Câu hỏi:
21/03/2020 730Read 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.
The word “this” in paragraph 1 refers to ___________.
Đáp án chính xác
Câu hỏi trong đề:
Tổng hợp đề luyện thi Đại Học môn Tiếng Anh có lời giải !!
Sách mới 2k7: Tổng ôn Toán, Lí, Hóa, Văn, Sử, Địa…. kỳ thi tốt nghiệp THPT Quốc gia 2025, đánh giá năng lực (chỉ từ 110k).
Quảng cáo
Trả lời:
Giải bởi Vietjack
Chọn D.
Đáp án D
“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.” (Một học thuyết thường liên quan đến một mô hình tưởng tượng mà giúp các nhà khoa học hình dung ra cách một sự kiện được tạo ra. Một ví dụ tốt về điều này được tìm thấy trong lý thuyết động học phân tử, trong đó các loại khí được hình dung như đang được tạo nên từ nhiều hạt nhỏ đang chuyến động liên tục.)
Do đó, “this” = an imaginary model
Nhà sách VIETJACK:
CÂU HỎI HOT CÙNG CHỦ ĐỀ
Câu 1:
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
You are old enough to take _____ for what you have done.
Xem đáp án »
11/01/2022
106,231
Câu 2:
Mark the letter A, B, C or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.
Laura practised playing the instrument a lot. She could hardly improve her performance.
Xem đáp án »
21/03/2020
28,825
Câu 3:
Mark the letter A, B, C or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.
We didn’t want to swim in the river. It looked very dirty.
Xem đáp án »
21/03/2020
27,248
Câu 4:
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
_____cheat on the exam have to leave the room.
Xem đáp án »
21/03/2020
19,237
Câu 5:
Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.
However (A) small, my apartment (B) is well designed (C) and nicely decorated (D).
Xem đáp án »
21/03/2020
18,316
Câu 6:
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
The class will start at 8:00 a.m. on the ______, so don’t be late!
Xem đáp án »
21/03/2020
13,713
Câu 7:
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
After a meal in a restaurant, you ask the waiter for the ________.
Xem đáp án »
21/03/2020
13,509
về câu hỏi!