【名词&注释】
监督管理(supervision and management)、医疗机构(medical institutions)、清热解毒(heat-clearing and detoxifying)、血清尿素氮(serum urea nitrogen)、中药饮片管理、检验报告书(written inspection report)、中药饮片生产、中药饮片调剂、生产经营行为(behavior of production and management)、组织生产(organizing production)
[单选题]正常成人血清尿素氮(BUN)的正常参考区间为( ):
A. 3.2~7.1mmol/L
B. 2.2~5.1mmol/L
C. 3.8~6.1mmol/L
D. 1.8~6.5mmol/L
E. 2.3~7.1mmol/L