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【简答题】
在关系数据模型中，两个关系R1与R2之间存在1∶M的联系，可以通过在一个关系R2中的（）值在相关联的另一个关系R1中检索相对应的记录。
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举一反三
【判断题】The use of euphemisms has the effect of removing derogatory overtones and the disassociative effect as such is usually long-lasting.
A.
正确
B.
错误
【单选题】I can’t imagine _____that with such a famous author.
A.
work
B.
to work
C.
to be working
D.
working
【单选题】In a new book called Predictions, some of the world's greatest thinkers present a vision of the future with overtones of a science fiction film. Futuristic author Arthur C Clarke and others suggest th...
A.
the speed of computers is faster than ever
B.
scientists encounter unprecedented difficulties
C.
the intelligence of computers is more important than the speed
D.
there is much room for the improvement of computer intelligence
【单选题】In a new book called Predictions, some of the world's greatest thinkers present a vision of the future with overtones of a science fiction film. Futuristic author Arthur C Clarke and others suggest th...
A.
the speed of computers is faster than ever
B.
scientists encounter unprecedented difficulties
C.
the intelligence of computers is more important than the speed
D.
there is much room for the improvement of computer intelligence
【单选题】— I can't imagine that great destruction was made to the city by the snowstorm. — ________. [ ]
A.
Nor am I
B.
So do I
C.
Me, too
D.
Me, neither
【单选题】__________ 查看材料
A.
that have favorable overtones for the company initiated by the public relations department
B.
not all publicity is initiated by the firm
C.
usually in the form. of press releases or press conference
D.
such as its product quality， the servicing and handling of complaints， and the tenor of the advertising
E.
what it means to the company is
F.
Although the basic purpose of public relations is to provide positive influence on the public image
【单选题】In a new book called Predictions, some of the world' s greatest thinkers present a vision of the future with overtones of a science fiction film. Futuristic author Arthur C Clarke and others suggest t...
A.
the speed of computers is faster than ever
B.
scientists encounter unprecedented difficulties
C.
the intelligence of computers is more important than the speed
D.
there is much room for the improvement of computer intelligence
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