How does noctilucent cloud come into being?What does this special cloud do at a high altitude of the air?
a huge build up of methane gas in the atmosphere, which carries more water vapor into the upper atmosphere, where it condenses at much higher altitudes to form more clouds that the sun's rays still strike long after sunset has brought the beginning of night to the surface far beneath them.they shimmer abover us with a translucent whiteness
举一反三
- 中国大学MOOC: How does cloud brocade get its name?
- Which of the following does not belong to cloud computing or cloud<br/>storage() A: Ali Cloud B: Baidu Cloud C: Vipshop D: iCloud
- How does cloud brocade get its name? A: It’s mainly white. B: It’s usually as colorful as the rosy clouds in the evening. C: The patterns on the cloud brocade are mostly related with the sky. D: It’s originated in Nanjing.
- Please! _______ quiet a moment! A: Does be B: Do be C: Do being D: Does being
- Which of the following titles is a proper one? A: What should we do to prevent air pollution? B: An Exploration into the Measures to Prevent Air Pollution C: How does air pollution happen? D: Computer Retrieval
内容
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How long does Christmas last? What do people do on Christmas Day?
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9. What does the author think are the special qualities necessary for leading a life the way they do? _________
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57（） A: How old are they B: What does he do C: and brothers D: but no brothers E: What do they do F: is studying G: Does she work H: She is a lawyer
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-_____-Once a month. A: How many magazines come out? B: How long does this magazine come out? C: How soon will this magazine come out? D: How often does this magazine come out?
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How much does the bill come to?