作文题目为why do i keep a pet?求急!
题目
作文题目为why do i keep a pet?求急!
答案
There're some reasons for keeping a pet:
1,help you get rid of loneliness.
2,you can develop your sense of responsibility by keeping a pet.
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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