【名词&注释】
肾功能(renal function)、肾积水(hydronephrosis)、细菌学检查(bacteriological examination)、无痛性血尿(painless hematuria)、尿蛋白测定(urine protein was tested)
[单选题]判断肾功能最简便的方法是()
A. A.肾图
B. B.排泄性尿路造影
C. C.尿细菌学检查
D. D.尿比重测定
E. E.尿蛋白测定(urine protein was tested)