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What makes a person a scientist? Does he have ways or tools of learning that ...

admin2020-12-24  50
问题 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.
选项 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D
解析这是一道主旨题。本题询问文章的中心思想。文章的第一句话表明作者是要告诉读者一个人是怎样成为一个科学家的。之后，第一段主要谈到作为一个科学家注重的是使用工具的方式而不是何种工具，第二段主要谈到科学家的理论必须在任何情况下都是正确的。选项A“相对论”，它只是文章中列举的一个例子，因此排除。选项B“准确性是科学的精髓”，这句话是文章第二段的主旨句，故排除。选项C“科学家和普通人不同”，这不是文章所探讨的核心问题，故排除。选项D“准确性和使用工具的方式是成就一位科学家的关键”，这句话充分的概括了文章的两段内容，因此答案选择D。
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