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推荐文章：1997年6月大学英语四级考试试题听
推荐文章简介：
Section A 1. M: Boating and Skating are my favorite sports. W: I like swimming, but not boating or skating. Q: Which sport does the woman like? 2. W: Have you finished reading my research report. I pu
programs
C) the aspirations of scientists to duplicate the intelligence of a ten-month-old child
D) the efforts made by scientists in the study of the similarities between transistors and
brain cells
28.Conrad and his group of AI researchers have&nbs
p;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
29.What’s the author’s opinion about the new AI movement
A) It has created a sensation among artificial intelligence researchers but will soon die
out.
B) It’s a breakthrough in duplicating human thought processes.
C) It’s more like a peculiar game rather than a real scientific effort.
D) It may prove to be in the right direction though nobody is sure of its future prospects.
30.Which of the following is closest in meaning to the phrase the only game in town (Line 3,
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&nbs
p;in town.
Passage Three
Question 31 to 35 are based on the following passage
Cars account for half the oil consumed in the U.S., about half the urban pollution and one fourth the greenhouse (温室) gases. They take a similar oll of (损耗) resources in other industrial nations and in the cities of the developing world . As vehicle use continues to increase in the coming decade, the U.S. and other countries will have to deal with these issues or else face unacceptable economic , health-related and political costs. It is unlikely that oil prices will remain at their current low level or that other nations will accept a large and growing U.S. contribution to global climatic change.
Policymakers and industry have four options reduce vehicle use, increase the efficiency and reduce the emissions of conventional gasoline-powered vehicles, switch to less harmful fuels, or find less polluting driving systems. The last of these-in particular the introduction of vehicles powered by electricity — is ultimately the only sustainable option. The other alternatives are attractive in the
ory but in practice are either impractical or offer only marginal improvements. For example, reduced vehicle use could solve traffic problems and a host of social and environmental problems, but evidence from around the world suggests t hat it is very difficult to make people give up their cars to any significant ex tent. In the U.S., mass-transit ridership and carpooling (合伙用车） have decline d since World War II. Even in western Europe, with fuel prices averaging more than $ 1 a liter (about $ 4 a gallon) and with easily accessible mass transit and dense populations, cars still account for 80 percent of all passenger travel.
Improved energy efficiency is also appealing, but automotive fuel economy has barely made any progress in 10 years. Alternative fuels such as natural gas, burned in internal-combustion engines, could be introduced at relatively low cost, but they would lead to only marginal reductions in pollution and greenhouse emissions (especially because oil companies are already spending billions of dollars every year to develop less polluting types of gasoline).
31.From the&
nbsp;passage we know that the increased use of cars will ______.
A) consume half of the oil produced in the world
B) have serious consequences for the well-being of all nations
C) widen the gap between the developed and developing countries
D) impose an intolerable economic burden on residents of large cities
32.The U.S. has to deal with the problems arising from vehicle use because ______.
A. most Americans are reluctant to switch to public transportation systems
B) the present level of oil prices is considered unacceptable
C) other countries will protest its increasing greenhouse emissions
D) it should take a lead in conserving natural resources
33.Which of the following is the best solution to the&上一页 [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] ... 下一页 >> |
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