you don‘t have to describe her.i (have met/had met/met) her several times.
题目
you don‘t have to describe her.i (have met/had met/met) her several times.
答案
have met
你不用介绍她了,我已经见过她好几次了
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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