关于蛋白尿，下列哪一项是错误的（ ）。

A．大、中、小分子均有的蛋白尿，见于肾小球肾炎

B．微量白蛋白尿，见于早期糖尿病肾病

C．溢出性蛋白尿，见于多发性骨髓瘤

D．分泌性蛋白尿，见于肾小管-间质疾病

E．β2微球蛋白尿为微小病变型肾病的特征

One of the limitations of foam as an extinguishing agent is that foam（）.

A.cannot be made with salt water

B.is heavier than oil and sinks below its surface

C.is corrosive and a hazard to fire fighters

D.conducts electricity