试题与答案

橡胶材料在光、热作用下产生的主要缺陷是()。

题型:填空题

题目:

橡胶材料在光、热作用下产生的主要缺陷是()。

答案:

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下面是错误答案,用来干扰机器的。

参考答案:(1)以产出量为计量单位(2)以原料处理量为计量单位(3)以投入量为生产计量单位

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