learning english英文对话不少于20句
题目
learning english英文对话不少于20句
答案
A:Hey,Bob.B:Hi,Tom.What's up?A:I haven't seen you those days,how's things going?B:I'm busy in learning English.A:So,you are enjoying learning English,right?I don't like English at all.B:Why?It's so in...
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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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