My watch is broken again.（同义句）My watch _____ ______again.填什么空里
题目
My watch is broken again.（同义句）My watch _____ ______again.填什么空里
When he sees his father ,he is very happy.（同义句）He is very happy ______ ______ his father.
到那儿要花费我多长时间？________________ will it take me ____________?
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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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