题目

—Is this ________mother? —No, She is ________mother. A . your; my B . his; he C . your; me D . her; his 答案:D 函数f(x)=ax2+(a-2b)x+a-1是定义在(-a,0)∪(0,2a-2)上的偶函数,则 [  ] A. 1 B. 3 C. D. 不存在
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