模仿例子写一写 例：do doing did
题目
模仿例子写一写 例：do doing did
go
take
play
visit
make
stay
climb
see
答案
go going wenttake taking took play playing played visit visiting visited make making made stay staying stayed climb climbing climbedsee seeing saw 希望能帮到您.
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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