to be wastelands. Indeed, they can be gardens, planted with grasses, flowers and bushes.

A planted roof usually comes in one of two varieties: extensive or intensive. The extensive type is wide and shallow, with a soil depth of less than 8 inches, able to support smaller plants, The intensive type may be smaller, but it’s relatively deeper and home to larger plants.

Whatever the design, green roofs are not so simple as ordinary gardens. They have multiple layers beneath the soil, including a drainage layer, waterproofing, structural support, and so on .

But this system can do a great deal of good. A recent paper in the journal BioScience tells that green roofs can control temperature, contain water and clean the air. And most impressively, they can cut heat loss from a building by 50%, lower air-conditioning costs by 25%, and reduce the urban-heated-island effect by 2℃.

Of course, apart from the square feet greened and heat reduced, green roofs are even more valued since people can gain some psychological comfort simply by having a quiet place to go. As so often happens, what’s good for the planet can also be good for the spirit.

 There are various reasons why cancers appear to be on the increase. For one thing, though their sufferers are to be found in all age groups, cancers are particularly likely to attack persons in their middle and advanced years. Naturally, since people live longer these years, there are more cancer sufferers than before. Again, with better methods of diagnosis (诊断), doctors can more easily recog??nize cancerous growths that would formerly have passed unnoticed or that would have been wrongly di??agnosed. It is also believed that certain habits and conditions of modem living, including heavy smok??ing and the pollution of the air, may leave people living in more cancer-causing conditions than before.

We all look forward to the day when a simple medical test can find cancer while it is still small. Researchers around the world are working on such a test. Most of their work deals with the examina??tion of the blood.

Researchers in Boston have found something in the blood of cancer patients that does not appear in healthy persons. The test showed which persons had cancer and which did not. It was correct more than 90 percent of the time.

The researchers believe the test may be able to show cancer very clearly in its development. Cancers discovered early usually can be treated successfully.

The test examines very small bits of fat in the blood called lipids (脂质). Cancers seem to change lipids although doctors do not know why. The test showed differences between the lipids of the persons with cancer and the lipids of those without cancer.

The researchers say the new test could be a step to develop a simple way to check patients for cancer before the disease shows on an X-ray.

. Who will fail cancer from the study of the researchers?

A. The young.                           B. The middle age and the older.

C. The man.                               D. The woman.

The underlined words "such a test" refer to________.

A. the test that shows which persons have cancer and which don’t     .

B. the test that may be able to show cancer very early in its development,.

C. a simple medical test that cannot find cancer when it is -small

D. a new test that could be a step to develop a difficult way

. Which of the following statements is true according to the passage?

A. Cancers have much to do with something in patients’ blood.

B. People living in better conditions are most likely to be attacked by cancer.

C.X-raying is the best way to determined whether a person has cancer or not.

D. Cancers have nothing to do with a person’s habits and living conditions.

. What would be the best title for the passage?

A. A simple way to cancer                 B. Cancers can be cured

C. How to find cancer                    D. Early discovery of cancer

I can still remember the first day when I met my best friend. She had just moved into the neighborhood and her grandmother brought her down to 1   me. I hid behind my mother and she hid behind her grandmother,  2  to look at each other. Soon, we lost the shyness and started playing with each other. In 7th grade, I first lost 3   with her. She was  4   family problems and I deserted her.  5   of my new friends liked her 6  they knew she had “problems”.
It was last year when I noticed the 7  . I guess I was just to catch up in high school to realize she 8  someone there for her. I didn’t know 9, but she started cutting herself!
She was 10  from clinical depression(抑郁), and had to go to a 11  during the day. I was very upset at first but with the late night 12 , and meeting each other at midnight. I wanted to be there for her since her new best friend once 13  her since people were calling her crazy.
Yesterday she came to me and said this:“I never knew what a best friend was 14  you were the only person that would 15 me from cutting; the only person that ever made me feel better about myself and my problems. You don’t know this but I was trying to 16  myself that night you called me. You didn’t even know you were 17  me. I owe you so much.”
We both cried. And I guess a kind of 18  from my life is:“never give up on your friends”. Even if they aren’t as cool as others, or people think they are 19 , they need someone there. If you desert them, you will only be 20  yourself. So if a friend needs you, and you care for them, you can never desert them.

