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题型:单词拼写(语篇) 题类:常考题 难易度:普通

牛津译林版九年级下册Unit4Life on Mars单元测试

根据文意及首字母提示补全短文。

    Have you ever thought of living on Mars? Our Earth is becoming more and more c. And at the same time there's terrible p here. If we move to Mars, things will probably change. However, it may be d for people to have a conversation there, because sound doesn't travel very f on Mars. The low pressure(气压) makes it so. For example, as by a human scream on Earth can travel a little over a kilometre. But on Mars, the sound from that same scream will only move 15 metres at m. Besides, the atmosphere on Mars is also much t than that on Earth. On Earth, our atmosphere is about 3 km t, while it is very thin on Mars. Also Earth has a much higher t than Mars. while it is very thin on Marsso, are you r to go to Mars?

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