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【判断题】
Patents, copyrights, and trademarks establish ownership rights over intellectual property.A.
正确
B.
错误
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举一反三
【多选题】Select the incorrect view of representing screw connection. (Multiple options: 10 points)
A.
(1)
B.
(2)
C.
(3)
D.
None
【单选题】Select the correct view of representing bolt connection. (Single option: 10 points)
A.
(3)
B.
(2)
C.
(1)
D.
None
【单选题】Select the correct view of representing screw connection. (Single option: 10 points)
A.
(3)
B.
(1)
C.
(2)
D.
None
【判断题】生态智慧农业实践必须具有恰当的技术策略:一是基于资源禀赋的农业规划设计。二是基于资源节约的要素精量匹配。三是基于环境友好的资源循环利用。四是基于人工智能的综合服务平台。()
A.
正确
B.
错误
【多选题】Select the incorrect view of representing screw connection. (Multiple options: 10 points)
A.
(1)
B.
(3)
C.
(2)
D.
None
【单选题】A view is created with the following statement:CREATE VIEW v1 AS SELECT col1, col2, col3 FROM t1 WHERE col4 > 1000 ; When will DB2 access the data from table T1 for view V1?（）
A.
When view V1 is created
B.
Each time the REFRESH VIEW v1 statement is executed
C.
Each time an SQL statement is executed against view V1
D.
Only the first time an SQL statement is executed against view V1
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