simple question
题目
simple question
They_______(not go) to Beijing.They won't leave until 6o'clock tomorrow moring.
想继续问一题简单的问题:Where_____you______(be)?I called you,but there was no reply.
答案
aren't going
were being
举一反三
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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