my vacation写英语作文
题目
my vacation写英语作文
ING的形式 要求配中文.哪位大大给写下
答案
My Vacation
My vacation was very fun.I went to World Expo.There were many interesting building about China,Amrica and France.The Chinese building is tall.And I enjoyed beautiful things.I thought my vacation was very substantial.
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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