哪项是区别血尿与血红蛋白尿的主要方法（）
A.尿色素检查
B.尿蛋白圆盘电泳
C.尿三杯试验
D.尿pH值
E.尿沉渣镜检
参考答案：E
His play was popular and every time ______about it, he owed his success to the support of his friends.
A．talking
B．talked
C．to talk
D．when talking
管理的二重性有（）。
A.自然属性
B.社会属性
C.使用价值
D.价值
