题目内容

It is easier to float in the ocean than it is to float in a swimming pool. Do you know why?

Ocean water is full of salt— and salt water can hold up more weigh than fresh water. See for yourself!

You Will Need:

● 3 cups of warm water

● Measuring cup (量杯)

● Wide-mouthed jar

● Salt

● Spoon

● Raw (生的)potato

You Will Do:

1. Pour 1.5 cups of warm water into the jar.

2. Add 1/3 cup of salt.

3. Stir(搅拌) until the salt is completely dissolved.

4. Add another 1.5 cups of water. Pour it slowly over the back of the spoon into the jar so that the two liquid will not mix together.

5. Gently place the potato into the jar. Do not drop it.

What Will Happen:

The potato will sink— but only halfway!

Why?

Salt water is heavier than fresh water, so it will stay on the bottom. The fresh water will remain on top.

The potato is heavier than the fresh water, but it is lighter than the salt water. That is why the potato will sink halfway down.

1.In the experiment, what should you do right after you pour the water over the spoon?

A．Add the salt to the water.                 B．Stir the salt into the water.

C．Place the potato in the jar.                 D．Pour warm water into thejar.

2.In Step 4 of the experiment, why do you pour the water over the spoon “slowly”?

A．It is easier to see what you are doing.

B．It pushes the fresh water to the bottom.

C．It will keep the water from coming out.

D．It will keep the liquids from mixing together.

3.In which step of the experiment do you add the salt?

A．Step 1            B．Step 2            C．Step 3            D．Step 4

4.What does the underlined word “gently” mean?

A．Carefully          B．Quickly           C．Secretly           D．Silently

 

【答案】

1.C

2.D

3.B

4.A

【解析】

试题分析：本文介绍了一个证明盐水的浮力比淡水的浮力大的实验。

1.C 细节题。根据You Will Do:中的5 Gently place the potato into the jar. Do not drop it说明C正确。

2.D 细节题。根据Add another 1.5 cups of water. Pour it slowly over the back of the spoon into the jar so that the two liquid will not mix together中的so that the two liquid will not mix together指这两种液体不要混在一起。故D正确。

3.B 细节题。根据You Will Do:中的2 Add 1/3 cup of salt.说明B正确。

4.A 推理题。根据Gently place the potato into the jar. Do not drop it中的Do not drop it不要扔下去，说明要轻轻地放，故A正确。

考点：考查科普类实验

点评：本文考查的细节题特多，答题时在文章找到对应的地方，用笔进行标记，这有利于后期有时间检查时可以立刻找到答案的位置。仔细理解作者所讲的意思，再结合选项，通过排除法和自己对全文的把握，选出正确答案。

 

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Passage four(preface)

  Science is a dominant theme in our culture. Since it touches almost every facet of our life, educated people need at least some acquaintance with its structure and operation. They should also have an understanding of the subculture in which scientists live and the kinds of people they are. An understanding of general characteristics of science as well as specific scientific concepts is easier to attain if one knows something about the things that excite and frustrate the scientist.

  This book is written for the intelligent student or lay person whose acquaintance with science is superficial; for the person who has been presented with science as a musty storehouse of dried facts; for the person who sees the chief objective of science as the production of gadgets; and for the person who views the scientists as some sort of magician. The book can be used to supplement a course in any science, to accompany any course that attempts to give an understanding of the modern world, or – independently of any course – simply to provide a better understanding of science. We hope this book will lead readers to a broader perspective on scientific attitudes and a more realistic view of what science is, who scientists are, and what they do. It will give them an awareness and understanding of the relationship between science and our culture and an appreciation of the roles science may play in our culture. In addition, readers may learn to appreciate the relationship between scientific views and some of the values and philosophies that are pervasive in our culture.

  We have tried to present in this book an accurate and up-to-date picture of the scientific community and the people who populate it. That population has in recent years come to comprise more and more women. This increasing role of women in the scientific subculture is not an unique incident but, rather, part of the trend evident in all segments of society as more women enter traditionally male-dominated fields and make significant contributions. In discussing these changes and contribution, however, we are faced with a language that is implicitly sexist, one that uses male nouns or pronouns in referring to unspecified individuals. To offset this built-in bias, we have adopted the policy of using plural nouns and pronouns whenever possible and, when absolutely necessary, alternating he and she. This policy is far form being ideal, but it is at least an acknowledgment of the inadequacy of our language in treating half of the human race equally.

  We have also tried to make the book entertaining as well as informative. Our approach is usually informal. We feel, as do many other scientists, that we shouldn’t take ourselves too seriously. As the reader may observe, we see science as a delightful pastime rather than as a grim and dreary way to earn a living.

1.According to the passage, ‘scientific subculture’ means

A.cultural groups that are formed by scientists.

B.people whose knowledge of science is very limited.

C.the scientific community.

D.people who make good contribution to science.

2.We need to know something about the structure and operation of science because

A.it is not easy to understand the things that excite and frustrate scientists.

