英语作文:The sun ,the moon and the earth
题目
英语作文:The sun ,the moon and the earth
答案
The Moon Festival is on the 15th day of the 8th lunar month.It is one of the traditional Chinese Festivals.On that day,the Chinese usually have a special family dinner.Each member of the family,even f...
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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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