整合感染(integratedinfection)
参考答案:
病毒感染细胞后,因病毒与细胞的性质,病毒基因组整合于宿主染色体,并随细胞分裂传递给子代细胞。
The incomes of skilled workers went up. __________, unskilled workers saw their earnings fall. [ ]
A. Moreover
B. Therefore
C. Meanwhile
D. Otherwise
不是骨质增生的病因的是()
A.某些原发性肿瘤
B.外伤
C.慢性炎症
D.维生素D缺乏
E.某些代谢或内分泌障碍