四篇简单的英语作文
题目
四篇简单的英语作文
1.My family
2.My favorite season.
3.My favorite festival.
4.My summer holiday.
答案
1.My family There are four people in my family,my parents,my bother and I.My family is pretty good.I’m really happy.My brother is shy and funny.He is good at sports and does well in volleyball.But he...
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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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