A. Tracking the most recent read time for a table segment in a user tablespace
B. Tracking the most recent write time for a table segment in a user tablespace
C. Tracking insert time by row for table rows
D. Tracking the most recent write time for a table block
E. Tracking the most recent read time for a table segment in the SYSAUX tablespace
F. Tracking the most recent write time for a table segment in the SYSAUX tablespace
第1题:
No matter how frequently _____, the works of Beethoven always attract large audiences.
(A) performing (C) to be performed
(B) performed (D) being performed
选B
主语是the works,the works与perform之间是被动关系,所以用过去分词performed
第2题:
A.Preparation
B.Planning
C.Design
D.Implementation
E.Operation
F.Optimization
第3题:
A.Preparation
B.Planning
C.Design
D.Implementation
E.Operation
F.Optimization
第4题:
A. Autoconfiguration
B. Automatic 6to4 Tunnel
C. Automatic 6to4 Relay
D. Network Address Translator - Protocol Translator (NAT - PT)
E. Intrasite Automatic T unnel Address Protocol (ISATAP)
第5题:
A.Planning
B.Design
C.Implementation
D.Operation
E.Optimization
第6题:
1. 创建并访问DataFrame对象。 1) 创建3×3DataFrame数据对象:数据内容为1-9;行索引为字符a,b,c;列索引为字符串‘one’,‘two’,‘three’; 2) 查询列索引为‘two’和‘three’两列数据; 3) 查询第0行、第2行、第0列、第2列数据; 4) 筛选第1列中值大于2的所有行数据,另存为data1对象; 5) 为data1添加一列数据,列索引为‘four’,值都为10; 6) 将data1所有值大于9的数据修改为8; 7) 删除data1中第0行和第1行数据。