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You plan to use static database registration for a new listener when you create it.What could be the two reasons for this？（）
A:More than one database is to be registered with the listener.
B:The users will connect the database by using the host naming method.
C:The Oracle Enterprise Manager is to be used to monitor an Oracle9i database.
D:The database that is to be registered with the listener is configured in shared server mode.
E:The listener is not configured on the default port of 1521 and the instance is not configured to register with a nondefault port.

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出自：Oracle认证

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