精英家教网 > 高中英语 > 题目详情

Unless we spend money spotting and preventing asteroids(小行星) now, one might crash into Early and destroy life as we know it, say some scientists.

Asteroids are bigger versions of the meteoroids(流星) that race across the night sky. Most orbit the sun far from Earth and don’t threaten us. But there are also thousands of asteroids whose orbits put them on a collision course with Earth.

Buy $50 million worth of new telescopes right now. Then spend $10 million a year for the next 25 years to locate most of the space rocks. By the time we spot a fatal one, the scientists say, we’ll have a way to change its course.

Some scientists favor pushing asteroids off course with nuclear weapons.  But the cost wouldn’t be cheap. Is is worth it? Two things experts consider when judging any risk are: (1)How likely the event is; and (2) How bad the consequences if the event occurs. Experts think an asteroid big enough to destroy lots of life might strike Earth once every 500 000 years. Sounds pretty rare-but if one did fall, it would be the end of the world. “If we don’t take care of these asteroids, they’ll take care of us,”says one scientist.  “It’s that simple.”

 The cure, though, might be worse than the disease. Do we really want fleets of nuclear weapons sitting around on Earth? “The world has less to fear from doomsday(世界末日) rocks than from a great nuclear fleet set against it,” said a New York Times article.

9.What does the passage say about asteroids and meteoroids?

A.They are heavenly bodies different in composition.

  B.They are heavenly bodies similar in nature.

C.There are more asteroids than meteoroids.

D.Asteroids are more mysterious than meteoroids.

10.What do scientists say about the collision of an asteroid with Earth?

A.It is very unlikely but the danger exists.

B.Such a collision might occur once every 25 years.

C.Coilisions of smaller asteroids with Earth occur more often than expected.

  D.lt’s still too early to say whether such a collision might occur.

11.What do people think of the suggestion of using nuclear weapons to alter the course of asteroids?

A.It sounds practical but it may not solve the problem.

B.It may create more problems than it might slove.

C.It is a waste of money because a collision of asteroids with Earth is very unlikely.

D.Further research should be done before it is proved applicable.

12.We can conclude from the passage that .      

A.while pushing asteroids off course nuclear weapons would destroy the world

B.asteroids racing across the night sky are likely to hit Earth in the near future

C.the worry about asteroids can be left to future generations since it is unlike to happen in our    lifetime.

D.workable solutions still have to be found to prevent a collision of asteroids with Earth

9-12  BABD


解析:

9. 文章第二段第一句指出,小行星是比划过夜空的流星大的天体。可见二者是性质相同的天体,只是大小不同。

10.  文章第二段后两句指出,绝大多数的小行星围绕太阳运行。远离地球,不会威胁到我们。但仍然有上千颗小行星可能撞击地球。可见,小行星与地球相撞的可能性很小,但危险确实存在。B项为概念错误。文章第三段指出,确定大多数小行星的位置需要25年。文章第五段又提到,大到足以有很强毁灭性的小行星可能每五十万年与地球碰撞一次,可见B项是错误的,C项文中没有提到,D项与文章内容不符。

11.  注意最后一段第一句中,“cure”指解决办法,即用核武器改变小行星的运行轨道,而“disease”指小行星可能与地球碰撞这件事情。由此本句可理解为核武器会比小行星带来更糟的后果,并且带给人们更大的恐慌。故选B项。

12.  应依据全文内容作出选择。全文一再强调小行星与地球碰撞的危险性,但没有提及在不久的将来会发生,故排除B项。文章最后提出对付小行星的核武器在改变小行星运行轨道的同时会毁灭地球,那么可以得出结论:解决小行星撞击地球的可行的办法有待进一步的探索。A项是事实,而不是结论。

练习册系列答案
相关习题

科目:高中英语 来源: 题型:阅读理解

Recently I gave my adult students homework. It was to "go to someone you love and tell them you love them. It has to be someone you have  36  said those words to before or at least haven't  37  those words with for a long time. "

       Since most of the men were over 35 and were raised in the  38  of men that were taught  39  feelings is not "manly", this was very  40  homework for some.

