What is true if you want to switch undo tablespaces from the current one, called UNDO1, to a new one called UNDO2?() It is NOT possible to switch unless no active transaction exist in UNDO1. 。 It is possible to switch to UNDO2; but current active transactions will abort. 。 It is possible to switch to UNDO2; current active transactions will be automatically migrated to UNDO2. 。 It is possible to switch to UNDO2; only current active transactions will continue to execute inside UNDO1.。
对社会保障的总体改革趋势认识正确的是()。 在资金方面开源节流。 强化政府责任,不允许市场调节。 在制度结构上由部分累计制转为现收现付制。 在制度体系上强调建立单一的社会保障体系。
在PowerPoint 2000中,如果要同时选中几个对象,按住(),逐个单击待选的对象。 Shift。 Ctrl。 Ctrl+Alt。 Alt。
Flushing dirty buffers out of the buffer cache is influenced to the greatest extent by which of the following process?() ARCH 。 SMON 。 LGWR。 SERVER。
现阶段我国法定的社会保险有()种。 二种。 三种。 四种。 五种。
事中控制的关键是()。