Which two statements regarding the control file and Recover Manager are true? ()
A. The control file can grow in size.
B. The control file can store RMAN scripts.
CONTROL_FILE_RECORD_KEEP_TIME determines retention time for RMAN records.
D. The RMAN catalog can exist solely in the control file of the target database.
QJ10和XJ01系列自耦变压器减压起动器,在进入正常运行时,自耦变压器仍然带电()
A. 正确
B. 错误
表面温度为50ºC的蒸汽管道经过室内时,为了减少表面散热损失,可以采取措施()
A. 表面涂黑色油漆;
B. 表面涂白色油漆;
C. 包铝箔;
D. 不需要。
负压运行的锅炉中,沿着烟气流程到空气预热器前烟气侧的RO2、O2是在不断增大的。
A. 正确
B. 错误