As a listener, we can just shut our ears when the speaker is not talking about things we are interested in to save more time.

（英译汉）The market here is not as active as last year’s. If you can reduce your price, say, 5%, we can probably conclude the business.

Which statements of the event listener are true A: Multiple listeners can be attached to one component. B: Only one listener can be attached to one component. C: One listener can receive and process the events from multiple components. D: One listener can receive and process the events from only one component.

What does it take to be an active listener? A: Reliable hearing. B: Active thinking and imagination. C: Tremendous concentration and willpower. D: Excellent communication skills.

Anyone who knows just the host name and the listener name can have full control over the listener. They can stop the listener and also obtain detailed information about the listener， database， and the configuration of the application. How would you avoid this scenario？（） A: lock the listener B: hide the listener C: create multiple listeners D: run listener on a remote client E: set a password for the listener F: store listener.ora in a non-default locatio