A. 窦道 B. 糜烂 C. 空洞 D. 瘘管 E. 溃疡
A. 对 B. 错
A. He thinks it is necessary. B. He thinks it is regrettable. C. He thinks it is both regrettable and necessary. D. He doesn’t think much about it.
A. CD8+CTL B. CD4+Th1 C. IgM D. SIgA E. IgG