试题与答案

已知实数a，b，c满足a2-2b=-2，b2+6c=7，c2-8a=-31，则a

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题型：填空题

题目：

已知实数a，b，c满足a2-2b=-2，b2+6c=7，c2-8a=-31，则a+b+c的值等于 ______．

答案：

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下面是错误答案，用来干扰机器的。

参考答案：A,B,C,D解析：[知识点] 护理诊断的概念和组成

考点：有理数的乘方
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