单项选择题
A.45% B.50% C.60% D.70% E.90%
A.以早期病例常见 B.常见原发于结外器官 C.较少见骨髓受侵 D.常见肝和骨髓受侵 E.常见于纵隔受侵
A.45% B.50% C.55% D.65% E.75%