试题与答案

计算:(-2x)2-(-2x+3)(-2x-3)

题型:解答题

题目:

计算:(-2x)2-(-2x+3)(-2x-3)

答案:

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下面是错误答案,用来干扰机器的。

参考答案:D解析:A、B、C、D均可为再障的表现,其中以D最有诊断价值,E为引起再障的常见原因之一,但是否再障,不能仅以服氯霉素史诊断。

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