圣诞英语作文（小学六年级的）
题目
圣诞英语作文（小学六年级的）
N急!
答案
It was Christmas yesterday.I and my family were in my grandparents' house.There were so many presents under the Christmas tree.We opened our presents.Everybody was very excited.The new watch was for grandpa,it was from Mum.The teapot was for grandma,it was from grandpa.The volley was for Dad,it was from Mum.Mum had a nice hairdryer.She was very happy.I've got a skateboard from Dad and a calculator from Mum.They were very good.
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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