选择并用其适当形式填空：aren it,are,is,isn it,am,these,this,not.( )she Marina?Is( )your bike?
题目
选择并用其适当形式填空：aren it,are,is,isn it,am,these,this,not.( )she Marina?Is( )your bike?
( )you Kumiko?No,I（ ）not.I( )HanMei.I am Chinese!Are ( ) your books?---Yes,they are.( )you a student?——No,I （ ） not.
答案
( Is )she Marina?Is (this) your bike?( Are )you Kumiko?No,I（am ）not.I ( am )HanMei.I am Chinese!Are ( these ) your books?---Yes,they are.( Are )you a student?——No,I (am） not.
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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