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【单选题】
在 where price between 50 and 60,子句中,()是列名。A.
where
B.
price
C.
between
D.
and
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举一反三
【单选题】Woman: Do you think Professor Simpson will cancel class on account of the special conference? Man: Not likely. Question: What does the man mean?
A.
He doesn't like the professor very much.
B.
He doubts class will be cancelled.
C.
He doesn't want to attend the conference.
D.
He wonders whether the professor is an actor.
【单选题】Professor Simpson ___________ the project carefully and made a fewcorrections.
A.
went up
B.
went clown
C.
went after
D.
went over
【单选题】Why do the man and woman want to talk to Mr. Simpson?
A.
He is a psychology professor with much knowledge.
B.
His views during arguments are very powerful.
C.
He may be able to add information to a research paper.
D.
He has personal experience in this field.
【简答题】传统的集合“并、差、交”运算施加于两个关系时,这两个关系必须 。
【简答题】传统的集合“并、差、交”运算施加于两个关系时,这两个关系必须 。
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