掌形识别处理系统包括以下几个处理过程。()
A. 采集
B. 解码
C. 比对
D. 匹配
E. 识别
体育教学活动应控制好活动时间,一般小班为()分钟。
A. 15~20
B. 20~25
C. 25~30
D. 40~45
当抽油井井口装有无线回压传感器时,RTU中L8状态指示灯闪烁或50s亮灭一次表示()传感器井口回压有数据接收。
A. 无线载荷
B. 无线死点开关
C. 无线温度
D. 无线压力
In which scenario will you use the Flashback Version Query feature?()
A. when you want to restore a table that has been dropped from the Recycle Bin
B. when you want to identify the transaction ID of the transaction that deleted some important records from a table
C. when you want to recover the schema of a dropped user
D. when you want to restore a dropped tablespace