题目

 The man__________has made up his mind to win will never say impossible.     A. whom           B. when            C. which            D. who 答案:D11.设x1,x2是函数f(x)=$\frac{1}{3}{x^3}+\frac{1}{2}a{x^2}$+2bx的两个极值点,且x1∈(0,1),x2∈(1,2),则$\frac{b-2}{a+2}$的取值范围是(  )A.(-2,1)B.(-∞,$\frac{1}{4}$)∪(1,+∞)C.($\frac{1}{4}$,1)D.(-∞,-2)∪(1,+∞)
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