为保证检验信息正确、有效的先决条件是 () A.分析前质量保证 B.室间质量评价 发布时间:2017-06-03 23:50 │ 来源:www.tikuol.com 题型:单项选择题 A1/A2型题 问题: 为保证检验信息正确、有效的先决条件是 ()A.分析前质量保证B.室间质量评价C.精密度D.室内质量控制E.分析中质量保证
题型:单项选择题 A1/A2型题 看图,补全对话。1. A: What is she doing? B: She is _________________________. 2. A: What is he doing?B: He is _________________________.3. A: Why is she ____________________?B: Because it's time for bed. 查看答案