高中英語unit4astronomythescienceofthestarsreading2課件新人教版必修3(編輯修改稿)
2024-12-24 07:58 本頁面
【文章內(nèi)容簡介】 Read the passage quickly to answer the following questions. carbon, nitrogen, water vapour, and other gases 2. what is fundamental to the development of life? it allowed the earth to dissolve harmful gases and acids into the oceans and seas. 1. What is the original earth’s atmosphere made up of? 3. Which kind of lifebeing first appeared on the earth, plants or animals? Why? At first, small plants began to appear on the surface of the water, and they produce oxygen, which encouraged the later development of early shellfish and all sorts of fish. Can you fill in the blanks? 2 3 4 5 6 7 8 9 10
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