Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions from 30 to 34.
In Science, a theory is a reasonable explanation of observed events that are related. A theory often involves an imaginary model that helps scientists picture the way an observed event could be produced. A good example of this is found in the kinetic molecular theory, in which gases are pictured as being made up of many small particles that are in constant motion.
A useful theory, in addition to explaining past observation, helps to predict events that have not as yet been observed. After a theory has been publicized, scientists design experiments to test the theory. If observations confirm the scientists’ predictions, the theory is supported. If observations do not confirm the predictions, the scientists must search further. There may be a fault in the experiment, or the theory may have to be revised or rejected.
Science involves imagination and Creative thinking as well as collecting information and performing experiments. Facts by themselves are not Science. As the mathematician Jules Henri Poincare said: “Science is built with facts just as a house is built with bricks. But a collection of facts cannot be called Science any more than a pile of bricks can be called a house.”
Most scientists start an investigation by finding out what other scientists have learned about a particular problem. After known facts have been gathered, the scientist comes to the part of the investigation that requires considerable imagination. Possible Solutions to the problem are formulated. These possible Solutions are called hypotheses. In a way, any hypothesis is a leap into the unknown. It extends the scientist’s thinking beyond the known facts. The scientist plans experiments, performs calculations, and makes observations to test hypotheses. For without hypotheses, further investigation lacks purpose and direction. When hypotheses are confirmed, they are incorporated into theories.
In the fourth paragraph, the author implies that imagination is most important to scientists when they _______.
A. formulate possible solutions to a problem
B. evaluate previous work on a problem
C. close an investigation
D. gather known facts
Chọn A.
Đáp án A
Trong đoạn văn 4, tác giả ngụ ý rằng trí tưởng tượng quan trọng nhất với các nhà khoa học khi họ...
A. xây dựng những giải pháp có thể cho một vấn đề
B. đánh giá việc làm trước đó cho một vấn đề
C. kết thúc việc điều tra
D. thu thập các sự kiện được biết đến
Most scientists start an investigation by finding out what other scientists have learned about a particular problem. After known facts have been gathered, the scientist comes to the part of the investigation that requires considerable imagination. Possible Solutions to the problem are formulated. (Hầu hết các nhà khoa học bắt đầu một cuộc điều tra bằng việc tìm ra những điều mà các nhà khoa học khác đã nghiên cứu về một vấn đề riêng biệt. Sau khi các sự kiện được biết đã thu thập được thì nhà khoa học đó tiến đến một phần của cuộc điều tra mà đòi hỏi trí tưởng tượng đáng kể. Các giải pháp có thể cho vấn đề được xây dựng.)