Has your manager reterned form his business trip to japan
题目
Has your manager reterned form his business trip to japan
Yes ,but he( )in the company for only two days before he was asked to go to a conference in Beijing.
A.was B.has been C.will D.would be
选哪个,why!
答案
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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