what do you often do in spring festival?作文
题目
what do you often do in spring festival?作文
答案
Spring Festival is the most important festival in China .It’s to celebrate the lunar calendar ‘s new year .In the evening before the Spring Festival ,families get together and have a big meal .In ma...
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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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