A long time ago people thought that sun went round the earth...
题目
A long time ago people thought that sun went round the earth...
A long time ago people thought that the sun went round the earth.In some
countries people even said that the sun was a god(神).They thought the god
drove across the sky each day on a golden horse.Now we know the earth goes
round the sun.It takes the earth a year to go all way round the sun.Today
men even know how far it is for the earth to go round the sun.They tell us
that the earth travels over a thousand miles a minute on its journey round the
sun.$
The sun is really a star.It is much bigger than the earth and it is very
hot.Some people have been to the moon but we know that no one can ever go to
the sun.It is far too hot for people to live anywhere near it.The sun is three
hundred thousand times heavier than the earth and more than million times larger.
答案
很久以前 人们以为太阳绕着地球转、在一些国家人们甚至说太阳是个神、他们以为太阳神每天骑着一个金色的马穿过天空现在我们知道 地球围绕太阳转、地球绕太阳转一周花费一年时间、今天 人们甚至知道地球绕太阳一周有...
举一反三
已知函数f(x)=x,g(x)=alnx,a∈R.若曲线y=f(x)与曲线y=g(x)相交,且在交点处有相同的切线,求a的值和该切线方程.
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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