同义句He has been learning English for six years
题目
同义句He has been learning English for six years
改为时间在前,事在后的形式.谢
答案
It is six years since he learned English.
He has been learning English since six years ago.
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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