There is the possibility that hdisk1 in the root volume group is going bad. A decision has been made to replace the disk. After saving all of the data from the disk and unmounting any filesystems on the disk, which of the following commands should be run before removing the disk from the system?()
A. chgv -a n hdisk rootvg; rmdev -1 hdisk1 -d
B. rmdev -1 hdisk1 -d; reducevg -df rootvg hdisk1
C. reducevg -df rootvg hdisk1; rmdev -1 hdisk1 -d
D. reducevg -df rootvg hdisk1; rmdev -1 hdisk1
某男性患者,40岁。有精神分裂症病史10年,近两月服用大剂量氯氮平治疗,3天来发热,畏寒,T39.5℃,查血常规:WBC0.04×10/L。经积极地应用白细胞成分血,肌内注射升白细胞药物,静脉输注抗生素治疗,症状逐渐减轻,但第7天,出现大便次数增多,6~7日后,自述肛门周围疼痛,查大便涂片为白色念珠菌生长;肛指检查:肛周可触有4~5cm肿物,有波动感。引起该感染致病菌的形式是()
A. 菌群移位
B. 菌群失调
C. 二重感染(三度失调)
D. 细菌内毒素
E. 细菌外毒素