Is this your eraser?NO,it is not.Ithink{ }
题目
Is this your eraser?NO,it is not.Ithink{ }
1;it his eraser 2;its his eraser 3;it is his eraser改选哪一个
答案
选三
答案一缺少谓语
答案二的 its是意思 它的 ;如改成 it's 就 可以
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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