写春天的英语50字文章
题目
写春天的英语50字文章
答案
In spring, the ice on the brook has been melted, the small fish swim in water, the trees sprouted, the flowers are in blossom, grass green. Very beautiful in spring! In winter, leaves have all already...
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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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