初中英语作文the happiest day of my life 70字
题目
初中英语作文the happiest day of my life 70字
答案
I am fifteen years old today ,I'm very happy today .but it is not the reason indeed .when I went to school this morning ,I helped an oldwoman passing road .and then ,when I got to class ,my teacher to...
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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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