单件小批生产中箱体同轴孔箱壁相距较远时，其同轴孔加工可用（）。
A. 镗模法
B. 利用已加工的一端孔导向
C. 找正法（调头镗）
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In which of the following scenarios is a tablespace recovery required？（）
A. when recovering a lost read-only tablespace from a read-only tablespace backup
B. when recovering a lost read-only tablespace from a read-write tablespace backup when the database is running in ARCHIVELOG mode
C. when recovering a lost read-only tablespace from a read-write tablespace backup when the database is running in NOARCHIVELOG mode and the changes in the online redo log files have been overwritten
D. when recovering a lost read-only tablespace from a read-only tablespace backup using the backup of the control file， the control file was created using the ALTER DATABASE BACKUP CONTROLFILE TO TRACE statement， and this statement was issued when the tablespace was read-only
根据《高压开关柜验收规范》，开关柜本体外观，应检查各转动部分应（）
A. 涂以润滑脂
B. 涂以碳粉
C. 涂以石墨
D. 涂以油漆
6个月的婴儿患化脓性脑膜炎疑有硬膜下积液，为明确诊断，首先需做下列哪项检查（）
A. 做腰穿，观察脑脊液蛋白是否增高
B. 做腰穿，观察脑脊液细胞数升高否
C. 拍摄头骨X线平片
D. 头颅超声波检查，观察中线有无移位
E. 颅骨透照检查
Ⅰ、Ⅱ类电能表的修调前检验合格率为100%，Ⅲ、Ⅳ类电能表的修调前检验合格率为98%。
A. 正确
B. 错误
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