阅读理解。

     What makes a person 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 the tools that make

difference. You will probably agree that knowing how to use a power is important to a carpenter. You will

probably agree that knowing how to investigate and how to discover information is important to anyone. The

scientist goes one step further than that; 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. 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 change the scientist observes in a demonstration must be explained by the change 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.

1. What's the passage mainly about? [ ]

A. Scientists are ordinary people

B. The theory of relativity

C. What makes a scientist

D. What's important to a scientist

2. Which won't the author agree to?[ ]

A. Knowing how to use a power is important to a carpenter

B. A scientist must know how to investigate and how to discover information

C. A scientist must be sure that he has an exact and reasonable answer to his questions

D. A scientist must be a good runner, because he must go a step further than others

3. Why is investigation important?[ ]

A. The scientist's knowledge must be exact

B. He must be as nearly right as the conditions permit

C. What works under one set of conditions at one time must work under the same conditions at other times

D. If the conditions are different, any changes the scientist observes in a demonstration must be explained by

     the changes in the conditions

4. What does "investigate" mean in the passage? [ ]

A. Put some money

B. Make a careful study

C. Develop

D. Find information

5. What's correct about relativity? [ ]

A. Relativity is a theory that needs developing

B. Relativity is the accuracy of mathematics

C. Relativity is developed through investigation and tested through mathematics

D. Relativity is a theory developed through mathematics and tested through investigation