her coat is different from mine.改为同义句.i paid twenty dollars for the book.改为同义句.this lady is friendly
题目
her coat is different from mine.改为同义句.i paid twenty dollars for the book.改为同义句.this lady is friendly.and she is beautiful.合并为一句.are you a boy or a girl?could you tell me?合并为一句 it s important to know how to ask for help politely改为同义句
答案
her coat is not the same as mine.the book cost me twenty dollars.the lady is friendly and beautiful.could you tell me you are a boy or a girl?to ask for help politely is important to know
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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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