B.Science affects almost every aspect of our life.

C.Scientists live in a specific subculture.

D.It is easier to understand general characteristics of science.

3.The book mentioned in this passage is written for readers who

A.are intelligent college students and lay person who do not know much about science.

B.are good at producing various gadgets.

C.work in a storehouse of dried facts.

D.want to have a superficial understanding of science.

4.According to this passage,

A.English is a sexist language.

B.only in the scientific world is the role of women increasing rapidly.

C.women are making significant contributions to eliminating the inadequacy of our language.

D.male nouns or pronouns should not be used to refer to scientists.

5.This passage most probably is

A.a book review.

B.the preface of a book.

C.the postscript of a book.

D.the concluding part of a book.

       Be Brave With New Things

   The old advertising slogan, “so simple a child can do it ,” has taken on new meaning to me. A few weeks ago I got a computer, but I an mechanically illiterate. I knew that children had no fear of the future, so that seemed a good place to seek help. I asked my nephew, twelve years old, at an elementary school, to help me.

   My nephew took the machine for granted and has simply accepted the fact that computers are now a way of life. He plays with them and does his homework on them and even creates programs for them. I , on the other hand, are terrified by what this equipment can do. It can interchange paragraphs, switch words around and even correct my spelling. It informs me of Its limitations, takes commands and asks questions. It even seems to have a sense of communication. Rather than accusing me of making an error, it prints “One of us has made a mistake!” It never gets tired and is always patient and ready to go when I am.

   I think it was somewhat normal for me to be suspicious of computers. They represent a break with some very familiar habits and traditions. It is only human to instinctively avoid anything that shifts thoroughly from the acceptable, comfortable past. But the world is governed by ceaseless change and we must therefore establish links with the present and future as well as the past. Computer technology is an excellent case in point, as the newest systems grow out of date in only a few years, or even months.

   This ability to see, experience and accept the new is one of our saving characteristics. To be fearful of tomorrow, to close ourselves to possibilities, to resist the inevitable, to advocate standing still when all else is moving forward, is to lose touch. If we accept the new with joy and wonder, we can move gracefully into each tomorrow. More often than not, the children shall lead us.

6．What is the new meaning of  “So simple a child can do it” for the author?

A．computers are so easy to operate that even a child can play them well

B．A child can always do more complex things than an adult.

C．It is easier for a child to accept new things than for an adult.

D．A child has greater ability than an adult in operating computers.

7．According to the second paragraph, which of the following statements is true?

A．The nephew thought it is natural to accept the fact that computers are now a way of life.

B．The nephew believed that machines were made for people to do whatever they wanted.

C．computers are not only used to communicate, but also to remove their limitations.

D．It is a fact that both adults and children have accepted computers as a way of life.

8．Which of the following doesn’t the author’s computer do ?

A．It asks the author if she has made a mistake.

B．It accuses the author of making mistakes.

C．It corrects the author’s spelling mistakes.

D．It informs the author of her mistakes.

9．According to the third paragraph, it is human nature that we resist those things which   

A．only represent the comfortable and acceptable past

B．change thoroughly into the comfortable and acceptable past

C．make people stand still when all else is moving forward

D．change completely from the acceptable and comfortable past

10．How do you understand the underlined sentence in the  text?

　　A. It is always ready to inform me when I am ready to go.

　　B. It is always ready to start working when I am ready for work.

　　C. When I am ready to go, it is patient to wait.

　　D. When I am ready to go, it has already gone.

Play is the basic business of childhood, and in recent years research has shown the great importance of play in the development of a human being. From earliest infancy (婴儿), every child needs opportunity and right materials for play, and the main tools of play are toys. The main function of toys is to suggest, encourage and play. To succeed in this, they must be good toys, which children will play with often, and will come back again and again. Therefore, it is important to choose suitable toys for different stages of a child’s development.

In recent years research on infant development has shown that the standard a child is likely to reach, within the range of his inherited abilities, is largely determined in the first three years of his life. So a baby’s ability to benefit from the right play materials should not be underestimated. A baby who is encouraged, talked to and shown things and played with, has the best chance of growing up successfully.

In the next stage, from three to five years old, curiosity knows no bounds. Every type of suitable toys should be made available to the child, for trying out, experimenting and learning, for discovering his own particular ability: Bricks and jigsaws and construction toys; painting, scribbling and making things; sand and water play; toys for imaginative and pretending play—the first social games for learning to play and get on with others.

But at the third stage of play development—from five to seven or eight years old— the child is at school. But for a few more years play is still the best way of learning, at home or at school. It is easier to see which type of toys the child most enjoys.

Until the age of seven or eight, play and work mean much the same to a child. But once reading has been mastered, then books become the main source of learning. Toys are still interesting and valuable, which lead up to new hobbies, but their significance has changed — to a child of nine or ten years old, toys and games mean, as to adults, relaxation and fun.

According to the first passage we know that as a child grows up, ______.

