my pen pal and i
题目
my pen pal and i
50词左右
答案
My pen pal and I I've got a pen pal on the Internet,He's from Finland,Leon is his name.He is a 15-year-old boy who likes to play football.we write a lot to each other.We almost share the same interest...
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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