单选题Which of the following is a feature of a unit of work?（）AIt applies to a single data server.BIt is a recoverable sequence of operations.CIts value can be queried from the system catalog tables.DIt begins when the application connects to the data server.
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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