In the 1950s, 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’ re 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 tenmonth-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
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
更多"{{B}}第三篇{{/B}}
In the 1"的相关试题:
[单项选择]{{B}}第三篇{{/B}}
In the 1950s, 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’ re 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 tenmonth-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
A. the shift of the focus of study on to the recognition of the shapes of objects
B. the belief that human intelligence cannot be duplicated with logical, step-by-step programs
C. the aspirations of scientists to duplicate the intelligence of a ten-month-old child
D. the efforts made by scientist in the study of the similarities between transistors and brain cells
[单项选择]第三篇
Water
The second most important constituent (构成成份) of the biosphere (生物圈) is liquid water. This can only exist in a very narrow range of temperatures, since water freezes at 0℃ and boils at 100℃. Life as we know it would only be possible on the surface of a planet which had temperatures somewhere within this narrow range.
The earth’s supply of water probably remains fairly constant in quantity. The total quantity of water is not known very accurately, but it is about enough to cover the surface of the globe to a depth of about two and three-quarter kilometers. Most of it is in the form of the salt water of the oceans about 97 percent. The rest is fresh, but three quarters of this is in the form of ice at the Poles and on mountains, and cannot be used by living systems until melted. Of the remaining fractional which is somewhat less than one per cent of the whole, there is 10—20 times as much stored underground water as t
A. in the center of the earth.
B. on the surface of our planet.
C. in a very narrow range of temperatures.
D. in the coastal areas of the earth.
[单项选择]{{B}}第三篇{{/B}}
{{B}}Giving Up
Smoking{{/B}}
A number of devices are available to help a person
quit smoking. Nicotine (尼古丁) patches are small, nicotine-containing adhesive
(粘着性的) discs applied to the skin. The nicotine is slowly absorbed through the
skin and enters the bloodstream (血流). Over time, the nicotine dose is reduced
and eventually the desire for nicotine is eased. Nicotine gum (口香糖) works in a
similar manner, providing small doses of nicotine when chewed (咀嚼).
The benefits of giving up smoking include the immediate reduction of harm
to the health of the smoker and easier admission to social activities and
institutions that ban smoking. In a 1988 report, the U.S. Surgeon General
declared cigarette smoking to be more harmful and expensive than the use of
cocaine (可卡因), alcohol
A. Consuming alcohol.
B. Using heroin.
C. Taking cocaine.
D. Smoking cigarettes.
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