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【单选题】
SQL Server数据库包含的内容有（）A.
只包含数据文件
B.
只包含日志文件
C.
必须同时包含数据文件和日志文件
D.
可以只包含数据文件
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反馈参考答案：
举一反三
【单选题】We can learn from the last paragraph that ______.
A.
it is necessary to obtain as much knowledge as possible
B.
people should make the best use of the information accessible
C.
we should realize the importance of accumulating information
D.
it is of vital importance to acquire needed information efficiently
【单选题】We can learn from the last paragraph that .
A.
it is necessary to obtain as much information as possible
B.
people should make the best use of the information
C.
we should realize the importance of accumulating information
D.
it is of vital importance to acquire needed information efficiently
【简答题】From the refined oil we obtain important products, such as gasoline, ______ , detergents,______, ______ , and perfumes.
【单选题】Which system should be supplied to obtain the best efficiency and lowest emissions?
A.
Lean combustion principle
B.
Fuel oil system
C.
Electrical control system
D.
Electronic control system
【单选题】国防法规规定的 公民的国防义务有:( )的义务、接受国防教育的义务、保护国防设施的义务、( )的义务、支持国防建设协助军事活动的义务。
A.
参加战争、守卫家园
B.
抵御外敌、保家卫国
C.
服兵役、 保守国防秘密
D.
参与国家建设、提出参政建议
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