we were excited this morning There were 5girls in the classroom yesterday
题目
we were excited this morning There were 5girls in the classroom yesterday
there were apples on the tree last week
my brother was 3years old that year
i was only 31kg last year
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这些事问句吗?不太明白你的问题.
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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