16. In what case do you need to write a leave letter?When you need to be absent from your work for_______________.17. Why should you write a leave letter as early as possible?To allow your employer to_______________ for your leave.I8. What should you be specific about in your leave letter?You should be as specific as you can about the ______________.19. What should you be honest about with your boss?You should be honest about why you_________________.20. What details may you include in your leave letter?You may suggest how your work will be_______________.
肉芽组织中常见的细胞包括
A. 郞罕氏巨细胞
B. 成纤维细胞
C. 新生的内皮细胞
D. 浆细胞
下列哪种细胞属于永久性细胞
A. 神经细胞
B. 表皮细胞
C. 心肌细胞
D. 肠上皮细胞
患者,男性,30岁,骨折愈合良好,1年后骨折处骨组织病理变化表现为
A. 大量成纤维细胞
B. 大量新生毛细血管
C. 正常骨组织
D. 大量多核巨细胞