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【简答题】
设有关系模式R(运动员编号,比赛项目,成绩,比赛类别,比赛主管),用来存储每个运动员参加各项比赛的成绩以及各项比赛所属的类别和主管。如果规定:每个运动员参加一个比赛项目,只有一个成绩;每个比赛项目只属于一个比赛类别;每个比赛类别只有一个比赛主管。试回答下列问题: (1) 根据上述规定,写出关系模式R的基本函数依赖和候选码。 (2) 在函数依赖范畴内关系模式R最高属于第几范式?为什么? (3) 如果R不属于3NF,请将R分解成3NF模式集。
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举一反三
【单选题】（2013）确诊血友病的检查是
A.
肾上腺素试验
B.
凝血活酶生成及纠正试验
C.
D-二聚体测定
D.
血小板聚集试验
E.
毛细血管脆性试验
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【单选题】The users request that [F2], [F3], and [F4] be used to commit, rollback, and exit,respectively. How do you accomplish this?（）
A.
Add the appropriate PL/SQL code for each key.
B.
Map the logical keys to the physical keys, then add the appropriate PL/SQL code for each key.
C.
Create an object library to define the key triggers, then reference the object library in the form.
D.
This cannot be accomplished because other function keys provide this functionality by default.
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【单选题】从海图上查得GPS船位修正的说明中有"Latitude 1.’1 Southward.Longitude 0.’4 Westward" 字样。GPS的经、 纬度读数为:30o40.’2S,15o12.5W.则用于海图上定位的数据应为:
A.
30º41.’3S,15º12.’9W
B.
30º41.’2S,15º12.’7W
C.
30º39.’2S,15º2.’3W
D.
30º40.’0S,15º’11.’5W
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【简答题】Read the article’s headings. What are the four ways to define an ? What Is an ? How do you know when a person is an ? Does the person's age tell you? Or is an a person who takes ...
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【单选题】Choose the main idea of the textbook excerpt. What Is an Adult?AgeBodyBrainResponsibilitiesWhat Is an Adult?
A.
Another way to define an adult is by the person's body. An adult is a person who is grown and can have children. This is a physical definition of an adult. According to this definition, a 16-year-old is usually an adult.
B.
A person becomes an adult at age 18.
C.
There are different ways to define an adult.
D.
Teenagers don't always think or act like adults.
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【单选题】常用的曳引轮绳槽有三种型式,但不包括哪种型式。
A.
凹形槽
B.
半圆形
C.
梯形
D.
V 形
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【判断题】配垫时,可随意加两个垫消除轴向间隙。
A.
正确
B.
错误
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【单选题】确诊血友病的检查是（）
A.
血小板聚集试验
B.
凝血活酶生成及纠正试验
C.
D-二聚体测定
D.
毛细血管脆性试验
E.
肾上腺素试验
查看完整题目与答案
【简答题】当执行下面两个语句后,输出的结果为: 运行结果为: __________ 。
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【单选题】听力原文：W: Do you think you can give an exact definition of 'management'，Mr．Rogers? M: Management is the process of achieving results through other people． W: What are the functions of management? M: The...
A.
It is getting things done through other people.
B.
It is helping an organization find the right staff.
C.
It is assembling people of different abilities.
D.
It is communicating between colleagues.
查看完整题目与答案
相关题目：
【单选题】（2013）确诊血友病的检查是
A.
肾上腺素试验
B.
凝血活酶生成及纠正试验
C.
D-二聚体测定
D.
血小板聚集试验
E.
毛细血管脆性试验
查看完整题目与答案
【单选题】The users request that [F2], [F3], and [F4] be used to commit, rollback, and exit,respectively. How do you accomplish this?（）
A.
Add the appropriate PL/SQL code for each key.
B.
Map the logical keys to the physical keys, then add the appropriate PL/SQL code for each key.
C.
Create an object library to define the key triggers, then reference the object library in the form.
D.
This cannot be accomplished because other function keys provide this functionality by default.
查看完整题目与答案
【单选题】从海图上查得GPS船位修正的说明中有"Latitude 1.’1 Southward.Longitude 0.’4 Westward" 字样。GPS的经、 纬度读数为:30o40.’2S,15o12.5W.则用于海图上定位的数据应为:
A.
30º41.’3S,15º12.’9W
B.
30º41.’2S,15º12.’7W
C.
30º39.’2S,15º2.’3W
D.
30º40.’0S,15º’11.’5W
查看完整题目与答案
【简答题】Read the article’s headings. What are the four ways to define an ? What Is an ? How do you know when a person is an ? Does the person's age tell you? Or is an a person who takes ...
查看完整题目与答案
【单选题】Choose the main idea of the textbook excerpt. What Is an Adult?AgeBodyBrainResponsibilitiesWhat Is an Adult?
A.
Another way to define an adult is by the person's body. An adult is a person who is grown and can have children. This is a physical definition of an adult. According to this definition, a 16-year-old is usually an adult.
B.
A person becomes an adult at age 18.
C.
There are different ways to define an adult.
D.
Teenagers don't always think or act like adults.
查看完整题目与答案
【单选题】常用的曳引轮绳槽有三种型式,但不包括哪种型式。
A.
凹形槽
B.
半圆形
C.
梯形
D.
V 形
查看完整题目与答案
【判断题】配垫时,可随意加两个垫消除轴向间隙。
A.
正确
B.
错误
查看完整题目与答案
【单选题】确诊血友病的检查是（）
A.
血小板聚集试验
B.
凝血活酶生成及纠正试验
C.
D-二聚体测定
D.
毛细血管脆性试验
E.
肾上腺素试验
查看完整题目与答案
【简答题】当执行下面两个语句后,输出的结果为: 运行结果为: __________ 。
查看完整题目与答案
【单选题】听力原文：W: Do you think you can give an exact definition of 'management'，Mr．Rogers? M: Management is the process of achieving results through other people． W: What are the functions of management? M: The...
A.
It is getting things done through other people.
B.
It is helping an organization find the right staff.
C.
It is assembling people of different abilities.
D.
It is communicating between colleagues.
查看完整题目与答案