听力原文： Governors, lawyers and business leaders have to deal with scientists; and every educated person finds his views influenced by science. Yet our science teaching of nonscientists, in school and college, has built up mistaken ideas, dislikes, and the common boast, "I never did understand science." Even those students who arrive at college with plans to become scientists usually bring a mistaken picture of science: some have a collection of unorganized facts about science, and some regard the study of science as a game which involves getting, the right answer.
The first of these attitudes seems to come from a kind of course which provides various kinds of information; the second, from a training course on how to pass examinations that do not ask about the student's understanding but simply require him to put the numbers in the fight formulas. Neither type of course (in school or college) seems to give students an understanding of science as we find it among scientists. Neither shows students how real scientists work and think, how the facts are gathered, how discoveries are made, and what they mean. Young people need good teaching of science, not so much a great wealth of knowledge as a healthy understanding of the nature of science. They need an understanding of knowledge leading to a sympathy with science and a keen awareness of the way scientists work. Given these, it is easy to encourage later reading and leaning.
Questions:
16. What is one of the reasons that causes mistaken ideas of science？
17.What if students have a healthy understanding knowledge of science？
18.What is a good course of science like？
19.What is the main reason that people such as governors, lawyers and business leaders deal with scientists？
20.What is the main idea of the talk？
(36)

A mistaken picture in students' mind.
B. The unscientific way of teaching of science.
C. The fact that students fail to see the influence of science.
D. The fact that students have a collection of unrelated facts about science.