More and more people are becoming interested in the Internet. They have formed a bad habit. In fact, the bad habit has become a    1   网络综合症). Staying    2   症状)of IAD.  for more than six hours a day    3    working or studying, and feeling very upset from not being able to get online, are the two major symptoms( —Internet Addiction Disorder (IAD
Internet addiction(上瘾) is    4   in China now. A recent research      5 that 42% of Chinese young people get quite interested in the web, while only 18% of Americans feel in the same    6    .