——The birthday party is a great success .We had a good time .——_________.
题目
——The birthday party is a great success .We had a good time .——_________.
A.It doesn't matter.
B.No,thanks.
C.It's not very good .
D.I’m glad to hear that.
答案
D
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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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