       In our next  41 , I asked if someone wanted to share his story with us. I fully _42 one of the women to volunteer, as was  43  the case, but on this evening one of the men raised his hand. As he  44 out of his chair (all 1.85 meters of him), he began by saying, "Dennis, I was quite  45  with you last week when you gave us this homework.  46  were you to tell me to do something so personal? But as I began driving home my heart started talking to me, telling me that I knew  47  who I needed to say 'I love you' to. "

       "My father and I had a severe  48  five years ago, and since then we had  49  seeing each other unless we had to at Christmas. But even then, we hardly  50  to each other. So last Tuesday I drove to my parents' house after work and said, 'Dad, I just  51 to tell you that I love you. '"

       "Dad reached out and  52  me and said, 'I love you too, son, but I've never been able to say it.' Two days after my visit, my dad had a heart attack and I don't know if he will  53  it. So, I'm here to tell all of you that my  54  in this is: Don't wait to do the thing  55  it is too late. Take the time to do what you need to do and do it now!"

A. ever               B. always                  C. never                D. even

A. said                B. shared            C. talked            D. discussed

A. year               B. occasion            C. period            D. generation

A. explaining      B. hurting              C. devoting            D. expressing

A. interesting      B. threatening       C. interested          D. exciting

A. class               B. term                 C. holiday             D. week

A. asked             B. disliked             C. advised             D. expected

A. often              B. probably           C. not                   D. seldom

A. sat                 B. rose                  C. jump                 D. struggle

A. bored             B. amused             C. curious              D. angry

A. How                     B. Why                 C. Who                 D. What

A. exactly           B. immediately      C. directly             D. simply

A. condition        B. discussion       C. disagreement     D. experiment

A. hated              B. avoided             C. reduced             D. continued

A. spoke             B. smiled            C. looked                  D. turned

A. dropped out    B. ran across          C. came over      D. came across

A. touched          B. tested                C. inspired             D. hugged

A. get                 B. make                C. deserve             D. overcame

A. sense              B. point                 C. thought             D. message

A. until               B. when                C. before            D. as

查看答案和解析>>

科目:高中英语 来源: 题型:

We can never expect____ bluer sky unless we create_____less polluted world.

A. a; a                                   B. a; the

C. the; a                                 D. the; the

查看答案和解析>>

科目:高中英语 来源:2009年普通高等学校招生全国统一考试湖北卷英语试题 题型:阅读理解

Sunday is more like Monday than it used to be. Places of business that used to keep daytime “business hours” are now open late into the night. And on the Internet, the hour of the day and the day of the week have become irrelevant (不相关的). A half century ago in the United States, most people experienced strong and precise dividing lines between days of rest and days of work, school time and summer time. Today the boundaries still exist, but they seem not clear.
The law in almost all states used to require stores to close on Sunday; in most, it no longer does. It used to keep the schools open in all seasons except summer; in most, it still does. And whether the work week should strengthen its legal limits, or whether it should become more “flexible,” is often debated. How should we, as a society, organize our time? Should we go even further in relaxing the boundaries of  time until we live in a world in which every minute is much like every other?
These are not easy questions even to ask. Part of the difficulty is that we rarely recognize the “law of time” even when we meet it face to face. We know as children that we have to attend school a certain number of hours, a certain number of days, a certain number of years—but unless we meet the truant officer (学监), we may well think that we should go to school due to social custom and parents’ demand rather than to the law. As adults we are familiar with “extra pay for overtime working,” but less familiar with the fact that what constitutes (构成)“overtime” is a matter of legal definition. When we turn the clock forward to start daylight-saving time, have we ever thought to ourselves: “Here is the law in action”? As we shall see, there is a lot of law that has great influence on how we organize and use time: compulsory education law, overtime law, and daylight-saving law — as well as law about Sunday closing, holidays, being late to work, time zones, and so on. Once we begin to look for it, we will have no trouble finding a law of time to examine and assess.
【小题1】By saying “Sunday is more like Monday than it used to be”, the writer means that_____ .

