my dream
题目
my dream
以my dream 写一篇100字的英语作文
答案
Everyone has a dream.Now I want to say something about my dream.What is my dream?I often ask myself.In my mind,everyone shall have his own dream.I think that having a dream means that we have an idea,...
举一反三
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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