人教版高中英语必修三unit4astronomythescienceofthestarsreading课件内容摘要：
ife developed in water next? green plants began to grow on land insects appeared about the life on land? amphibians on land and in the water forests 4. What life developed next on land? reptiles appeared dinosaur developed life developed after forests appeared? mammals on land life developed after dinosaurs? small clever animals 7. What life developed after mammals? • What are they doing on the earth? Because they are putting too much carbon dioxide into the atmosphere, which prevents heat from escaping from the earth into space. The earth may bee too hot to live on . 1. Insects and amphibians appeared. 3. The earth became a solid ball. 5. Reptiles app。阅读剩余 0%
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