能引起细胞发生癌变的因素是
①X射线照射 ②煤焦油的刺激 ③温度过高 ④细胞失活 ⑤肿瘤病毒的侵染 ⑥紫外线照射[ ]
A.①③④⑤
B.①②③⑤
C.①②⑤⑥
D.②④⑥
答案:C
男性,50岁,右肱骨中段骨折内固定术后,手指下垂2个月,首先考虑的诊断是()。
A.骨不连接
B.神经损伤
C.肌肉损伤
D.血管损伤
E.功能锻炼不够
Records which must be retained on board after report of casualty to a vessel include the().
A.tour reports
B.hull reports
C.machinery repair record book
D.deck equipment log