Câu hỏi:
04/04/2020 1,023Read 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 questions.
Today I’d like to begin a discussion on the problem of the heating up the earth. First, we’ll touch on the relationship between fluorocarbons and the ozone layer. You probably remember that the ozone layer is the protective shield around the earth. It is important to all life, because it filters out harmful ultraviolet light from the sun. Ozone itself, a form of oxygen, is regularly made by the action of the sun in the upper atmosphere. It is also regularly destroyed by natural chemical processes.
The problem now is that too much of the ozone layer is being destroyed. Scientists suspect that certain chemicals, such as fluorocarbons, are contributing to the depletion of the ozone layer. And how do we use fluorocarbons? The most common uses are in spray cans and cooling systems. The chemical pollution from these fluorocarbons can account for some of the ozone losses that have been reported. There are, however, new studies linking the sun itself to the depletion of the ozone layer. We’ll go into that new study more next time.
What is the most important purpose of the ozone layer?
Đáp án chính xác
Câu hỏi trong đề:
Đề thi thử THPT quốc gia năm 2019 môn tiếng anh chuẩn cấu trúc !!
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
Đáp án B
Vai trò quan trọng nhất của tầng ozone là?
A. Bảo vệ mặt trời.
B. Bảo vệ trái đất.
C. Phá huỷ chất hoá học.
D. Cung cấp floruacacbon
“the ozone layer is the protective shield around the earth.” (tầng ozone là lớp chắn bảo vệ xung quanh trái đất.)
Như vậy vai trò của nó là bảo vệ trái đất.
Nhà sách VIETJACK:
CÂU HỎI HOT CÙNG CHỦ ĐỀ
Câu 1:
Tom and Linda are talking about jobs they would like to choose.
- Tom: “I think working as a doctor is a challenging job.”
- Linda: “________.”
Xem đáp án »
04/04/2020
47,432
Câu 2:
__________, the balcony chairs will be ruined in this weather.
Xem đáp án »
04/04/2020
21,361
Câu 4:
Mark the letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.
The movie bears little resemblance to the original novel.
Xem đáp án »
04/04/2020
15,440
Câu 5:
Mark the letter A, B, C, D on your answer sheet to show the underlined part that needs correction.
The audience was enjoying every minute of the performance.
Xem đáp án »
04/04/2020
14,704
Câu 6:
I know you didn’t want to upset me but I’d sooner you ________ the whole truth yesterday.
Xem đáp án »
04/04/2020
13,448
Câu 7:
A fire in the ________ building could be a problem for firefighters.
Xem đáp án »
04/04/2020
12,439
về câu hỏi!