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： B

　　(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： C

　　(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： A

　　(4)、The author quotes the case of Albert Einstein to illustrate __________.

　　A：that measurements are keys to success in science

　　B：that accuracy of mathematics

　　C：that investigations are important in science

　　D：that the mathematical calculations may test his investigations

　　答案： C

　　(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