改一般疑问句,否定回答
题目
改一般疑问句,否定回答
It is an English dictionary.
I am 13.
This is a pencil bok.
That is a computer game.
My name is David.
She is Jenny.
This is my book.
It is a pen in English.
答案
Is it an English dictionary?----No,it isn'tI am 13.Is this a pencil box.----No,it isn'tIs that a computer game.---No,it isn't.Is your name David?----No,it isn't.Is she Jenny?----- No,she isn'tIs this ...
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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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