21.What makes a person a scientist? Does he have ways or tools of learning that are different from those of others? The answer is "no". It is not the tools a scientist uses but how he uses these tools that make him a scientist. You will probably agree that knowing how to use a power is important to a carpenter. You will probably agree, too, that knowing how to investigate, how to discover information, is important to everyone. The scientist, however, goes one step further, he must be sure that he has a reasonable answer to his questions and that his answer can be confirmed by other persons. He also works to fit the answer he gets to many questions into a large set of ideas about how the world works. The scientist\'s knowledge must be exact. There is no room for half right or right just half the time. He must be as nearly right as the conditions permit. What works under one set of conditions at one time must work under the same conditions at other times. If the conditions are different, any changes the scientist observes in a demonstration must be explained by the changes in the conditions. This is one reason that investigations are important in science. Albert Einstein, who developed the theory of relativity, arrived at this theory through mathematics. The accuracy of this mathematics was later tested through investigations, Einstein\'s ideas were shown to be correct. A scientist uses many tools for measurements. Then the measurements are used to make mathematical calculations that may test his investigations.
(1).What makes a scientist according to the passage? ___________
A.The tools he uses.
B.The way he uses his tools.
C.His ways of learning.
D.The various tools he uses.
答案:
(2).The underlined part in the passage shows___________.
A.the importance of information
B.the importance of thinking
C.the difference between scientists and ordinary people
D.the difference between carpenters and people with other jobs
答案:
(3).A sound scientific theory should be one that ___________.
A.works not only under one set of conditions at one time, but also under the same conditions at other times
B.does not allow any changes even under different conditions
C.can be used for many purposes
D.leave no room for improvement
答案:
(4).The author quotes the case of Albert Einstein to illustrate ______________.
A.that measurements are keys to success m science
B.that accuracy of mathematics
C.that investigations are important science
D.that the mathematical calculations may test his investigations
答案:
(5).What is the main idea of the passage? _____________
A.The theory of relativity.
B.Exactness is the core of science.
C.Scientists are different from ordinary people.
D.Exactness and ways of using tools are the keys to the making of a scientist.
答案:


三、客观填空题 (共 8 道试题,共 53 分)
22.When someone asks me what business I am in. My face feels hot. I envy (嫉妒) people who can say that they are writers, bookkeepers and doctors. All these jobs speak for themselves. I really do make a living by ##, and a good one, too. I can laugh like a king or like a schoolboy. It is a skill that I have learned, like the skill of mending shoes. Whenever and however laughter is needed - I am asked to do ##. I laugh like a bus driver or a shopkeeper. I laugh sadly, kindly and happily. I need ##point out that a job of this kind is tiring. I spend most evenings in nightclubs. My job is to laugh during the weaker part of the show. My loud, hearty laugher must be timed carefully. It must not come too soon,##neither must it be too late. I go through life quietly. I can copy the laughter of others. I can laugh in many different ways. But I\'m not sure that I have ever heard the sound of##own laugh. A. hardly B.my C. but D.it E. laughing
答案:


23.As is known to all, China is the largest developing country in the world.##

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