7个最高级的英文句子
题目
7个最高级的英文句子
7个!
答案
we are the best friends .
China is the largest country in the world .
my mother is the most beautiful in my heart.
do you know who is the most clever boy in our class
I like singing best,what about you
Mary is the tallest girl in her class.
Shanghai is one of the biggest cities in China.
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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