The RECYCLEBIN parameter is set to ON for your database. You drop a table, PRODUCTS, from the SCOTT schema.Which two statements are true regarding the outcome of this action?()
All the related indexes and views are automatically dropped
B. The flashback drop feature can recover only the table structure
C. Only the related indexes are dropped whereas views are invalidated
D. The flashback drop feature can recover both the table structure and its data
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调节器的测量与给定偏差越大,则阀门开度()。
A. 越大
B. 越小
C. 与正反作用有关,可能越大,也可能越小
D. 没变化
测所用的敞开式采样器为开口容器,用于采集表层水和靠近表层的水。当有漂浮物质时,不可能采集到有代表性的样品。
A. 正确
B. 错误