单项选择题

哪个不是JDBC用到的接口和类？（）

A.System
B.Class
C.Connection
D.ResultSet

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单项选择题

A.serializable < repeatable read
B.repeatable read < read committed
C.repeatable read >read committed
D.read committed < read uncommitted

单项选择题

A.serializable
B.repeatable read
C.read committed
D.read uncommitted