how do make fiends 求一篇英语作文 不少于80词.
题目
how do make fiends 求一篇英语作文 不少于80词.
答案
Everyone needs friends.A friend can give us help and share our difficulties and happiness.But how can we make friends?First,to make friends,you must be friendly to others.Smile at others and you are s...
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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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