A system administrator has a failed disk drive that is mirrored to another disk drive. They successfully removed the logical volume copies off of the failed disk drive. Which of the following commands should be used to remove the failed disk drive from the volume group?()
A. chvg
B. rmdev
C. reducevg
D. exportvg
患者,女性,45岁,上腹痛2周余。B超检查示胰头区囊实性占位性病变。拟行18F-FDGPET/CT显像评估占位性病变性质。显像前测定血糖水平9.6mmol/L。18F-FDGPET/CT显像示胰头低密度病灶区代谢无明显局灶性异常增高,但术后病理提示为黏液腺癌。造成显像假阴性结果的原因可能是()。
A. 黏液腺癌病灶摄取FDG较少或不摄取
B. 血糖水平升高
C. 急性胰腺炎
D. A和B均有可能
E. B和C均不是
为什么锅炉点火前要启动引、送风机通风10~15分钟?
58岁女性患者,间歇无痛肉眼血尿25个月余,查体末发现异常。肾脏B超提示右肾中下极4.5cm低回声肿物,向肾外侧突出。对该病人治疗时手术切除范围应包括()
A. 右侧肾脏
B. 右侧肾脏,肾周脂肪囊,肾周筋膜及部分输尿管
C. 右侧肾脏,右侧全长输尿管
D. 右肾部分切除术
E. 右肾肿瘤切除术