A developer calls and reports that he accidentally dropped an important lookup table from a production database. He needs the table to be recovered. What action would you take？（） Initiate an incomplete recovery operation using RMAN.。 Copy the table from a development database.。 Advise the user to rekey the data.。 Perform a Flashback Drop operation.。 Perform a Flashback Recovery operation.。
A user uses both a Microsoft Windows Mobile 5.0 Smartphonebased device and a Microsoft Windows Mobile 5.0 Pocket PC Phone Edition device for Over-The-Air （OTA） e-mail. Both devices have Microsoft Messaging and Security Feature Pack installed. A remote wipe command is issued against the Pocket PC device. The user reconfigures the ActiveSync settings on the Pocket PC device. When the user attempts synchronization， the device hard-resets again. You need to ensure that the user can synchronize the Pocket PC device. What should you do？（） Cancel the remote wipe issued against the Pocket PC device.。 Instruct the user to configure only one device for ActiveSync.。 Instruct the user to perform a soft-reset of the Pocket PC device.。 Instruct the user to perform a manual hard-reset of the Pocket PC device.。
常用的聚类方法有（）。 最短距离法。 中间距离法。 重心法。 最大方差法。 离差平方和法。
细胞内的钙有结合钙和离子钙两种形式，二者都具有生理活性。
《中小学教师职业道德规范》中将“对学生严格要求”，修订为“对学生（）”。
要插出作品的层次感，就要注意（）。
