Examine the statement: Create synonym emp for hr. employees; What happens when you issue the statement? ()
An error is generated.
B. You will have two identical tables in the HR schema with different names.
C. You create a table called employees in the HR schema based on you EMP table.
D. You create an alternative name for the employees table in the HR schema in your own schema.
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操作题:简单分析洗瓶机日常操作中可能出现的故障及排除措施(机械故障除外)。
进料()变化对塔内上升蒸汽量有很大影响,因此塔顶冷凝量和塔釜加热量需要调节
A. 浓度
B. 回流比
C. 压力
D. 温度
下列属于合同法的基本原则的有()
A. 平等原则
B. 自愿原则
C. 公平原则
D. 诚实信用原则