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    1、贵州2024新高考答案
    2、2024贵州高考语文新教材
    3、贵州省2024年高三四月适应性考试
    4、贵州市2024年高三适应性考试(一)语文
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    10、2024年贵州高考试卷语文答案

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A.Listening to his new CD.
2.答选择题时，选出何小题答茶后，用铅笔把答题卜对应题日的答茶标号涂黑。如需女动，用
B.Doing his homework.
橡皮擦干净后，可选涂其它答标号。答非选择题时，将答采写在答题卡上。写在木试卷
C.Practicing pronunciation.
装
上无效


Earth's ozone (O3) layer (臭氧层), the protective shield (防护盾) in the atmosphere about 15 to 30 kilometers above the Earth's surface, is improving and is expected to return to its normal state by the middle of the 21st century.
Over the past thirty years, humans have successfully reduced the use of many chemicals harmful to the ozone layer. Ozone in the stratosphere (平流层) takes in harmful UV rays from the sun, especially UVB rays. These rays are connected to skin cancer, eye damage, and harm to plants and sea life. This ozone is often called "good" ozone, unlike "bad" ozone near the ground, which causes air pollution and breathing diseases.
Ozone is an active gas made up of three oxygen atoms (氧原子). Its amount naturally changes based on the season and location, but it is almost the same since 1957. However, studies in the 1970s and 1980s showed that the ozone layer was in danger.
In 1974, scientists Mario Molina and Sherwood Rowland discovered that CFCs (chemicals widely used in spray cans and fridges) could damage the ozone layer. When CFCs reach the Stratosphere, UV rays break them down into chlorine (氯气), a poisonous (有毒的) greenish gas, which can destroy more than 100, 000 ozone molecules (分子). This process happens much faster than the ozone can fix itself.
In 1985, English scientists found a large hole in the ozone layer over Antarctica (南极洲),which was later connected to CFCs. This hole reappears every year in the spring months (August to October). The ozone layer is also weakening at the North Pole, causing rapid warming in the Arctic (北冰洋), as CFCs are even stronger greenhouse gases than CO2.
Good news came in 2023 when scientists reported that the ozone layer is returning to its normal state. It is expected to return to its 1980 condition by 2040. Ozone holes over the Arctic and Antarctica will close up by 2045 and 2066.
This progress is thanks to the Montreal Protocol, an international agreement signed in 1987 by 46 countries to stop using harmful chemicals. Today, nearly 200 countries have joined, making it a big success in protecting the Earth's atmosphere.


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1、[贵州天之王教育]2025年贵州新高考高端精品冲刺卷(四)4 试题


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