1.what is the last day of the week?2.name two months that have 31 days?3.which month has 28 day
题目
1.what is the last day of the week?2.name two months that have 31 days?3.which month has 28 day
答案
1 Saturday 2 January March 3 Feburary
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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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