【小题1】
A.callB.findC.meetD.know
【小题2】
A.scaredB.surprisedC.gladD.eager
【小题3】
A.communicationB.friendshipC.relationD.touch
【小题4】
A.breaking throughB.going throughC.seeing throughD.getting through
【小题5】
A.NoneB.AllC.EachD.Neither
【小题6】
A.even ifB.howeverC.as ifD.because
【小题7】
A.problemB.coolnessC.assessmentD.sadness
【小题8】
A.hadB.wantedC.neededD.expected
【小题9】
A.howB.whyC.whenD.where
【小题10】
A.datingB.sufferingC.separatingD.originating
【小题11】
A.hospitalB.teacherC.friendD.school
【小题12】
A.comfortsB.conversationsC.persuasionsD.calls
【小题13】
A.likedB.respectedC.desertedD.hated
【小题14】
A.whenB.untilC.beforeD.after
【小题15】
A.protectB.supportC.stopD.warn
【小题16】
A.controlB.killC.forgetD.enjoy
【小题17】
A.hurtingB.ignoringC.remindingD.helping
【小题18】
A.factB.truthC.lessonD.experience
【小题19】
A.unfriendlyB.coolC.strangeD.crazy
【小题20】
A.unhappyB.foolishC.impressiveD.anxious

 

SECTION B

Directions: Read the following passage. Answer the questions according to the information given in the passage and the required words limit. Write your answers on your answer sheet.

Fast food and too much TV time should not take all the blame for the weight problems. A group of researchers say that a number of aspects of modern living from lack of sleep to environmental chemicals and to living with air conditioning ——may be closely related to the weight problems of many people.

Lack of sleep is one of factors. Research in animals and humans suggest that a lack of sleep over a long time can increase appetite. Studies also show that many adults and children are sleeping less than they used to. In recent decades, adults have gone from sleeping for all average of nine hours to about seven hours.

There is also evidence that industrial chemicals may increase body fat. These chemicals, which are used in products, change hormonal activity when they get into the body. Studies suggest that people have been getting more and more of these chemicals through the food chain in recent decades.

Another factor that may be making people overweight is air conditioning . The body burns calories when forced to eat less in hot and wet weather, but air conditioning makes it unnecessary for the body to make any adjustment.

Researchers also list other possible risk factors for overweight , including more older mothers, whose children may become overweight more easily; a number of medicines which can lead to weight gain ; and fewer people who smoke, since people often gain weight when they stop smoking because nicotine can make people eat less.

No one is suggesting that people should stop working and sleep more, or keep smoking. When it comes to any person's weight, what really matters is how much they eat and how much of the food they use every day. That means diet and exercise are still the key.

81. Why does lack of sleep will result in weight problem?  (no more than 5 words)

_______________________________________________________

82. How long do adults averagely sleep nowadays?  (no more than 2 words)

_______________________________________________________

83. How do the industrial chemicals affecting our weight come into our body?

( no more than 4 words)

________________________________________________________

84. What’s the main idea of this passage?  (no more than 18 words)

________________________________________________________

 

“Everybody in this city wants a car, and I’m no exception. A car brings with it the freedom to travel”, said a friend of mine while reading a car magazine. I might not agree with him, but no doubt he was speaking for a rapidly growing number of middle-class Chinese. While it is true that all the waiting, walking, being part of a crowd, and sweating, are somewhat unpleasant, there are many problems which can arise when our lives rely too much on this invention.

First of all, in terms of polluting the environment, driving a car is the worst act an average person can commit. Beijing now finds itself at the top of the list of the most polluted capital cities in the world with Mexico City in the second place. Research also shows that by 2010 around 90% of total pollutants in Shanghai have come from cars. These pollutions are extremely dangerous to our health. They can damage the lungs, cause cancer, and damage the brain.

Apart from environmental problems, relying too much on cars also creates social problems such as traffic jams, road accidents, and noise pollution. The jeeps that proudly drive through the Hutongs in Beijing as if they are in a race often annoy me, and to make it worse, these drivers seldom respect cyclists.

Of course, we cannot forget the convenience that cars bring us when we need to travel far, but I often find it faster to cycle from one place to another within the city of Beijing, especially with the growing traffic jams.

Since people travel further and more frequently than before, cars will certainly be important in the future. At the same time, however, let us work hard to make sure that this invention brings us a more convenient lifestyle rather than trouble and disease. Let us make good use of cars.

1.What is this passage mainly about?

   A. Environmental problems.

   B. Traffic jams in Beijing.

   C. Problems brought about by cars.

   D. Benefits of using cars.

2. The underlined word commit in Paragraph 2 has the close meaning as ____ .

   A. do something right or legal

   B. do something wrong or illegal

   C. do something good and meaningful

   D. do something bad and meaningless

3.What do we know about the author?

   A. The author doesn’t want a car.

   B. The author agrees that a car offers freedom to travel.

   C. The author suggests that we should rely on bicycles.

   D. The author thinks that the invention of cars leads to many problems.

4.In Paragraph 3, what does the author mean by saying “The jeeps… often annoy me”?

   A. The author is troubled by the way jeeps are driven in the Hutongs of Beijing.

   B. The author thinks that Hutongs are too narrow for jeeps to drive through.

   C. The author thinks that the jeeps are too noisy.

   D. The author is worried that more accidents are caused by jeeps than any other cars.

5.What is the author’s idea in Paragraphs 4 and 5 ?

   A. Cars are only convenient for people traveling far.

   B. We should all give up cars and ride bicycles.

   C. Cars have brought us more convenience than troubles.

   D. We should choose between the car and the bicycle according to the situation.

 

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网