You executed the following FLASHBACK TABLE command: FLASHBACK TABLE emp TO TIMESTAMP (’11:45’,’hh12:mi’); Which two statements are correct? ()
AThe FLASHBACK TABLE statement will not be written to the alert log file.
BThe EMP table that was dropped by mistake from the database will be restored.
CThe changes made to the EMP table since the specified time will be undone.
DThe FLASHBACK TABLE statement will not maintain the existing indexes on the EMP table.
EThe FLASHBACK TABLE statement will be executed within a single transaction.
FThe list of transactions that have modified the EMP table since the specified time will be displayed.
在EXCEL2003中,已知B2、B3单元格中的数据分别为1和3,使B4至B6单元格中的数据都为3的自动填充方法正确的是()
A、选定B3单元格,拖动填充柄到B6单元格
B、选定B2:B3单元格,拖动填充柄到B6单元格
C、以上两种方法都不可以
D、以上两种方法都可以
当对某段设置的行距为12磅的“固定值”,这时以嵌入型方式在该段落中插入一幅高度大于行距的图片,结果为()。
A、系统显示出错信息,图片不能插入
B、图片能插入,系统自动调正行距,以适应图片高度的需要
C、图片能插入,图片自动浮于文字上方
D、图片能插入,但无法全部显示插入的图片
You executed the following code: SQL> CERATE TABLE COUNTRY (COUNTRY_ID CHAR(2) CONSTRAINT COUNTRY_ID_nn NOT NULL, COUNTRY_NAME VARCHAR2(20), CURRENCY_NAME VARCHAR2(20), CONSTRAINT COUNTRY_ID_PK PRIMARY KEY (COUNTRY_ID)) ORGANIZATION INDEX; Which types of tables will be created automatically?()
A、 journal table
B、 clustered table
C、 mapping table
D、 partitioned table
AutoCAD的图形文件的格式是()。
A、dwg
B、dwt
C、dws
D、dwf
什么是户外广告?