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【单选题】
Which of the following is a feature of a unit of work?（）A.
It applies to a single data server.
B.
It is a recoverable sequence of operations.
C.
Its value can be queried from the system catalog tables.
D.
It begins when the application connects to the data server.
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【简答题】简述财政三大职能的含义。
【简答题】人民防空工程的组成按有效空间的防护功能分，可分解为( )和口部。
【单选题】Most troubles likely to occur with marine diesel engine can, if located in time, be remedied with no difficulty and many can be ______ if the engine is maintained with a high sense of responsibility t...
A.
found out
B.
eliminated
C.
avoided
D.
lowered