下列临床标本不能冷冻保存的是() A: 脑脊液CAAIOTCVPMJXWIDJHVNGBXLGDHRS B: 尿液CAAIOTCVPMJXWIDJHVNGBXLGDHRSUH C: 伤口分泌物CAAIOTCVPMJXWIDJHVNGBXLG D: 深部脓液CAAIOTCVPMJXWIDJHVNGBXLGDH E: 胸腔积液CAAIOTCVPMJXWIDJHVNGBXLGDH

诊断泌尿系统疾病首选的检查项目是() A: 内生肌酐清除率CAAIOTCVPMJXWIDJHVNG B: 血尿素氮CAAIOTCVPMJXWIDJHVNGBXLGDH C: 血清肌酐CAAIOTCVPMJXWIDJHVNGBXLGDH D: 尿浓缩稀释试验CAAIOTCVPMJXWIDJHVNG E: 尿常规检查CAAIOTCVPMJXWIDJHVNGBXLG