骨膜呈层状或花边状增生为后天性骨梅毒的重要特征。
参考答案:对
The practice of hanging clothes across the street is a common _____ in many parts of the city. [ ]
A. look
B. sign
C. sight
D. appearance
可用于检测IgM类型的RF的方法()
A.胶乳颗粒凝集实验
B.速率散射比浊法
C.ELISA
D.激光比浊法
E.RIA法