The 21st century, the era of information dissemination network coming, the demand for information in the information age augments than ever before, mankind will be very easy to get important information through the Internet spread.

• 21世纪的今天已进入了网络传播的信息化时代,信息化时代对信息的需求量空前增大,人类通过网络传播将非常容易地获取到所需要的重要信息。