What is your favourite holiday and why?一分钟英语演讲
题目
What is your favourite holiday and why?一分钟英语演讲
三十分钟内弄出来!好的加悬赏,不好的X.
答案
I really love the summer holiday, which I have lost for ten years. Why? after such a long time of fighting for material life, I feel a big lack in mind. That's the difference between our chinese and t...
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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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