在儿童学会说话的过程中,“双词阶段”标志着儿童产生的语言能力是()
A. 语音能力
B. 语汇能力
C. 语法能力
D. 语义能力
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吸附塔拆开头盖检修时,要通过吸附塔临时接氮管引入氮气,保护吸附剂。
A. 正确
B. 错误
()宣布了中国人民政治协商会议第十二届全国委员会第五次会议的闭幕。
A. 李克强
B. 张德江
C. 张高丽
D. 俞正声
按照配电室的安全技术要求,关于施工现场配电室位置叙述错误的是()。
A. 施工现场配电室周围应振动小
B. 施工现场配电室不要设在容易积水的场所
C. 施工现场配电室应尽量靠近负荷中心
D. 施工现场配电室应设在污染源的下风侧
You are working as a DBA on the decision support system. There is a business requirement to track and store all transactions for at least three years for a few tables in the database. Automatic undo management is enabled in the database. Which configuration should you use to accomplish this task?()
A. Enable Flashback Data Archive for the tables.
B. Specify undo retention guarantee for the database.
C. Enable supplemental logging for the database.
D. Query V$UNDOSTAT to determine the amount of undo that will be generated and create an undo tablespace for that size.
E. Create Flashback Data Archive on the tablespace on which the tables are stored.