单项选择题

The author says that the powerful computers of today______.

A．are capable of reliably recognizing the shape of an object
B．are close to exhibiting humanlike behavior
C．are not very different in their performance from those of the 50's
D．still cannot communicate with people in a human language
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单项选择题
Which of the following is closest in meaning to the phrase the only game in town (Lines 3-4, Para. 4)
A．The only approach to building an artificially intelligent computer.
B．The only way for them to win a prize in artificial intelligence research.
C．The only area worth studying in computer science.
D．The only game they would like to play in town.
单项选择题
Conrad and his group of AI researchers have been making enormous efforts to______.
A．find a roundabout way to design powerful computers
B．build a computer using a clever network of switches
C．find out how intelligence developed in nature
D．separate the highest and most abstract levels of thought
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