What did you and your friends do _____ different holidays?中间填什么介词
题目
What did you and your friends do _____ different holidays?中间填什么介词
答案
What did you and your friends do _____ different holidays?应该填 during the , 或者 on the 也可以.What did you and your friends do during the different holidays?再艰难的假期 你和你的朋友会做什么?...
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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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