it was very difficult for him to work out the problem改为同义句
题目
it was very difficult for him to work out the problem改为同义句
it was very difficult for him to work out the problem 改为同义句
he likes history.i like history too. 合并为一句
He likes ___ same subject __ me
答案
It's a difficulty for him to ...
Both he and i like history.
the :as
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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