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【单选题】
对数据表进行筛选操作,结果是( )。A.
只显示满足条件的记录,将不满足条件的记录从表中删除
B.
显示满足条件的记录,并将这些记录保存在一个新表中
C.
只显示满足条件的记录,不满足条件的记录被隐藏
D.
将满足条件的记录和不满足条件的记录分为两个表进行显示
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【单选题】An entity set whose existence depend on the existence of an identifying entity set, it is called ______ ?
A.
Primary key
B.
Foreign key
C.
Weak entity
D.
Strong entity
【单选题】Cryptic coloring is by far the commonest use of color in the struggle for existence. It is employed for the purpose of attack (aggressive resemblance or anticryptic coloring) as well as of defense (pr...
A.
hunters
B.
nocturnal predators
C.
lions and tigers
D.
insectivorous Vertrbrata
【简答题】It is the existence of and the ability to control precisely these two independent charge-transport mechanisms(运送电荷的机制) that make possible all junction(结型) semiconductor devices.
【简答题】The experiment has __ the possibility of the existence of any life on that planet, but it does not mean there is no life on other planets. A. found out B. pointed out C. ruled out D. carried outanets
【单选题】Cryptic coloring is by far the commonest use of color in the struggle for existence. It is employed for the purpose of attack (aggressive resemblance or anticryptic coloring) as well as of defense (pr...
A.
hunters
B.
nocturnal predators
C.
lions and tigers
D.
insectivorous Vertrbrata
【单选题】The 'main storage' normally means that part of internal storage into which instructions and other data must be loaded for subsequent execution or processing. In large computing systems, the term 'main...
A.
suitable
B.
optional
C.
choice
D.
preferred
【单选题】Is the study of science simply a discipline in search of laws relating to the existence of material truths? Or is it also a search for principles which testify to the reality of a single Creator who h...
A.
there is evidence that scientists are generally atheists
B.
cosmologists read the Bible as part of their research
C.
scientific studies show evidence of the validity of religious accounts of the universe and its origin
D.
intellectual agnosticism has been on the rise
【单选题】Is the study of science simply a discipline in search of laws relating to the existence of material truths? Or is it also a search for principles which testify to the reality of a single Creator who h...
A.
there is evidence that scientists are generally atheists
B.
cosmologists read the Bible as part of their research
C.
scientific studies show evidence of the validity of religious accounts of the universe and its origin
D.
intellectual agnosticism has been on the rise
【单选题】It is said that science has become too complex to acknowledge the existence of universal truths.
A.
address
B.
declare
C.
affirm
D.
perceive
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