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【单选题】
当前大部分数据库系统，被称为结构化数据库，其核心数据模型是关系模型，因此“关系”是数据库领域的重要概念。围绕“关系”，回答问题：表（Table）也称关系（Relation）。关于“表”的叙述，不正确的是_____。A.
被称为关系的 “表”中可以有一列包含几个子列的情况，例如“地址”列，包含了“省份”和“详细地址”两个子列
B.
一个“表”是指由三部分内容组成的整体： 表名、列名集合 ( 表的格式 ) 及的集合 ( 由值构成的组合 — ，由值构成的行的集合 )
C.
“表”和“关系”是有细微差别的：关系不能有相重复的，而表并不一定有此限制
D.
“表”中数据具有行位置无关性和列位置无关性
E.
其它三个选项说法有不正确的
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【单选题】Steamboat decks teemed not only with themain current of pioneeringhumanity, but its flotsam ofhustlers, gamblers, and thugs as well. (Para. 5)What kind of figure of speech has been usedin this sentenc...
A.
alliteration
B.
zeugma
C.
hyperbole
D.
simile
【单选题】Steamboat decks teemed not only with the main current of pioneering humanity, but its flotsam of hustlers, gamblers, and thugs as well. (Para. 5)
A.
Steamboat decks were filled with people of pioneering spirit and also criminals floating on the sea, such as hustlers, gamblers and thugs.
B.
Steamboat decks were filled with people of pioneering spirit and also criminals or social outcasts such as hustlers, gamblers and thugs.
【简答题】Steamboat decks ______ not only with the main current of pioneering humanity, but...
【单选题】（）hasn’t ’tween decks.
A.
A bulk carrier
B.
A container ship
C.
A general cargo ship
D.
A +B
【单选题】What is the rhetoric device used in the sentence “Steamboat decks teemed not only with the main current of pioneering humanity, but its flotsam of hustlers, gamblers, and thugs as well”?
A.
zeugma
B.
syllepsis
C.
pun
D.
hyperbole
【简答题】When did the steamboat 'New Orleans' make its first trip? In ______.
【单选题】(During) the holidays, (every) train and (steamboat) (were) crowded.
A.
During
B.
every
C.
steamboat
D.
were
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