After working for a long time,.但为什么是Having working for a long time.
题目
After working for a long time,.但为什么是Having working for a long time.
答案
没有Having working for a long time.
只有以下两个:
Having worked for a long time.
Having been working for a long time.
这种用动名词开头的句子很多的.
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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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