Good Presentations, and Bad Presentations.

In a good presentation, the presenters

1, pay attention to audience.
2, make use of voice tone.
3, pay attention to their own face or gesture.
4, have confidence.
5, use a joke.

on the other hand,

In a bad presentation, the presenters

1, only think of their selves and do not mind audience.
2, their voice tone is monotone.
3, only stand and do not use gesture.
4, look nervous.
5, boring.