求幼儿英语课堂好的warm up.
题目
求幼儿英语课堂好的warm up.
答案
,1.hello how are you fine fine fine thank youoh oh just so sono no i am terrible2,up up go go ,down down go goup go down go up down go go 3.walking walking walking walking jump jump jump running runni...
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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