【简答题】【消耗次数：1】
三元式之间的联系是通过[填空1]实现。
参考答案：
复制
纠错
相关题目
【简答题】
四元式之间的联系是通过[填空1]实现。
【简答题】
通常有三种表示三地址代码的方法，分别为三元式, 四元式，[填空1]。
【简答题】
若|A|=2,则A上有[填空1]个三元关系。
【简答题】
三元一次不定方程的一般形式是[填空].
【多选题】
若两个实体之间的联系是1:m，则实现1:m联系的方法是（ ）。
①
A.将“m”端实体的码和联系的特有属性中加入“1”端的实体关系模式中
②
B.将“1”端实体的码和联系的特有属性中加入“m”端的实体关系模式中
③
C.将两端实体的码和联系的特有属性分别加入对方的关系模式中
④
D.将两端实体的码和联系的特有属性放入一个独立的关系模式中
【简答题】
实体之间的联系可抽象为三类，它们是1对1、[填空]和多对多。
随机题目
【单选题】
The lecture provided ____ insight into foreign affairs.
①
penetrating
②
pendular
③
passive
④
penal
【单选题】
Linda is 35 years o1d and, after two close relationships, the prospect of staying single__________ her.
①
impresses
②
depresses
③
threatens
④
stuns
【单选题】
The manager said that there were two reasons______ our sales dropped sharply last year.
①
because
②
since
③
why
④
while
【单选题】
Henry’ s actually ______ of telling lies, pretending to be sick when he s heathy.
①
capable
②
spontaneous
③
competent
④
expert
【单选题】
Mr. Brown had hardly said a word since supper,___ had his wife.
①
either
②
or
③
nor
④
So
【单选题】
Mary hopes to be ___ from hospital next week.
①
dismissed
②
discharged
③
expelled
④
resigned
【单选题】
_______ the look on his face, he doesn’t t quite understand what the speaker is saying.
①
Judge by
②
Judging by
③
To judge by
④
To be judged by
【单选题】
It is reported that a (n)________ of accidents has occurred at that crossroads.
①
series
②
lot
③
number
④
amount
【单选题】
The popularity of the film shows that the reviewers’ fears were completely _____.
①
unjustified
②
unjust
③
misguided
④
unaccepted