what i did last sunday 这个作文怎么写
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what i did last sunday 这个作文怎么写
答案
last sunday I got up quickly and made a plan for today.One,two,three and so on,that was what I should do.Looking at the full piece of paper,I smiled.What a busy day it would be!I didn't listen to the ...
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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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