The loss of which two types of files may require a recovery with the RESETLOGS option?()
A. control files
B. password file
C. archived log files
D. system-critical data files for which all the redo entries are present
E. non-system-critical data files for which all the redo entries are present
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莪术的功效是()。
A. 破血行气,消积止痛
B. 活血止痛,行气解郁,清心凉血,利胆退黄
C. 活血行气,止痛,消肿生肌
D. 破血通经,逐瘀消癥
E. 活血祛瘀,润肠通便,止咳平喘
人防建筑物内,照明灯具应距地()m以上。如照明灯具距地小于这个数值时,应装于人手不易触及的地方或有防护的壁龛内,否则,应采用不大于36V的低压灯。供给低压电源的双线圈变压器,应装在比较干燥和不易触及的地方。
A. 1.8
B. 22
C. 2.5
D. 3