六年级五十词英语小短文
题目
六年级五十词英语小短文
答案
Dear lisa, Thank you for you letter.I hear your throat hurt very sad. I think you should drink more water. Eat a little and herbal medicine treatment or throat. You should drink some water. This is...
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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