50.You can see the house ______ for years
题目
50.You can see the house ______ for years
A.hasn't painted
B.isn't painted
C.hasn't been painted
D.had been painted
答案
C
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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.
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