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【Daily Question】Chemical Analysis Edition, 2019.6.11

2019-06-11View Original

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This post was last edited by zjp on 2019-6-11 07:32. Multiple-choice question: A green calibration mark on a measuring instrument indicates (). A、Qualified and can be used B、Unqualified and should be discontinued C、The testing function is qualified, but other functions are not working D、No special meaning A

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