一些ying yu ti
题目
一些ying yu ti
例：No swimming.-You can't swim here.No Photos.-You can't take photos here.No parking.-You can't___________your car here.No smoking.-You can't_____________here.No littering.-You can't___________here.No climbing.-You can't____________the tree here.
答案
No parking-You can't___park___your car here.
No smoking.-You can't____smoke_________here.
No littering.-You can't____litter_______here.
No climbing.-You can't_______climb_____the tree here.
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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