Examine the following steps performed on a database instance: 1:The DBA grants the CREATE TABLE system privilege to the SKD user with ADMIN OPTION. 2:The SKD usercreates a table. 3:The SKD user grants theCREATETABLE system privilege to the HR user. 4:The HR user creates a table. 5:The DBA revokes the CREATE TABLE system privilege from SKD. Which statement is true after step 5 is performed()
A. The table created by SKD isnot accessibleand SKD cannot create new tables.
B. The tables created by SKD and HR remain, but both cannot create new tables.
C. The table created by HR remains and HR still has the CREATE TABLE system privilege.
D. The table created by HR remains and HR can grant the CREATE TABLE system privilege to other users.
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()是指向电子现金充值的业务。
A. 圈提
B. 圈存
C. 借电卡
D. 结清
指令标志牌中表示指令标志的图形边框是三角形。
A. 正确
B. 错误
PWM的中文意思是脉冲调制
A. 正确
B. 错误
根据南网技术规范,广东电网公司的网省级代码是()
A. 9
B. 1
C. 2
D. 3