logo fqa gpt

banner fqa app
Tải APP FQA Hỏi & đáp bài tập
Tải ngay
Vietallain

20/12/2023

Part 3: Read the text below and choose the best answer to each question. The air above our head is becoming cleaner. A breath of fresh air has been running right round the planet for the past five years. The planet is apparently purging itself of pollution. Paul Novell of the University of Colorado, the co-author of a report on this phenomenon says, “It seems as if the planet’s own cleansing service has suddenly got a new lease of life. Suddenly, there are a lot of changes going on up there.” Estimates of the death toll from urban smog have been steadily rising, so the new cleaner trend could have significant consequences for life expectancy in cities as well as for the planet itself. The sudden and unexpected reversal of several decades of worsening pollution extends from the air in city streets to the remotest mid-Pacific Ocean and Antarctica. Among the pollutants which have begun to disappear from the atmosphere are carbon monoxide, from car exhausts and burning rain forests, and methane from the guts of cattle, paddy fields, and gas fields. Even carbon dioxide, the main gas behind global warming, has fallen slightly. There are two theories about why pollution is disappearing. First, that there is less pollution to start with due to laws to cut down urban smog and acid rain starting to have a global impact. Second, that the planet may be becoming more efficient at cleaning up. The main planetary clean-up agent ¡is a chemical called hydroxyl. It is present throughout the atmosphere in tiny quantities and removes most pollutants from the air by oxidizing them. The amount of hydroxyl in the air had fallen by a quarter in the 1980s. Now, it may be reviving for two reasons: ironically, because the ozone hole has expanded, letting in more ultraviolet radiation into the lower atmosphere, where it manufactures hydroxyl. Then the stricter controls on vehicle exhausts in America and Europe may have cut global carbon monoxide emissions, thereby allowing more hydroxyl to clean up other pollutants. 1. What is the main topic of the passage? A. The decreasing pollution of the atmosphere. B. The changing pollutants in the atmosphere. C. Hydroxyl’s influence on the atmosphere. D. The oxygenation of the atmosphere. 2. The word ‘purging’ is closest in meaning to _______. A. destroying B. refining C. filtering D. ridding 3. According to the passage, life expectancy partly depends on people having _______. A. access to details about atmospheric pollution. B. recommendations from university research C. improvement in atmospheric conditions D. changes in their lifestyle 4. The word ‘toll’ could best be replaced by________. A. costs B. count C. damage D. loss 5. What does the author suggest is the main cause of pollution reduction? A. Less impact from burning forests B. A smaller number of cars C. A curtailment of chemicals D. Fewer cattle and gas fields 6.The word ‘it’ refers to ________. A. urban smog B. a clean-up agent C. acid rain D. the ozone hole 7. It can be inferred from the passage that the new cleaner trend is _______. A. inexplicable B. confusing C. surprising D. predictable 8. Based on information in the passage, all of the following information referring to hydroxyl is true EXCEPT. A. the reduction in the ozone layer is beneficial to hydroxyl. B. oxidization of pollutants is carried out by hydroxyl. C. there is difficulty in destroying carbon dioxide by hydroxyl. D. ultraviolet radiation increases production of hydroxyl. 9. The word ‘reviving’ is closest in meaning to A. reappearing B. refreshing C. reproducing D. repeating 10. The passage supports which of the following conclusions? A. The decrease of methane has enabled ultraviolet radiation to enter the atmosphere. B. An expansion in hydroxyl has enlarged the ozone hole. C. The reduction in carbon dioxide has produced a cleaner atmosphere. D. The beneficial effect of hydroxyl has aided the cleaning process.
Trả lời câu hỏi của Vietallain
right
Viết câu trả lời

Làm sao để có câu trả lời hay nhất?

  • Luôn có GIẢI THÍCH các bước giải
  • Không copy câu trả lời của Timi
  • Không sao chép trên mạng
  • Không spam câu trả lời để nhận điểm
  • Spam sẽ bị khóa tài khoản
CÂU TRẢ LỜI
Timi

20/12/2023

Trợ lý học tập AI - Câu trả lời này chỉ mang tính tham khảo
1. A. The decreasing pollution of the atmosphere. 2. D. ridding 3. C. improvement in atmospheric conditions 4. D. loss 5. C. A curtailment of chemicals 6. D. the ozone hole 7. C. surprising 8. C. there is difficulty in destroying carbon dioxide by hydroxyl. 9. A. reappearing 10. D. The beneficial effect of hydroxyl has aided the cleaning process.
batmannn

20/12/2023

Câu trả lời uy tín

1. A. The decreasing pollution of the atmosphere.
2. D. ridding
3. C. improvement in atmospheric conditions
4. D. loss
5. C. A curtailment of chemicals
6. A
7. C. surprising
8. C. there is difficulty in destroying carbon dioxide by hydroxyl.
9. A. reappearing
10. D. The beneficial effect of hydroxyl has aided the cleaning process.

Nếu bạn muốn hỏi bài tập

Các câu hỏi của bạn luôn được giải đáp dưới 10 phút

right Đặt câu hỏi ngay
Điện thoại: 1900636019 Email: info@fqa.vn

LIÊN KẾT

FQA.vn Nền tảng kết nối cộng đồng hỗ trợ giải bài tập học sinh trong khối K12. Sản phẩm được phát triển bởi CÔNG TY TNHH CÔNG NGHỆ GIA ĐÌNH (FTECH CO., LTD)

Copyright © 2025 fqa.vn All Rights Reserved