A.Limit the speed of the Internet services.
B.Sacrifice things such as school and family.
C.Spend more and more time online.
D.Care much for the young and improve their ability to get along with others.
19.We can conclude from the passage that ________.
A.the demand for online services continues to grow
B.China is fighting a battle against online games
C.the problems caused by online games don't just exist in Korea
D.in the year 2004 there were a total of 13.8 million Chinese visiting the Internet
20.What's the best title for the passage?
A.Internet problems
B.Addiction to online games
C.Problem people in the world
D.Online games can control people
B
Since the 1970s, scientists have been searching for ways to link the brain with computers. Brain-computer interface(BCI) technology could help people with disabilities send commands to machines.two researchers, Jose Millan and Michele Tavella from the Federal Polytechnic School in Lausanne, Switzerland, demonstrated(展示) a small robotic wheelchair directed by a person's thoughts.Tavella operated the wheelchair just by thinking about moving his left or right hand. He could even talk as he watched the vehicle and guided it with his thoughts.
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