作业帮求外研版初二上Module3Unit2的课文
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求外研版初二上Module3Unit2的课文
我要用那篇课文，就是讲宇宙的那篇：Scientists think that there has been life...
快！
我要用那篇课文，就是讲宇宙的那篇：Scientists think that there has been life...
快！
Scientists think that there has been life on Earth for millions of years.However,we haven't found life on other plants yet.Why not？
The Earth is a plant and it goes around the Sun.None of them has an enviorment with air,so people and things cannot grow.The Sun and its plants are called the solar system.The solar system is a small part of our galaxy.
The stars we see at night are the suns in other solar systems.There are more than 200 billion stars in our galaxy,called the Miky way,and our Sun is only one of them.
But scientists have discovered many other galaxies in the universe.They area long way away and there light has travelled for many years to reach us.It is hard to understand how large the universe is.
Scientists have lots of spacecraft to look at other plants in our solar system,and some spacecraft have gone beyond the solar system.However,no one has discovered any life in space yet.
But why has no one from other plants sent us a message?Have they tried to send imformation to us?With so many stars in the universe,are we alone,or is therelife out there in space?We don't konw...yet.
The Earth is a plant and it goes around the Sun.None of them has an enviorment with air,so people and things cannot grow.The Sun and its plants are called the solar system.The solar system is a small part of our galaxy.
The stars we see at night are the suns in other solar systems.There are more than 200 billion stars in our galaxy,called the Miky way,and our Sun is only one of them.
But scientists have discovered many other galaxies in the universe.They area long way away and there light has travelled for many years to reach us.It is hard to understand how large the universe is.
Scientists have lots of spacecraft to look at other plants in our solar system,and some spacecraft have gone beyond the solar system.However,no one has discovered any life in space yet.
But why has no one from other plants sent us a message?Have they tried to send imformation to us?With so many stars in the universe,are we alone,or is therelife out there in space?We don't konw...yet.