更多"R & D DEPARTMENT RELOCATIONWednesda"的相关试题:
[单项选择]R & D DEPARTMENT RELOCATION
Wednesday’s meeting is compulsory for all R & D staff;
Others welcome to attend for information.
A. R & D will announce at the meeting which departments will relocate.
B. The meeting is about something which affects only one .department.
C. Staff in all departments should attend the meetin
[填空题]
/r/n /r/n /r/n | A meeting |
/r/n /r/n | Predictions | /r/n Reality |
/r/n /r/n | It will be a (16) meeting | /r/n It is (17) . |
/r/n /r/n There will be (18) people at the
meeting. | /r/n There were (19) people. |
/r/n |
/r/n /r/n | |
/r/n /r/n | They are likely to (20) . | /r/n They (21) about most points. |
/r/n /r/n | It will (22) . | /r/n It finished early. |
[填空题]
/r/n /r/n /r/n | Meeting Memo |
/r/n /r/n | Launch time for Mother’s Choice Baby-Sitting Monitor is on (16) |
/r/n /r/n | KATE | /r/n A. Visiting the salespeople in (17) on the earliest flight
B. Visiting the UK agents |
/r/n |
/r/n |
/r/n /r/n | DERECK | /r/n Visiting the component (18) , making sure they meet the
deadline |
/r/n |
/r/n |
/r/n /r/n | (19) | /r/n Visiting the franchise in Italy, (20) and German |
/r/n /r/n | (21) | /r/n A. Staying in the head office to (22) the new launch
strategy
B. Briefing Brain before he goes on business. |
/r/n |
/r/n |
[单项选择]设R和S分别是r和s元关系，且R有n个元组，s有m个元组。执行关系R和S的笛卡儿积，记为T=R×S，则______。
A. T的元数是(r+s)，且有(n+m)个元组
B. T的元数是(r+s)，且有(n×m)个元组
C. T的元数是(r×s)，且有(n+m)个元组
D. T的元数是(r×s)，且有(n×m)个元组
[单项选择]有R和S表如下图所示，A是R的主键和S的外键，D是S的主键，且R与S实施了参照完整性。下列元组中可以正确插入S的是( )
[*]
A. (a1，d1，45)
B. (a2，d2，34)
C. (a3，d5，null)
D. (a3，null，21)
[单项选择]设R和S分别是r和s元关系，且E有n个元组，s有m个元组。执行关系R和S的笛卡尔积，记为T=R×S，则( )。
A. T的元数是(r+s)，且有(n+m)个元组
B. T的元数是(r+s)，且有(n×m)个元组
C. T的元数是(r×s)，且有(n+m)个元组
D. T的元数是(r×s)，且有(n×m)个元组
