( )下列过程中.没有发生膜融合的是 A.植物体细胞杂交 B.受精过程 C.氧进入细胞中的线粒体 D.效应B细胞产生抗体 查看更多

 

题目列表(包括答案和解析)

阅读下列短文,从每小题所给的四个选项中选出一个最佳答案。

  The United States is not the only country affected by the “computer revolution ”. All the major countries of the world have computers, and the developing countries have also realized that computers play a big part in their economic development.

  Usually what one sees is a machine that looks like a typewriter; it is called a computer terminal (终端). But computers are also used in unseen ways. For example. they determine how much time there should be between traffic signals to prevent traffic problems and to keep millions of cars moving in an orderly flow. When you buy a car, a factory process (过程) that is controlled by a computer enables you to obtain a car with your own choice of colors and special features(特征) in just a few weeks' time. In medical laboratories, computers have reduced the mistakes in testing, and they have saved doctors' countless hours of work. Before long, medical histories of all Americans will be kept in computer “banks”. If a person becomes ill far from his home, local doctors will be able to get his medical record immediately. In science, the computer has performed in minutes experiments which would have required thousands of hours of work by human hands and minds.

  Most experts agree that computers are necessary to solve the problems of increasing population, city living, and public affairs. Without computers, the jobs of solving these problems would require millions of workers to do tons of paperwork. Before any computer can work on any problem, it must be told what to do. Someone must program the computer, step-by-step. At first this was done by having the programmer write out his instructions in the form of numbers which would be “understood” by the machine. Within a short time, attempts were made to perform a system that would enable humans to communicate more easily with machines. Different “languages” were developed by means of which the programmer could use words that had meanings for him, and another program in the machine would translate the words into the computer's number system.

  Without special training, it is impossible to understand exactly how a computer does its work. However, many people without scientific training use computers in their daily lives. In some American schools, for example, young children are being taught by computers for part of the school day.

  The use of computers in school has worried some Americans. There are those who fear it will remove human element (成分) from teacher-student relationships. On the other hand, there are educators who consider computer program a valuable means of freeing teachers from the more boring and tiring tasks, thus enabling them to spend more time with a single student.

  In education, as in business and industry, science and medicine, computers play an important part in almost every type of operation. The future will bring major advances in computer technology, which will aid man in his efforts to improve the world.

1.According to the context, the author has written the passage mainly for ________ .

[  ]

A.young children

B.experienced operators

C.common readers

D.scientists in the computer field

2.Operators of computers should give instructions to work in the form of program ________ .

[  ]

A.which are introduced in turn into computers

B.through which computers could process “language”

C.which could tell computers what to do and how to do

D.all of the above

3.The arguments for computer program used in education were that

[  ]

A.computers like toys would attract much attention of school children

B.there are lots of buttons which you can press for doing anything at your will

C.computer program would take the place of teachers, turning a school into a computer world

D.computers could give teachers the opportunity to spare time to deal with students respectively

4.Which of the following best express the main idea of this passage?

[  ]

A.The world will enjoy the beautiful picture of the computers.

B.Computer technology will change the human life.

C.Computer would work freely in the future.

D.Computer would work with a great memory-storage and at highest speed.

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阅读下列短文, 从所给的四个选项中, 选出最佳答案。

           It is difficult for nearly every family to teach their children to be responsible for (对…负责) homework, but with one of the following suggestions, you really can get your children to help at home.

       If you give your children the impression that they can never do   anything quite right, then they will regard themselves as unfit or unable persons. Unless children believe they can succeed, they will never become totally independent (独立的).  

    My daughter Carla's fifth-grade teacher made every child in her class feel special. When students received less than a perfect test score, she would point out what they had mastered and declared (宣布) firmly they could learn what they had missed.

    You can use the same technique when you evaluate (评价) your child's work at home. Don't always scold but give a lot of praise instead. Talk about what he has done right, not about what he has not done. If your child completes a difficult task, reward him witha Sunday trip or a ball game with Dad.

    Learning is a process (过程) of trying and failing and trying and   succeeding. If you teach your children not to fear a mistake or a   failure, they will learn faster and achieve success at last.

1. The whole passage deals with ________.

[    ]

     A. social education   B. school education

     C. family education   D. physical education

     2. The writer thinks that ________.

     [    ]

     A. there is no way to get children to help at home

     B. it is very difficult to get children responsible for homework

     C. the more encouragement and praise they get, the more responsible    and helpful children will become

  D. children can be forced to help with housework

  3. A good suggestion the article gives us about how to evaluate your   child's work at home is to ________.

  [    ]

  A. praise his success    B. reward him with a trip

  C. give him a punishment   D. get rid of all the tests

  4. The writer advises readers to ________.

  [    ]

  A. learn from himself, for he has a good way of teaching

  B. do as what Carla's teacher did in educating children

  C. take pride in Carla's fifth-grade teacher

  D. follow Carla's example because she never fails in the test

  5. From the last paragraph, we can conclude that ________.

  [    ]

  A. pride goes before a fall  B. practice makes perfect

  C. no pains, no gains      D. failure is the mother of success

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阅读下列短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项。

  Thinking is something you choose to do as a fish chooses to live in water.To he human is to think.But thinking may come naturally without your knowing how you do it.Tbinking about thinking is the key to critical(判断性的)thinking.When you think critically,you take control of your thinking processes(过程).Otherwise,you might be controlled by the ideas of others.Indeed,critical thinking is at the heart of education.

