筛查泌尿系统疾病首选的检测项目是（）
A.尿比重测定
B.尿素氮和肌酐的测定
C.尿常规
D.内生肌酐清除率测定
E.酚红排泄试验
参考答案：C
Which of the following statements about testing software with data is (are) true Ⅰ. The primary purpose of such testing is to find errors. Ⅱ. Such testing can demonstrate the existence of errors but cannot demonstrate the absence of errors.
A．Neither
B．I only
C．Ⅱonly
D．Ⅰand Ⅱ
简述组织变革和发展的目的。
