how was your shopping day yesterday?l didn;t()the shoppingAloveBenjoyCfeel
题目
how was your shopping day yesterday?l didn;t()the shoppingAloveBenjoyCfeel
happy inDfeel good of
why did all of them go to 上海?用度假来回答All of them went to shanghai（)()
lt was very cool()And so we all felt very cool,too.Aall a dayB.all the daysC.every dayD.all day
答案
B...on vacation...D
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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