These are photos of my families.Look at them.
题目
These are photos of my families.Look at them.
The girl in red is between her fathers and mothers.
答案
第一句应改为：there are photos of my families.Look at them.
第二：the girl in red is between her father and mother.between是指两者之间!
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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