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Examine the following set of RMAN commands: Which statement is true when the RMAN RUN block Is executed?（）
A:The execution of the script fails because multiple channels cannot coexist.
B:The script is executed and both the channels are used for the script execution.
C:The new channel, CHI, is Ignored because a channel has been configured already.
D:ration parameter DC1 is overridden because a new channel is allocated in RMAN RUN block.

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出自：Oracle认证

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