A.work time is equal to rest time
B.many people have a day off on Monday
C.it is hard for people to decide when to rest
D.the line between work time and rest time is unclear
【小题2】The author raises the questions in Paragraph 2 to introduce the fact that people
A.fail to make full use of their timeB.enjoy working overtime for extra pay
C.are unaware of the law of timeD.welcome flexible working hours
【小题3】According to the passage, most children tend to believe that they go to school because they ______.
A.need to acquire knowledgeB.have to obey their parents
C.need to find companionsD.have to observe the law
【小题4】What is the main idea of the passage?
A.Our life is governed by the law of time.
B.How to organize time is not worth debating.
C.New ways of using time change our society.
D.Our time schedule is decided by social customs.

查看答案和解析>>

科目:高中英语 来源:2013-2014学年甘肃武威七中高二年级9月月考英语卷(解析版) 题型:短文改错

英语课上,老师要求同桌同学相互修改作文。假设以下便条为你同桌所写,请你对其进行修改。便条中共有10处错误,每句中最多有两处。错误涉及一个单词的增加、删除或修改。

增加:在缺词处加一个漏词符号(^),并在此符号下面写出该加的词。

删除:把多余的词用斜线(\)划掉。

修改:在错的词下划一横线,并在该词下面写出修改后的词。

注意:1.每处错误及其修改均仅限一词。

2.只允许修改10处,多者(从第11处起)不计分。

3.必须按答题要求做题,否则不给分。

Dear Editor.

I’m a middle school student named Li Hua. I’m writing tell you something. Recently I noticed that many of my schoolmates often go to the Internet bar near our school. The other day, I went there, either.I was surprising to see many students playing computer games, seeing movies or were chatting. Some students were even sending love letter online. In my opinion, Internet bar should be a place which we can find much usefully information. Internet should be a window to the outside world rather than a place for playing games. Internet is good unless we make good use of it. Otherwise, they will do us great harm. So the local government should take measures to make sure of the “safety” of students in the Internet bars.

 

查看答案和解析>>

科目:高中英语 来源:20102011学年福建省高二下学期第一次月考英语卷 题型:阅读理解

Recently I gave my adult students homework. It was “go to someone you love and tell them you love them.” It has to be someone you have never said those words to before or at least haven’t shared those words with for a long time.

It sounds like very tough homework since most of the men were over 35 and were raised in the generation of men that were taught expressing emotions is not “macho (阳刚之气).” Showing feelings or crying was just not done. So this was very threatening homework for some.

At the beginning of our next class, I asked if someone wanted to share what happened when they told someone they loved them. I fully expected one of the women to volunteer, as was usually the case, but on this evening one of the men raised his hand, quite moved and a bit shaken.

As he unfolded out of his chair (all 1.85 meters of him), he began by saying, “Dennis, I was quite angry with you last week when you gave us this homework. Who were you to tell me to do something that personal?”

“But as I began driving home my conscience (良心)started telling me that I knew exactly who I needed to say ‘I love you’ to.”

“Five years ago, my father and I had a severe disagreement and really never settled it since then. We avoided seeing each other unless we absolutely had to at Christmas or other family gatherings. But even then, we hardly spoke to each other.”

“So last Tuesday by the time I got home I had convinced myself. I was going to tell my father I loved him. It’s strange, but just making that decision seemed to lift a heavy load off my chest.

1. The homework is threatening for some students because_________.

A. they are middle-aged people  B. they are not macho enough

C. they were taught to hide their emotions  D. they didn’t know how to show feelings

2. From the passage we know that_________.

A. the adult students have classes in the day time only

B. not all the adult students in the writer’s class are male

C. the man refused to meet his father after their quarrel

D. the man quickly decided to say “I love you” to his father

3. The underlined phrase “unfolded out of his chair” in Para 4 is closest in meaning to_________.

A. stood on his chair straight  B. sat quietly in the chair

C. bent himself over his chair  D. raised himself slowly from the chair

4. What does the man imply by saying the underlined sentence in the last paragraph?

A. He felt it too strange to say “I love you” to his father.

B. He felt relaxed just thinking of saying “I love you” to his father.

C. He felt very relaxed after saying “I love you” to his father.

D. He had to lift a heavy load off his chest before saying “I love you”.

 

 

查看答案和解析>>

同步练习册答案