扁平湿疣与尖锐湿疣的鉴别诊断最为简单的方法是()
A.梅毒血清试验
B.组织病理学检查
C.醋酸白试验
D.暗视野显微镜检查
参考答案:A
肝豆状核变性是因为下列哪种物质代谢障碍所引起的()
A.铁
B.锌
C.镁
D.铜
E.铅
What does cost performance index (CPI) less than 1.0 indicate ?()
A.Cost overrun of the estimate
B.Cost according to the estimate
C.Cost underrun of the estimate
D.Early progres