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【判断题】
关系数据的操作对象是关系,操作结果也是关系。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】Without such safeguards, data can be siphoned o without anyone knowing.
A.
taken by sipping
B.
drawn off by a tube used to convey liquid from one container to another
C.
drawn in by a vacuum
D.
transferred over a period of time, especially illegally or unfairly
【简答题】对那些特殊的有保护价值的建筑物估价应以重置成本为宜。（ ）
【简答题】对那些特殊的有保护价值的建筑物估价应以重置成本为宜。( )
【单选题】It was reported that there were about ______ people in the rural areas in 2004 without safe drinking water.
A.
2 million
B.
2 billion
C.
90 million
D.
900 million
【单选题】Mike must be angry with me, for he walked____me without even saying hello.
A.
past
B.
on
C.
at
D.
over
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