All the students were here yesterday.的同义句
题目
All the students were here yesterday.的同义句
答案
All of the students were here yesterday.
The students were all here yesterday.
Each of the students was here yesterday.
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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