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    Thousands of years ago people guessed the time of day by watching the sun.
    Later，they found it was easier to tell the exact time by looking at the shadows.Thus， the sundial(日晷) was invented.
    The sundial proved a useful timepiece  in sunny weather. However，another typc of  timepiece was necessary  for cloudy weather and nigh time.A sand glass was another  common measurer of time.Two glass bottles were connected by a very  small opening.  The top bottle was filled with sand，which dropped slowly into the botton one in a  certain period of time.Hour glasses were widely used then.Three—minute sand glasses  are still used in many homes to time the boiling of eggs.
    The real ancestor of modern clocks was the water clock.In China ,an early  water clock was made up of several bowls. Water trickled(滴) from one bowl to another to keep the clock  going. Visitors to the  Beijing Palace Museum can still see the old  water clocks showing the time there.
    In the Middle Ages a wateless clock was invented which  worked by means of  weights. To keep  the  weight  falling  at  the  same  speed，a  system  of wheels  was  invented. The pendulum(钟摆) was  soon  developed  to control  the  speed of the  wheels. Thus the modern form of clock came into being.
    9.Which of the following is the correct picturr of a sand glass?
                A.                       B.                       C.                     D.
    10.Three minute sand glasses are still used in many homes         .
    A.to boil eggs                           B.to measure the time of boiling eggs
    C.to hold the boiled eggs                 D.to have eggs boiled
    11.If you visit Beijing Palace Museum, you         .
    A.will see the old water clocks broken
    B.will find the time shown by the old water clocks is wrong
    C.can find the old water clocks still telling the time there
    D.will find the old water clocks have gone
    12.In the Middle Ages the weight falling speed of a clock was kept by .
    A.several bowls                        B.a system of wheels
    C.a system of pendulum                  D.several springs
    9-12 BBCB
    9.B 由第二段Two glass bottles were connected by a small opening可知。
    10.B 由第二段最后一句可知。
    11.C 由第三段最后一句可知。
    12.B 由最后一段第二句可知
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    科目：高中英语 来源：不详 题型：阅读理解

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    科目：高中英语 来源：不详 题型：阅读理解

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    科目：高中英语 来源：不详 题型：阅读理解

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    科目：高中英语 来源：不详 题型：阅读理解

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    Simply fill in your name and address on the coupon(票券) above. Then write in the name and number of the one program you’re most interested in, and mail it today. We’ll rush your free information about how you can take advantage of the opportunities(机会) in the field you’ve chosen. Act today!
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    科目：高中英语 来源：不详 题型：阅读理解

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    The best way to get rid of a negative serf-image is to realize that your image is far from objective, and to actively convince yourself of your positive qualities. Changing the way you think and working on those you need to improve will go a long way towards promoting a positive self-image. When you can pat(拍) yourself on the back, you’ll know you’re well on your way. Good luck!
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    C. are often changeable
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    48. How should you change your serf-image according to the passage?
    A. To keep a different image of others.
    B. To make your life successful.
    C. To understand your own world.
    D. To change the way you think.
    49. What is the passage mainly about?
    A. How to prepare for your success.   
    B. How to face challenges in your life.
    C. How to build a positive self-image.
    D. How to develop your good qualities.
    50. Who are the intended readers of the passage?
    A. Parents.
    B. Adolescents.
    C. Educators.
    D. People in general.

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    科目：高中英语 来源：不详 题型：阅读理解


    E
    Most of us are used to seasons. Each year, spring follows winter, which follows autumn, which follows summer, which follows spring. And winter is colder than summer. But the earth goes through temperature cycles over much longer periods than those that we experience.
    Between 65,000 and 35,000 years ago, the planet was much colder than it is now. During that time the temperature also changed a lot, with periods of warming and cooling. Ice melted during the warm periods, which made sea levels rise. Water froze again during the cold periods.
    A new study from Switzerland sheds light on where ice sheets melted during the ice age.
    It now seems that the ice melted at both ends of the earth, rather than just in either northern or southern areas. This surprised the researchers from the University of Bern.
    Scientists have long assumed(认为) that most of the ice that melted was in the Northern hemisphere(半球) during the 30,000-year-long ice age. That belief was held because the North Pole is surrounded by land, while the South Pole is surrounded by the Antarctic Ocean. It is easier for ice sheets to grow on land. If surrounded by sea, the ice can easily just slip to the ocean instead of building up.
    The researchers used a computer model to look at the ways the ice could melt and how it might affect sea levels. They compared these results to evidence(迹象) of how temperatures and currents actually changed during that time.
    The model showed that if it was only in the Northern hemisphere that ice melted, there would be a bigger effect on ocean currents(洋流) and sea temperatures than what actually happened. Studies suggest that melting just in the Southern hemisphere would have been impossible, too.
    The only reasonable conclusion, the scientists could make, was that the ice melted equally in the North and the South.
    It is still a mystery(谜) as to what caused the temperature changes that caused the ice to melt.
    72. We can learn from the text that _____.
    A.we have experienced temperature cycles since they began
    B.what caused ice to melt is still unknown
    C. the planet was much colder than it is now between 65,000 and 35,000 years ago, during which time temperature hardly changed
    D. before the new study, scientists long believed that ice melted just in either northern or southern areas
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    A. throws doubts on B. beats down on C. makes it clear D. makes light of
    74. The first two paragraphs were written _____.
    A. to lead up to the subject that ice melted during the 30,000-year-long ice age
    B. to describe what the weather was like during the ice age
    C. to compare climate nowadays with that of the ice age
    D. to explain what a temperature cycle is
    75. Which of the following best shows the relationship between ice, ocean currents and temperatures according to the text?
    A. Ice can easily slip into the ocean.
    B. Temperature and currents changed as a result of ice melting.
    C. Temperature changes lead to ice melting or water freezing, which in turn has an effect on ocean currents and temperature.
    D. Ice melted and then froze again due to temperature.

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    科目：高中英语 来源：不详 题型：阅读理解

    Although the U.S. is so big and its people have so many different ethnic (racial) backgrounds, it is in some ways less varied than Europe. The English language is used almost everywhere in its American form. The American way of speaking has developed independently of England and is on the whole closer to what can be heard in Ireland.
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    Although the United States covers so much land and the land produces far more food than the present population needs, its people are by now almost entirely an urban society. Less than a tenth of the people are engaged in agriculture, and most of the rest live in or around towns, large and small. Here the traditional picture is changing; most Americans do not live in small towns any more. Half the population now live in some thirty metropolitan（大城市的） areas.
    The fact that the United states has always been a single economic unit has contributed to uniformity. Modern industry favors large organizations, and it is no accident that the world’s biggest commercial firms are American. The people can choose between the products of competing manufacturers, but the products are all much alike.
    小题1:In describing the uniformity in the U.S. the author does not mention that
    A．the American people get up and go to work at the same time.
    B．the American people spend their holidays in the same pattern.
    C．the American people buy and eat the same kind of food.
    D．the American people have more or less the same income.
    小题2:What can we learn from the passage about the U.S. agriculture?
    A．The American farmers need more land than before.
    B．More and more Americans are interested in farming.
    C．It is quite modernized.
    D．It is now going backward.
    小题3:What is the feature of the U.S. modern industry according to the last paragraph?
    A．The production scale and the organizational scale are very big.
    B．It is a single economic unit that manufactures the same kind of products.
    C．There are more and more competing manufacturers.
    D．There are always a variety of products to choose from.
    小题4:What does “most of the things” in the second paragraph refer to?
    A．food, clothing and houses.
    B．Cars, computers and TV sets.
    C．Their wealth and income.
    D．Land, housing and bank savings.

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