1 There is your pencil under the chair?
题目
1 There is your pencil under the chair?
2 How many money do you have?
3 He come from the USA.
4 i don't know his.
还有一个
5 who's sister is that?
答案
1 Is there your pencil under the chair?
2 How much money do you have?
3 He comes from the USA.
4 I don't know him.
5 whose sister is that?
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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