下列各项所述不属于选择混凝土运输浇筑方案的原则的是（）。 起重设备能够控制整个建筑物的浇筑部位。 运输效率高，成本低，转运次数少，不易分离，质量容易保证。 主要设备型号要多，性能良好，配套设备能使主要设备的生产能力充分发挥。 在工作范围内能连续工作，设备利用率高，不压浇筑块，或不因压块而延误浇筑工期。
A manufacturer wishes to create a site where its resellers can get real-time quotes and order from distributors of the manufacturer’s products. Which is the most appropriate WebSphere Commerce business model to support this requirement？（） B2B Direct。 Demand Chain。 Hosting。 Supply Chai。
Your ARCHIVELOG-mode database has lost three datafiles and shut down. One is assigned to the SYSTEM tablespace and two are assigned to the USERS tablespace. You can choose from the following steps to recover your database： a. Restore the three database datafiles that were lost. b. Issue the Startup Mount command to mount the database. c. Issue the alter database open command. d. Issue the alter database open resetlogs command. e. Recover the database using the recover database command. f. Recover the datafiles with the recover datafile command. g. Take the datafiles offline. Which is the correct order of these steps in this case？（） a， b， e， c。 b， e， d。 a， b， d， c。 b， g， c， f。 a， b， d， f。
The Oracle Database 11g database is running in the ARCHIVELOG mode. The archived redo log files are stored on three locations. The Flash Recovery Area is one of the locations. The details are given below: Which statement is true regarding what this command accomplishes?（） All archived redo log files backed up at least twice to tape are deleted.。 All archived redo log files backed up at least once to tape are eligible for deletion.。 All archived redo log files backed up at least twice to tape are deleted from the flash recovery area.。 All archived redo log files in local archiving destinations and the flash recovery area backed up at least twice to tape are eligible for deletion.。
化学是（） 研究物质组成、结构、性质和变化规律的科学。 研究物质转换方法的科学。
Which IBM System Director task will give you the ability to update firmware and device drivers on System x servers？（）
