以my neighbourhood的作文.
题目
以my neighbourhood的作文.
答案
.There is a lovely girl at my next door ,we are neighbors and good friends.She is a middle school student. She has big eyes, a small mouth, a small nose and a round face. She is tall and thin. She li...
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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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