Teachers have to constantly update their knowledge in order to maintain their professional ______.

A．consequence

B．independence

C．competence

D．intelligence

新鲜尿液具有腐臭味，提示为（）。

A.有机磷中毒

B.苯丙酮尿症

C.晚期膀胱癌

D.酮症酸中毒

E.慢性尿潴留