The ORDERS table belongs to the user OE. OE has granted the SELECT privilege on the ORDERS table to the user HR.Which statement would create a synonym ORD so that HR can execute the following query successfully?()
A. CREATE SYNONYM ord FOR orders; This command is issued by OE
B. CREATE PUBLIC SYNONYM ord FOR orders; This command is issued by OE
CREATE SYNONYM ord FOR oe.orders; This command is issued by the database administrator
D. CREATE PUBLIC SYNONYM ord FOR oe.orders; This command is issued by the database administrator&e
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下列财产中,可以用作抵押的有()
A. 北京大学的教学楼
B. 国有企业的机器设备
C. 半成品
D. 正在建造的建筑物
原油残炭是油品中胶状物质和不稳定化合物的间接指标。
A. 正确
B. 错误
下面()不是桥隧巡守工应该遵守的制度。
A. 水位、流冰观测制度
B. 巡回检查制度
C. 病害观测制度
D. 定期检查钢梁杆件制度