尿毒症病人尿液的特点是（）

A.尿量明显减少

B.尿中颗粒管型明显增加

C.尿中蜡样管型明显增加

D.尿蛋白定量随病情恶化而增加

E.尿比重常固定在1.010左右

If gold is marked with a Karat quality mark, it must also bear ______.

A．a national gold and silver stamp

B．the registered trademark of the entity standing behind the mark

C．a "made in the USA" mark

D．a percentage mark