一个关于世博会的presentation

Making a good oral presentation is an art that involves attention to the needs of your audience, careful planning, and attention to delivery. This page explains some of the basics of effective oral presentation. It also covers use of notes, visual aids and computer presentation software.
The audience
Some basic questions to ask about an audience are:
1.Who will I be speaking to?
2.What do they know about my topic already?
3.What will they want to know about my topic?
4.What do I want them to know by the end of my talk?
By basing the content and style of your presentation on your answers to these questions, you can make sure that you are in tune with your audience. What you want to say about your topic may be much less important than what your audience wants to hear about it.
Planning your presentation
In an effective presentation, the content and structure are adjusted to the medium of speech. When listening, we cannot go back ov