【单选题】【消耗次数：1】
Thereasoniswhyhefailedis_______hewastoocareless.
①
because
②
that
③
for
④
becauseof
参考答案：
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相关题目
【单选题】
Everybody likes her because she is always _______ .
①
Everybody likes her because she is always _______ .
②
cheerful
③
sad
④
selfish
【单选题】
They are living with their parents for the moment because their own house __________.
①
is being rebuilt
②
has been rebuilt
③
is rebuilt
④
has rebuilt
【单选题】
____ of them knew about the plan because it was a secret.
①
Some
②
Any
③
No one
④
None
【单选题】
The electric fan does not work because of the ____ of service.
①
pause
②
break
③
interruption
④
breakdown
【单选题】
The electric fan does not work because of the _____of service.
①
pause
②
break
③
interruption
④
breakdown
【单选题】
You can take as many as you like because they are free of ____ .?
①
fare ?
②
charge ?
③
money ?
④
pay?
【单选题】
I am unhappy because she accepted my invitation _______ .
①
passively
②
extremely
③
undoubtedly
④
unwillingly
【单选题】
I won’t be able to attend the meeting tonight because _________ .
①
I must teach a class
②
I teach a class
③
I will be teaching a class
④
I will have been teaching a class
【单选题】
This machine is extremely （ ） because it runs on half-price electricity.
①
economic
②
economical
③
economy
④
economist
【单选题】
You can take as many as you like because these handouts are free of ____.
①
fare
②
charge
③
money
④
pay
随机题目
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简述冒泡排序的基本思想，并用C语言写出关键步骤算法（例如：通过键盘随机输入8个整数，并对这8个数据按照从大到小排序）。
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简述概念模型向逻辑模型转换的转换规则
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若关系模式R∈1NF，且每一个非主属性完全函数依赖于码，则称R∈[填空]。
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SQL中，表有三种： [填空]、临时表(虚表)和基本表。
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取出关系中的某些列，并消去重复的元组的关系运算称为[填空]。
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在冲突可串行化调度中，冲突的操作包括不同事务对同一个数据的[填空]操作和读写操作。
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删除基本表用[填空]语句。
【多选题】
在数据库中，概念模型的相关表述不正确的是？
①
用于现实的建模，与具体的DBMS有关
②
用于信息世界的建模，与具体的DBMS有关
③
用于现实的建模，与具体的DBMS无关
④
用于信息世界的建模，与具体的DBMS无关