题目内容
阅读理解
Many experts complain that media too often take advantage of the science fiction(幻想) aspects of nanotechnology(纳米技术). Reports of nanotechnology often refer to K. Eric Drexler's book Engines of Creations, which predicts an age full of dominant molecular(分子的) manufacturing and a world without material scarcity. Whatever humans need will one day be built cheaply with microscopic self－replicating machines(微细自我复制机) that put atoms together to create copies of anything alive in the world－from trees to human bodies.
In fact, the scientific community is deeply divided over whether self－replicating machines are possible. If they are, major dangers could exist. Mr Drexler himself thought that self－repli－cating machines could probably go out of control. He writes in his book that man－made
“plants” with “leaves no more efficient than today's solar cells could win over real plants, crowding the earth with leaves that are not suitable to be eaten. Tough bacteria' could be more competitive than the real bacteria: They could spread everywhere, replicate swiftly, and reduce the earth to dust in a matter of days.”
Critics of nanotechnology have made use of such images, calling for a delay on commercial nanotechnology until regulations are established(建立规则). They also point to the possible military(军事的) uses of nanotechnology. Bill Joy, the cofounder of Sun Microsystems, wrote in a Wired magazine essay in 2000 that if nanotechnology falls into the wrong hands, it could bring dangers to society.
Opponents(反对者) say Mr Joy is overreacting. “In a way, calling for bans(禁止) on research into molecular manufacturing is like calling for a delay on faster－than－light travel because no one is doing it,” says Glenn Reynolds, a University of Tennessee law professor.
Professor Reynolds says it is a good idea to regulate nanotechnology, but in ways the government would regulate any products that could be dangerous. Export controls and certification systems for nanotechnology companies are examples. US lawmakers have put forth four bills(法令) on nanotechnology research and development.
1．K. Eric Drexler in his book predicts a future world with sufficient material, because ________.
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A．man－made plants could replace real plants and grow more quickly
B．plants produced by nanotechnology would be as efficient as today' s solar cells
C．man－made bacteria would be widespread and capable of self－replicating
D．humans could create copies of anything alive with high technology
2．To call for a delay on commercial nanotechnology, critics of nanotechnology make use of ________.
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A．current social problems
B．science fiction descriptions
C．disagreements in the scientific community
D．the fact that no one is doing molecular manufacturing
3．Opponents of Bill Joy would NOT agree to ________.
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A．control nanotechnology export
B．ban nanotechnology research to avoid any possible dangers
C．put forth four bills on nanotechnology research and development
D．establish a certification system for nanotechnology companies
4．Which of the following statements best summarizes the main idea of the passage?
[ ]
A．Nanotechnology should not be put into wrong use in the military field.
B．The government should regulate products that could be dangerous.
C．Nanotechnology regulations should be established in spite of the divided opinions.
D．The media should not take advantage of the science fiction aspects of nanotechnology.
解析：
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1．不仅植物、动物也可以人工制造，所以A、B错误；第一段最后说from trees to human bodies，所以D正确。 2．文章第一句即指出Many experts complain that media too often take advantage of the science fiction aspects of nanotechnology，第三段也提到make use of such images。 4．最后一段即是对本文的总结，Professor Reynolds says it's a good idea to regulate nanotechnology，而且US lawmakers have put forth four bills… |
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