水气开始冷凝的温度称为露点。（）
参考答案：对
Sam _____ some knowledge of the computer just by watching others working on it. [ ]
A. brought up
B. looked up
C. picked up
D. set up
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
