连词成句:did,they,shop,what,at,the,buy?(2)go,often,you,ice-skating,how,do?
题目
连词成句:did,they,shop,what,at,the,buy?(2)go,often,you,ice-skating,how,do?
答案
连词成句:did,they,shop,what,at,the,buy?(2)go,often,you,ice-skating,how,do?
What did they buy at the shop?
How often do you go ice-skating?
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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