   A. he should be allowed to choose his own toys

   B. he should be given the same toys

   C. he should be given fewer and fewer toys

   D. he should be given different toys

According to the passage, the abilities a child has inherited from his parents ______.

   A. determine his character

   B. will not change after the age of three

   C. partly determined the standard he is likely to reach

   D. to a large extent determine the choice of toys

We learn from the passage that a child has boundless curiosity ______.

   A. when he is two                    B. when he is around four

   C. when he is six                     D. when he is eight

The passage is mainly about _______.

A. the role of play in a child’s development

B. the importance of schooling

C. the importance of pre-school education

D. the choice of toys for youngster

Be Brave With New Things

   The old advertising slogan, “so simple a child can do it ,” has taken on new meaning to me. A few weeks ago I got a computer, but I an mechanically illiterate. I knew that children had no fear of the future, so that seemed a good place to seek help. I asked my nephew, twelve years old, at an elementary school, to help me.

   My nephew took the machine for granted and has simply accepted the fact that computers are now a way of life. He plays with them and does his homework on them and even creates programs for them. I , on the other hand, are terrified by what this equipment can do. It can interchange paragraphs, switch words around and even correct my spelling. It informs me of Its limitations, takes commands and asks questions. It even seems to have a sense of communication. Rather than accusing me of making an error, it prints “One of us has made a mistake!” It never gets tired and is always patient and ready to go when I am.

   I think it was somewhat normal for me to be suspicious of computers. They represent a break with some very familiar habits and traditions. It is only human to instinctively avoid anything that shifts thoroughly from the acceptable, comfortable past. But the world is governed by ceaseless change and we must therefore establish links with the present and future as well as the past. Computer technology is an excellent case in point, as the newest systems grow out of date in only a few years, or even months.

   This ability to see, experience and accept the new is one of our saving characteristics. To be fearful of tomorrow, to close ourselves to possibilities, to resist the inevitable, to advocate standing still when all else is moving forward, is to lose touch. If we accept the new with joy and wonder, we can move gracefully into each tomorrow. More often than not, the children shall lead us.

19．What is the new meaning of  “So simple a child can do it” for the author?

A．computers are so easy to operate that even a child can play them well

B．A child can always do more complex things than an adult.

C．It is easier for a child to accept new things than for an adult.

D．A child has greater ability than an adult in operating computers.

20．According to the second paragraph, which of the following statements is true?

A．The nephew thought it is natural to accept the fact that computers are now a way of life.

B．The nephew believed that machines were made for people to do whatever they wanted.

C．computers are not only used to communicate, but also to remove their limitations.

D．It is a fact that both adults and children have accepted computers as a way of life.

21．Which of the following doesn’t the author’s computer do ?

A．It asks the author if she has made a mistake.

B．It accuses the author of making mistakes.

C．It corrects the author’s spelling mistakes.

D．It informs the author of her mistakes.

22．According to the third paragraph, it is human nature that we resist those things which   

A．only represent the comfortable and acceptable past

B．change thoroughly into the comfortable and acceptable past

C．make people stand still when all else is moving forward

D．change completely from the acceptable and comfortable past

Now some women are spending a weekend at Mother’s Camp（营地）. There, husbands and children are not allowed. Why would a woman want to take a vacation without her family? Some women say they need time to be alone.
At Mother’s Camp a woman has room to herself. She can sleep, read or watch TV, and no one will bother her. No children will ask, “Mom, what’s for dinner?” No husband will say, “Oh, dear, I can’t find any clean socks.” In fact almost 50% of women in the United States work outside the home. Many of them work full-time and then come home to a second job----taking care of their homes and families. These working women say one of their biggest problems is housework.
In the United States, working wives do about 75% of the housework. Many of their husbands say they want to help. But then they burn the rice or they can’t find the pans. They ask so many questions that their wives decide it is easier to do the job themselves.
Some women go to Mother’s Camp just to get a break from housework. For two days they don’t cook, they don’t clean, they don’t look after their children and husbands. What do they do? They enjoy warm, sunny weather, walking, swimming or boating in a clear blue lake and sing songs around the campfire. They relax away from home. They have a really wonderful vacation at Mother’s Camp.
【小题1】 From this passage we can see      in the United States.

A．women want to work outside the home
B．working wives do most of the housework
C．husbands do as much housework as their wives
D．women do not like to stay at home with their families
【小题2】At Mother’s Camp, women can’t         .
A．watch TVB．read newspapers
C．swim in the lakeD．bring their husbands and children
【小题3】Why would some mothers like to be alone? Because        .
A． they don’t like their husbands and children
B． they have to work full-time
C． they are too busy to relax themselves
D． they want a new life
【小题4】        is one of the biggest troubles for working wives in the United States.
A．HouseworkB． Working outside the home
C．When to take a vacationD． Looking after their children
【小题5】What’s the best title for this passage?
A．Busy Working MothersB．Welcome to Mother’s Camp
C．Mothers Relax Away from Home D．Mothers in the US

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