参观广州英语作文100字左右初一水平
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参观广州英语作文100字左右初一水平
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Today I visit GuangZhou City.It is a wonderful day!GuangZhou is a very beautiful city.The street is very clean and the people here are very friendly.There are lots of delicious food in the shop.These ...
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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