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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 makes 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(调查),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 answers 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 his 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.
51.What makes a scientist according to the passage?
A. The tools he uses. B. His ways of learning.
C. The way he uses his tools. D. The various tools he use
52.“The scientist, however, goes one step further,” the author says this to show 。
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.
53. A sound scientific theory should be one that .
A. does not only work under one set of conditions at one time, but also works under the same conditions at other times
B. leaves no room for improvement
C. does not allow any change even under different conditions
D. can be used for many purposes
54. What is the main idea of the passage?
Scientists are different from ordinary people.
The theory of relativity.
Exactness is the core（核心）of science.
Exactness and way of using tools are the keys to the making of a scientist.
查看习题详情和答案>>—Does he know how to work out the problem ?
—Yes , he has a good idea to solve it .
A. caught up with B．kept up with C．come up with D．put up with
查看习题详情和答案>>单词拼写（共10小题；每小题1分， 满分10分）
81. He had an a___________ for life and enjoyed exploring the workings of objects and animals.
82. The doctor is skilled at treating heart trouble and never accepts any gift from his patients , so he has a very good r_________.
83. His brother tried hard to sell and d__________ his paintings to buyers, but he was never able to negotiate a successful sale.
84. She won a s __________ to study at Beijing University.
85. When first at the party, I made the a ____________ of several novelists who gave me their fortune.
86. ZhangYimou has made many _________(高质量的) films, which are loved by many people.
87. The bringing together of this group of people from many countries, the music, and the setting are clearly the key _______________(组成部分) of this amazing production.
88.It is hard to ________(区分) between the student and the other, for they are twins.
89.You shouldn’t have made an ___________(约定) with her that you couldn’t keep.
90.As a member of the club, it is a real _____________(特权) for me to be admitted
查看习题详情和答案>>He is a real turtle（海龟）.
Someone who always moves very slowly.
She is such a sheep.
A follower; someone who can’t think for him or herself.
He’s being an ostrich（鸵鸟）.
Someone who hides his/her head in the sand and refuses to face problems or reality.
He’s a lamb.
A gentle, patient, understanding person. Nice and considerate.
What a crab（蟹） he is!
A grouchy（发牢骚的） person; someone who is often angry and in a bad mood.
1.In which of the following situations are the people acting like sheep?
A. A teenager tells a small child to stop bothering an animal.
B. A young man is driving fast because all his friends do.
C. Someone runs for monitor of the senior class in the school.
D. People are walking and singing together along the road.
2.If a person is like a turtle, which of these is most likely to be a problem to him or her?
A. Keeping the house clean. B. Learning a new language.
C. Getting to school on time. D. Saving money for future use.
3.Buddy hates to wake up on Monday morning. He doesn’t speak to his wife or children, and he often shouts at the other drivers on his way to work. Everybody stays out of his way at least until noon time. After that he’s all right. Buddy’s boss says, “ Buddy is a good guy, but on Monday morning, he’s an absolute _________.”
A. crab B. lamb C. turtle D. ostrich
4.Jerry has not been well for weeks. He knows he has a problem but he is afraid to see a doctor .If he is sick, he doesn’t want to know about it. His wife says, “ Jerry, don’t be a(n) __________. Go to the doctor. She can help you get of your illness.
A. crab B. lamb C. sheep D. ostrich
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