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    Extract 2 is probably taken from . A.a computer textbook B.a company's advertisement C.a teach-yourself computer book D. a children's guide to computers C When did you last see a polar bear?On a trip to a zoo,perhaps?If you had attended a winter activity in New York a few years ago,you would have seen a whole polar bear club.These "Polar Bears" are people who meet frequently in the winter to swim in freezing cold water.That day,the air temperature was 3℃,and the water temperature was a little higher.The members of the Polar Bear Club at Coney Island,New York are usually about the age of 60.Members must satisfy two requirements.First,they must get along well with everyone else in the group;this is very important because there are so many different kinds of people in the club.Polar Bears must also agree to swim outdoors at least twice a month from November through February. Dcotors don't agree about the medical effects of cold-winter swimming.Some are worried about the dangers of a condition in which the body's temperature drops so low that finally the heart stops.Other doctors,however,point out that there is more danger of a heart attack during summer swimming because the difference between the air temperature and water temperature is much greater in summer than in winter. The Polar Bears themselves are satisfied with the benefits of cold-water swimming.They say that their favorite form of exercise is very good for the circulatory systembecause it forces the blood to move fast to keep the body warm.Cold-water swimmers usually turn bright red after a few minutes in the water.A person who turns blue probably has a very poor circulatory system and should not try cold-water swimming. The main benefits of cold-water swimming are probably mental.The Polar Bears love to swim all year round;they find it fun and relaxing.As one 70-year-old woman says,"When I go into water,I pour my troubles into the ocean and let them float away." 【查看更多】

     

    题目列表(包括答案和解析)

    Extract（摘要）1 

    A computer is an "information processor".It is given information,called "data",instructed to do certain things and then show us the results.The data put into the computer is called the"input" and the results which come out are the "output".Some people say the circle of large standing stones at Stonechenge is a kind of computer.Prehistory people worked out their calendar（日历）from the position of the shadows made by the sun shining on the stones. 

    Extract 2 

    Teach yourself new subjects and skills at your own pace with a home computer.Use it to help with schoolwork,for self-improvement,even to improve your career skills.Learn touchtyping.  Foreign languages or computer programming.A home computer can help children of all ages learn classroom subjects such as spelling,geography and others.In fact it makes learning fun.So if you want to teach yourself,or help your children teach themselves-get a home computer.It can also help you manage your personal finances or help you to work taxes and plan household budgets.You can make business a pleasure with a home computer. 

    1.The writer introduces the words such as "input" and "output" in order to_____. 

    A．introduce people to computer language

    B．show computer language is the same as English

    C．help people some scientific language

    D．give people some scientific language

    2.Why does the writer talk about Stonechenge in Extract 1?

    A．To give an example of the very first computer.

    B．To show that computers are older than mankind.

    C．To tell the difference between the past and the present.

    D．To give another way of explaining computers.

    3.If you think of the circle of large standing stones as a computer,_____. 

    A．the shadow is the input and the position is the output

    B．the sunlight is the input and the calendar is the output

    C．the position is the input and the sunlight is the output

    D．the calendar is the input and the shadow is the output

    4.Extract 2 is probably taken from_____.

    A．a computer textbook

    B．a company's advertisement

    C．a teach-yourself computer book

    D．a children's guide to computers

     

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    Extract 1（摘录一）

    A computer

    A computer is an "information processor". It is given information, called "data", instructed to do certain things and then show us the results. The data put into the computer is called the" input" and the results which come out are the "output". Some people say the circle of large standing stones at Stonehenge is a kind of computer. Prehistory people worked out their calendar from the position of the shadows made by the sun shining on the stones.

    Extract 2

    Teach yourself new subjects and skills at your own pace with a home computer. Use it to help with schoolwork, for self-improvement, even to improve your career skills. Learn touchtyping.

    Foreign languages or computer programming. A home computer can help children of all ages learn classroom subjects such as spelling, geography and others. In fact it makes learning fun. So if you want to teach yourself, or help your children teach themselves---get a home computer. It can also help you manage your personal finances(经济）or help you to work taxes and plan household budgets(预算）.You can make business a pleasure with a home computer.

    1.The writer introduces the words such as "input" and "output" in order to_____.

    A．introduce people to computer language

    B．show computer language is the same as English

    C．help people some scientific language

    D．give people some scientific language

    2.Why does the writer talk about Stonehenge in Extract 1?

    A．To give an example of the very first computer.

    B．To show that computers are older than mankind.

    C．To tell the difference between the past and the present.

    D．To give another way of explaining computers.

    3.If you think of the circle of large standing stones as a computer,_____.

    A．the shadow is the input and the position is the output

    B．the sunlight is the input and the calendar is the output

    C．the position is the input and the sunlight is the output

    D．the calendar is the input and the shadow is the output

    4.Extract 2 is probably taken from_____.

    A．a computer textbook                    B．a company's advertisement

    C．a teach-yourself computer book            D．a children's guide to computers

     

    查看答案和解析>>

    Extract 1（摘录一）

    A computer

    A computer is an "information processor". It is given information, called "data", instructed to do certain things and then show us the results. The data put into the computer is called the" input" and the results which come out are the "output". Some people say the circle of large standing stones at Stonehenge is a kind of computer. Prehistory people worked out their calendar from the position of the shadows made by the sun shining on the stones.

    Extract 2

    Teach yourself new subjects and skills at your own pace with a home computer. Use it to help with schoolwork, for self-improvement, even to improve your career skills. Learn touchtyping.

    Foreign languages or computer programming. A home computer can help children of all ages learn classroom subjects such as spelling, geography and others. In fact it makes learning fun. So if you want to teach yourself, or help your children teach themselves---get a home computer. It can also help you manage your personal finances(经济）or help you to work taxes and plan household budgets(预算）.You can make business a pleasure with a home computer.

    72、The writer introduces the words such as "input" and "output" in order to_____.

        A. introduce people to computer language 

        B. show computer language is the same as English

        C. help people some scientific language

        D. give people some scientific language

    73、Why does the writer talk about Stonehenge in Extract 1?

        A. To give an example of the very first computer. 

        B. To show that computers are older than mankind.

        C. To tell the difference between the past and the present. 

        D. To give another way of explaining computers.

    74、If you think of the circle of large standing stones as a computer,_____.

        A. the shadow is the input and the position is the output

        B. the sunlight is the input and the calendar is the output

        C. the position is the input and the sunlight is the output

        D. the calendar is the input and the shadow is the output

    75、Extract 2 is probably taken from_____.

        A. a computer textbook                B. a company's advertisement

        C. a teach-yourself computer book     D. a children's guide to computers

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