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当前学科:粮油质量检验员考试
题目:
单选
用经较准的万分之一分析天平称量0.1g试样,其相对误差是()。
A . A、±0.1%
B . B、+0.1%
C . C、-0.1%
D . D、无法确定
答案:
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