Have you every -- playing in front of thousands of people at a concert中间应填什么
题目
Have you every -- playing in front of thousands of people at a concert中间应填什么
答案
Have you every been playing in front of thousands of people at a concert?
你是否曾在音乐厅,面对成千的观众进行表演呢?
填 been.
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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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