按GB7588-2003《电梯制造与安装安全规范》规定，电梯额定（）速度时，应用渐进式安全钳装置。 υ＞0.63m/s。 υ＞1.0m/s。 υ≥0.63m/s。 υ≥1.0m/。
筒车在中国古代南方农业生产中发挥过重要作用，这一灌溉工具创制于（）。 三国。 南北朝。 唐代。 南宋。
You backed up the database at 8 a.m. today using an online backup. Accounting made a large change to the underlying data between 10 a.m. and noon. Which of the following actions would ensure that the changes could be recovered using the 8 a.m. backup？（） Create a manual incremental online database backup.。 Back up all the archived redo logs generated since the 8 a.m. backup.。 Create a brand-new backup after all the changes have been applied.。 There is no way to make the changes recoverable based on the 8 a.m. backup.。 Perform an online backup of the tablespace（s） that contained changed data.。
A data processing company is comparing the specifications of the SunFire 6800， SunFire 12k and the IBM pSeries 670 for a server consolidation project. Which of the following p670 capabilities would provide the most significant benefit for server consolidation？（） Maximum memory。 Maximum processor speed。 Maximum number of PCI slots。 Maximum number of partitio。
碱度可分为（） 甲基橙碱度和酚酞碱度。 甲基橙碱度和全碱度。 酚酞碱度和小碱度。
Operator needs to remove all leading comments # from shell.script file. Which of the following vi sub-command can achieve this?（）
