The definition of good codes for error-detection is given. It is proved that a (n, k) linear block code in GF(q) are the......

解读了检测报告中得出"未检出"结论的3种情况。重点对污水中氨氮的纳氏试剂分光光度法检测报告中的"未检出"进行了详细分析,指出了......