牛津深圳版英語七上unit3theearthmorepractice-文庫吧資料
2024-12-09 00:37本頁面
【正文】 地球的大氣， 主要由 78%的氮氣、 21%的氧氣、 %的稀有氣體， %的二氧化碳， %的其它氣體和雜質(zhì)、 雜質(zhì)氣體共同組成 , 密度為 。 Answer two questions before reading: does Air look like? is Air useful for? No colour, no smell, no taste. We need to breathe. Read and fill in the blanks. 1. Air has no _____ and no _____. When the wind blows, you feel the _____ on your face. 2. A kite or a plane _________ to stay in the sky. 3. A balloon uses ______to rise in the air and ______ people up.
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