()is a category assigned to products or services having the same functional use
()is a category assigned to products or services having the same functional use but different technical characteristics.It is not same as quality.()A.Problem B.Grade C.Risk D.Defect
正确答案:B等级是对具有相同使用功能,但技术特性不同的产品或服务所赋予的类别。它与质量不同。
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