英语作文my family 50词左右
题目
英语作文my family 50词左右
答案
I have a small but sweet family. There are my father, my mother and I in the family. We love each other and help each other. No matter when one of us faces problem, the others are always ready to giv...
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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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