单项选择题

正常人尿渗透压一般多在下列哪项范围内()

A.280~3200sm/kgH2O
B.320~4000sm/kgH2O
C.280-5000sm/kgH2O
D.600~10000sm/kgH2O
E.1000~20000sm/kgH2O