The first two went round a comer. Suddenly the gentleman saw a piece of paper on the ground. He picked it up, it was five pounds. A few seconds later, the girl came back, crying. She said, "I've dropped five pounds".
"Don't cry", said the gentleman, "Here it is". The girl thanked him and went away. After a few seconds, the big man came back, he was looking for something. Suddenly a small man opened a window and said, "I saw five pounds fall from your pocket, but that man gave it to a girl". The big man was very angry. The gentleman was frightened and gave him another five pounds. When the gentleman had gone, the girl came back to receive her one pound sixty-seven pence and the small man came out to get his.
Who do you think really lost five pounds?
A.The gentleman.
B.The small man.
C.The big man.
D.The pretty girl.
第4题
(54)下列关于关系模式规范化的叙述中,哪一条是不正确的?
A)若 R ? 4NF,则必然 R ? 3NF
B)若 R ? 3NF,则必然 R ? 2NF
C)若 R ? 2NF,则必然 R ? 1NF
D)若 R ? 1NF,则必然 R ? BCNF
第5题
下列关于域名和IP地址的叙述中,哪一条是不正确的?
A)在Internet中访问一台主机必须使用它的主机名
B)200.201.202.203是一个C类IP地址
C)IP地址采用的是分层结构
D)主机名与IP地址是一对应的
第7题
(9)下列关于数据运算的叙述中,哪一条是不正确的?
A)数据运算是数据结构的一个重要方面
B)数据运算的具体实现在数据的逻辑结构上进行
C)检索是一种常用的运算
D)插入是一种常用的运算
第9题
(44 )下列关于索引的叙述中,哪一条是不正确的?
A) 顺序索引能有效地支持点查询
B) 顺序索引能有效地支持范围查询
C) 散列索引能有效地支持点查询
D) 散列索引能有效地支持范围查询
第10题
下列关于时钟的叙述中,哪一条是不正确的?()
A) 时钟中断可以屏蔽
B) 时钟是操作系统运行的必要机制
C) 时钟可以分成硬件时钟和软件时钟
D) 利用时钟中断可以实现进程的轮转运行
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