do-doing-does模仿例子写一写
题目
do-doing-does模仿例子写一写
piay-[ ]-[ ]
run-[ ]-[ ]
swim-[ ]-[ ]
have-[ ]-[ ]
sing-[ ]-[ ]
say-[ ]-[ ]
go-[ ]- [ ]
make-[ ]-[ ]
sit-[ ]-[ ]
答案
play-playing-palys
run-running-runs
swim-swimming-swims
have-having-has
sing-singing-sings
say-saying-says
go-going-goes
make-making-makes
sit-sitting-sits请采纳
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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