  The word“critical”here has a special meaning.It does not mean taking one view a-gainst another view,as when someone criticizes another person for doing something wrong.The nature of critical thinking is thinking beyond the easily seen-be-yond the pictures on TV,the untrue reports in the newspapers,and the faulty reasoning.

  Critical thinking is an attitude as much as an activity.If you are curious about life and desire to dig deeper into it,you are a critical thinker.If you find pleasure in deep thinking about different ideas,characters,and facts,you are a critical thinker.

  Activities of the mind and higher-order reasoning are processes of deep and careful consideration.They take time,and do not go hand in hand with the fast speed in to-day's world:fast foods,instant coffee,and self-developing film.If you are among the people who believe that speed is a measure of intelligence(智力),you may learn some-thing new from a story about Albert Einstein.The first time Banesh Hoffman,a scien-tist,was to discuss his work with Albert Einstein,Hoffman was too nervous to speak.But Einstein immediatelyput Hoffman at ease by saying,“Please go slowly.I don't understand things quickly.”

(1)

Critical thinking is important to us because if we do not think critically,________

[  ]

A.

it will be hard for us to think naturally and fast

B.

we might be controlled by other people's ideas

C.

we will follow the ideas of others naturally

D.

we might be fooled by other people's ideas

(2)

If you are a critical thinker,you will ________

[  ]

A.

think deeply about different ideas

B.

trust the reports in the newspapers

C.

take one view against another view

D.

criticize other people for their mistakes

(3)

In the last paragraph,“something new”suggests that ________

[  ]

A.

the smarter you are,the faster you do things

B.

the faster you do things,the smarter you become

C.

speed can improve intelligence

D.

intelligence is not decided by speed

(4)

What would be the best title for the passage?

[  ]

A.

Thinking and Critical Thinking

B.

Understanding Critical Thinking

C.

Thinking Is Natural and Human

D.

Thinking Fast Means Intelligence

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阅读理解:

阅读下列短文,从所给的四个选项中,选出最佳答案.

 It is difficult for nearly every family to teach their children to be responsible for(负责) homework, but with one of the following suggestions, you really can get your children to help at home

 If you give your children the impression that they can never do anything quite right, then they will regard themselves as unfit or unable persons Unless children believe they can succeed, they will never become totally independent (独立的)

 My daughter Carla's fifth-grade teacher made every child in her class feel special When students received less than a perfect test score, she would point out what they had mastered and declared (宣布) firmly they could learn what they had missed

 You can use the same technique when you evaluate (评价) your child's work at home Don't always scold and give a lot of praise instead Talk about what he has done right, not about what he has not done If your child completes a difficult task, reward him with a Sunday trip or a ball game with Dad

 Learning is a process (过程) of trying and failing and trying and succeeding If you teach your children not to fear a mistake or a failure, they will learn faster and achieve success at last

1 The whole passage deals with ________.   

[  ]

A social education.   B school education

C family education.   D physical education

2 The writer thinks that ________.   

[  ]

A there is no way to get children to help at home

B it is very difficult to get children responsible for homework

C the more encouragement and praise they get, the more responsible and helpful children will become

D children can be forced to help with housework

3 A good suggestion the article gives us about how to evaluate your child's work at home is to ________.   

[  ]

A praise his success.   B reward him with a trip

C give him a punishment.    D get rid of all the tests

4 The writer advises readers to ________.   

[  ]

A learn from himself, for he has a good way of teaching

B do as what Carla's teacher did in educating children

C take pride in Carla's fifth grade teacher

D follow Carla's example because she never fails in the test

5 From the last paragraph, we can conclude that ________.   

[  ]

A pride goes before a fall

B practice makes perfect

C no pains, no gains

D failure is the mother of success

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假设你是李华,在出国交流学习期间,到当地一家电影院看了一场精彩的电影,但在观影过程中发现了一些问题。请你根据下列提示用英语给影院经理写一封信。

1.因广告过多;影片放映晚点;

2.影片播放音量过大;

3.安全出口标识不明,存在安全隐患;

4.适当结尾。

注意:1.词数:80~120;

2.可适当加入细节,以使行文连贯;

3.信的开头已为你写好(不计入词数)。

参考词汇:安全出口—exit 安全隐患—potential safety hazard

Dear Manager,

I’m an exchange student from China.Yesterday,I went to your cinema to see a film.The film was very good,but

____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Yours faithfully,

Li Hua

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