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  3. In the 1920s, the pioneers of artificial intelligence (AI) predicted that, by the end of this century, computers would be conver

In the 1920s, the pioneers of artificial intelligence (AI) predicted that, by the end of this century, computers would be conver

admin2012-01-05  35
问题    In the 1920s, the pioneers of artificial intelligence (AI) predicted that, by the end of this century, computers would be conversing with us at work and robots would be performing our housework. But as useful as computers are, they are nowhere close to achieving anything remotely resembling these early aspirations for humanlike behavior. Never mind something as complex as conversation: the most powerful computers struggle to reliably recognize the shape of an object, the most elementary of tasks for a ten-month-old kid.
   A growing group of AI researchers think they know where the field went wrong. The problem, the scientists say, is that AI has been trying to separate the highest, most abstract levels of thought, like language and mathematics, and to duplicate them with logical, step-by-step programs. A new movement in AI, on the other hand, takes a closer look at the more roundabout way in which nature came up with intelligence. Many of these researchers study evolution and natural adaptation instead of formal logic and conventional programs. Rather than digital computers and transistors, some want to work with brain cells and proteins. The results of these early efforts are as promising as they are peculiar, and the new nature-based AL movement is slowly but surely moving to the forefront of the field.
   Imitating the brain’s neural network is a huge step in the right direction, says computer scientist and biophysicist Michael Conrad, but it still missed an important aspect of natural intelligence. "People tend to treat brain as if it were made up of color-coded transistors. " He explains, "But it’s not simply a clever network of switches. There are lots of important things going on inside the brain cells themselves." Specifically, Conrad believes that many of the brains’ capabilities stem from the pattern-recognition proficiency of the individual molecules that make up each brain cell. The best way to build an artificially intelligent device, he claims, would be to build around the same sort of molecular skills.
   Right now, the notion that conventional computers and software are fundamentally incapable of matching the processes that take place in the brain remains controversial. But if it proves true, then the efforts of Conrad and his fellow AI rebels could turn out to be the only game in town.
The author says that the powerful computer of today ______.
选项 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 human language
答案D
解析 第一段，作者谈到，在1920s，有人预测本世纪末computers would be conversing with us“电脑将能够与人类交谈”，随后作者指出，虽然电脑十分有用，但they are nowhere close to achieving anything remotely resembling these early aspirations for humanlike behavior“它们无法实现早期提出的模仿人类行为这一伟大渴望”，紧接着作者谈到 Never mind something as complex as conversation“更别说做诸如交谈这样复杂的事情了”，由此可判断，电脑仍然无法用人类语言同人类进行交谈，选项D正确；第一段结尾部分，作者提到the most powerful computers struggle to reliably recognize“最先进的电脑挣扎着(试图)识别物体形状”，并不是说它capable of realizing“能够识别”，选项A不正确。
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