my vacation 过去式70字左右
题目
my vacation 过去式70字左右
答案
Last summer, I had a great vacation. I went to Hawaii. I likes fruit, and in Hawaii, the bananas and oranges were great. The weather was very good, too. On the first day, I went to the beach and visit...
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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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