题目内容
有一段演绎推理：“因为对数函数
是减函数；已知
是对数函数，所以是减函数”，结论显然是错误的，这是因为（***） | A．大前提错误 | B．小前提错误 | C．推理形式错误 | D．非以上错误 |
A解析:
略
略
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