You need to restore your database back to 9/30/2008 at 18:00. In what order would you run the following commands to compete this task?() a. restore controlfile until time `09/30/2008:18:00:00’ b. restore database until time `09/30/2008:18:00:00’ c. restore spfile until time `09/30/2008:18:00:00’ d. recover database until time `09/30/2008:18:00:00’ e. alter database open resetlogs f. alter database open
A. b, d, e
B. b, d, f
C. c, a, b, d, e
D. c, a, b, d, f
E. a, b, d, e
与血的运行关系最为密切的是()。
A. 肺脾肾
B. 心脾肝肾
C. 心肺肝脾
D. 脾肺肾肝
感染HIV后,下列哪项不是导致机体免疫功能受损的主要机制()
A. 对CD4+淋巴细胞的直接破坏
B. 被感染的CD4+淋巴细胞表面表达gp120,可与其他CD4+;细胞相互融合,细胞被破坏
C. 骨髓干细胞感染HIV,使免疫细胞生成减少
D. HIV感染B细胞,能使其大量破坏,抗体生成减少
E. 感染HIV后诱发机体的免疫反应,使受感染细胞受到攻击而被破坏
带肋钢筋应在其表面轧上()标志,依次还可轧上厂名和规格。