Who is smarter，human being or artificial intelligence（AI，人工智能）？The question swept the world a few months ago．In March 2016，AlphaGo，an AI program developed by Google，had the Go（围棋） match with Lee Sedol，a South Korean Go player．He is the world top player of this old Chinese game．

In October 2015，AlphaGo became the first computer program to beat a professional（职业的） human Go player．And this time，it beat Lee Sedol 4﹣1．

In fact，before the match，most people believed that Lee would certainly be the winner，because they didn't think that AI was good enough to beat the human mind．However，the result was disappointing．As a machine，AlphaGo would never get tired，while Lee Sedol was only a human and humans must have some weaknesses．

AlphaGo's wins over a human champion（冠军） show that computers can do more difficult tasks．Some people may worry whether computers are now smart enough to beat us at everything．But scientists say that is not the case．Real life problems can be more difficult than the Go game．Thomas Johnson，a scientist of AI said，"It's not hard to get a computer program to remember and produce facts．What is hard is getting computers to use knowledge in everyday situation．"We believe we can use the technology of AI to improve the world．

45．The match between AlphaGo and Lee Sedol is mentioned at the beginning of the article mainly to　　．

A．get the reader to think about AI

B．draw the reader's attention to AlphaGo

C．show how AI is usually tested

D．tell the reader AI has over the human brain

46．What was the result of the match？　　

A．Google program beat AlphaGo．

B．Lee Sedol won AlphaGo 4﹣1．

C．Lee Sedol was beaten．

D．Neither side won the match．

47．﹣Why did most people believe Lee would be the winner？

﹣Because　　．

A．computers had weaknesses and also got tired

B．AlphaGo only beat a human Go player once

C．the Go game was invented by Chinese people

D．computers were not so smart as a human

48．What does Thomas Johnson probably agree with？　　

A．AI does better than humans in every situation．

B．It's hard for AI to beat the human at everything．

C．The development of AI could be harmful one day．

D．AI should be used to help us make difficult decisions．