I am Tim.I live in a big city with my family.Each summer I go to my
题目
I am Tim.I live in a big city with my family.Each summer I go to my
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答案
I have a happy family.My family have five poeple:grandpa,grandma,father,mother,and me.My grandparents live in countryside.They have six rooms.The room is big.There are two apple in the ground.They have sixteen goats and three cows.The goat is white.The cow is yellow.They are healthy.
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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