she spend about twenty minutes riding her bike to work改为同义句
题目
she spend about twenty minutes riding her bike to work改为同义句
it( )( )about twenty minutes ( )( )her bike to work
答案
有两种填充方式：it (will )(take ) about twenty minutes ( for)( riding )her bike to workit (takes )(her )about twenty minutes ( to)(ride )her bike to work【英语牛人团】
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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