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【多选题】
考虑本地图书馆的一个图书借阅和和跟踪系统,在Sql Server 2008数据库中包含三个表:Member(会员信息),Borrow(借阅记录)和Book(图书信息),要求: 1、 每人可以借阅一或多本书; 2、 每本书一次只能被借给一个人; 3、 图书馆没有的书籍不能被借阅; 要在Borrow和Book表中强制这种数据完整性,下列描述中正确的是()。
A.
Book表中定义Book_id为主键,Borrow表中建立外键并与Book表的Book_id建立引用关系
B.
Borrow表中定义Borrow_id为主键,并对Borrow_id列建立检查约束
C.
为Book表增加一列来记录书是否被借出
D.
Borrow表中定义Book_id为主键,Book表中建立外键并与Borrow表的Book_id建立引用关系
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参考答案：
举一反三
【单选题】设有语句scanf(“%d,%d”,&m,&n);要使m、n的值依次为2,3,正确的输入是:
A.
2⊔3 ↙
B.
2 ，3↙
C.
2 ；3
D.
2 ↙3↙
查看完整题目与答案
【单选题】If there is any doubt as to the proper operation of a radar, which statement is TRUE?
A.
Only a radar expert can determine if the radar is operating.
B.
All radars have indicator lights and alarms to signal improper operation.
C.
A radar range compared to the actual range of a known object can be used to check the operation of the radar.
D.
The radar resolution detector must be energized to check the radar.
查看完整题目与答案
【单选题】下列属于永久性细胞的是
A.
表皮细胞
B.
心肌细胞
C.
肾小管上皮细胞
D.
间皮细胞
E.
肝细胞
查看完整题目与答案
【多选题】下列属于永久性细胞的是
A.
血细胞
B.
神经细胞
C.
心肌细胞
D.
骨骼肌细胞
E.
肝细胞
查看完整题目与答案
【单选题】On Sunday morning, Mother bought a piece of__________at the butcher’s.
A.
Flesh
B.
meat
C.
muscle
D.
Vegetable
查看完整题目与答案
【简答题】Kate’’s ambition to become a nurse _____ from a desire to help others. A. prompted B. promoted C. programmed D. proceeded
查看完整题目与答案
【单选题】If there is any doubt as to the proper operation of a radar, which statement is TRUE?
A.
Only a radar expert can determine if the radar is operating.
B.
A radar range compared to the actual range of a known object can be used to check the operation of the radar.
C.
All radars have indicator lights and alarms to signal improper operation.
D.
The radar resolution detector must be energized to check the radar.
查看完整题目与答案
【单选题】属于韶山8型电力机车牵引装置设计特点的是（）。
A.
结构复杂
B.
大重量
C.
磨损严重
D.
免维护保养
查看完整题目与答案
【单选题】If there is any doubt as to the proper operation of a radar, which statement is TRUE?
A.
A radar range compared to the actual range of a know object can be used to check the operation of the radar.
B.
Only a radar expert can determine if the radar is operating.
C.
The radar resolution detector must be energized to check the radar.
D.
Only a radar expert can determine if the radar is operating.
查看完整题目与答案
【单选题】下列属于永久性细胞的是
A.
肾小管上皮细胞
B.
造血细胞
C.
肝细胞
D.
神经细胞
E.
表皮细胞
查看完整题目与答案
相关题目：
【单选题】设有语句scanf(“%d,%d”,&m,&n);要使m、n的值依次为2,3,正确的输入是:
A.
2⊔3 ↙
B.
2 ，3↙
C.
2 ；3
D.
2 ↙3↙
查看完整题目与答案
【单选题】If there is any doubt as to the proper operation of a radar, which statement is TRUE?
A.
Only a radar expert can determine if the radar is operating.
B.
All radars have indicator lights and alarms to signal improper operation.
C.
A radar range compared to the actual range of a known object can be used to check the operation of the radar.
D.
The radar resolution detector must be energized to check the radar.
查看完整题目与答案
【单选题】下列属于永久性细胞的是
A.
表皮细胞
B.
心肌细胞
C.
肾小管上皮细胞
D.
间皮细胞
E.
肝细胞
查看完整题目与答案
【多选题】下列属于永久性细胞的是
A.
血细胞
B.
神经细胞
C.
心肌细胞
D.
骨骼肌细胞
E.
肝细胞
查看完整题目与答案
【单选题】On Sunday morning, Mother bought a piece of__________at the butcher’s.
A.
Flesh
B.
meat
C.
muscle
D.
Vegetable
查看完整题目与答案
【简答题】Kate’’s ambition to become a nurse _____ from a desire to help others. A. prompted B. promoted C. programmed D. proceeded
查看完整题目与答案
【单选题】If there is any doubt as to the proper operation of a radar, which statement is TRUE?
A.
Only a radar expert can determine if the radar is operating.
B.
A radar range compared to the actual range of a known object can be used to check the operation of the radar.
C.
All radars have indicator lights and alarms to signal improper operation.
D.
The radar resolution detector must be energized to check the radar.
查看完整题目与答案
【单选题】属于韶山8型电力机车牵引装置设计特点的是（）。
A.
结构复杂
B.
大重量
C.
磨损严重
D.
免维护保养
查看完整题目与答案
【单选题】If there is any doubt as to the proper operation of a radar, which statement is TRUE?
A.
A radar range compared to the actual range of a know object can be used to check the operation of the radar.
B.
Only a radar expert can determine if the radar is operating.
C.
The radar resolution detector must be energized to check the radar.
D.
Only a radar expert can determine if the radar is operating.
查看完整题目与答案
【单选题】下列属于永久性细胞的是
A.
肾小管上皮细胞
B.
造血细胞
C.
肝细胞
D.
神经细胞
E.
表皮细胞
查看完整题目与答案
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