2．Social networks are considered to be Web 2.0.What does this mean？To understand this，it's important to understand what the original web did (often called Web 1.0)．

　　3．Back in the nineties，the Internet was a place to go to read articles，listen to music，get information，etc.Most people didn't write anything on the sites.They just looked through the sites and took advantage of the information or resources provided.Of course，some people did create their own sites.However，________ was difficult.You needed to know the original language the Internet used.It certainly wasn't something most people wanted to do as it could take hours to get a basic page just right.Things began to get easier when blogs were introduced.With blogs，many more people began writing posts，as well as commenting on other people's blogs.

　　4．In 2003 a site named MySpace took the Internet by storm.It was trying to imitate the most popular features of Friendster，the first social networking site.It quickly became popular among young users.Soon everyone was trying to develop a social networking site. The sites didn't provide content to people；they helped people create，communicate and share what they loved including music，images_and_videos.

　　5．Relying on the desire of users to communicate with each other is the key to the success of Web 2.0 companies.

　　1．What is the main idea of the text？(no more than10 words)

【高考一轮复习学案人教版必修四《Unit 3 A taste of English humour》】相关文章：

★ 【人教版】2014届高考英语一轮复习指导考点针对练：必修5 unit1《Great scientists》

★ 2014届高考英语一轮复习课时作业(二十八)必修5Module 4《Carnival》（外研版）

★ 【浙江专用】2014届高考英语一轮复习课时作业(二十三)必修5Unit 3《Life in the future》

★ 【北京专用】2014届高考英语一轮复习方案课时作业：必修5 Unit 3 Life in the future

★ 【浙江专用】2014届高考英语一轮复习课时作业(三十六)选修8Unit 1《A land of diversity》

★ 【浙江专用】2014届高考英语一轮复习课时作业(二)必修1Unit 2《English around the world》

★ 【浙江专用】2014届高考英语一轮复习课时作业(四)必修1Unit 4《Earthquakes》

★ 2014届高考英语一轮复习课时作业(四十六)选修8Module 4《Which English？》（外研版）

★ 2014届高考英语一轮复习课时作业(十七)必修3Module 5《Great People and Great Inventions of Ancient China》（外研版）

★ 【浙江专用】2014届高考英语一轮复习课时作业(七)必修2Unit 2《The Olympic Games》