李明的变化英语作文 由坏到好
题目
李明的变化英语作文 由坏到好
答案
Li Ming has changed a lot these years.He used to be late for school but now he isn't.He always arrives at s choo in time.He used to have a fight with his classmates but now he doesn't.He gets on well
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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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