求一篇英语对话 3个人的 20句左右 主题3G手机
详细要求：
Talking about 3 G mobile phones
In your talking you may refer to the following information:
3 G Mobile phones
What is 3 G mobile phone?
Why is 3 G mobile phone so popular with college students?
What are the disadvantages of 3G mobile phones?
With 3 G mobile phones, you can send text message, make video calls and watch mobile TV.
It’s really powerful. Students think it cute to have a 3 G mobile phone.
But it may distract students’ attention in class. And students using 3 G mobile phones may make a lot of noise in the library and disturb others