关于一年四季的英语作文
题目
关于一年四季的英语作文
答案
第一篇:一年四季(The Four seasons) A year has four seasons.Every season has three months.The weather of one season is different from that of any other.The life cycles of plants are controlled by the s...
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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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