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    　　Many experts complain that media too often take advantage of the science fiction aspects of nanotech（纳米技术）．Reports of nanotech 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-replicating 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 nanotech have made use of such images，calling for a delay on commercial nanotech until regulations are established．They also point to the possible military uses of nanotech．Bill Joy，the cofounder of Sun Microsystems，wrote a Wired magazine essay in 2000 that if nanotech falls into the wrong hands，it could bring danger to society．

    　　Opponents say Mr．Joy is overreacting．“ In a way，calling for bans on research into molecular manufacturing is like calling for 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 nanotech，but in ways the government would regulate any products that could be dangerous．Export controls and certification systems for nanotech companies are examples．US lawmakers have put forth four bills on nanotech research and development．

    1．Eric Drexler in his book predicts a future world with sufficient material，because________．

    [　　]

    A．man-made plants could replace real plants and grow more quickly

    B．plants produced by nanotech 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 of commercial nanotech，critics of nanotech make use of________．

    [　　]

    A．current social problems

    B．science fiction descriptions

    C．disagreements in the scientific community

    D．he fact that no one is doing molecular manufacturing

    3．Opponents of Bill Joy would NOT agree to________．

    [　　]

    A．control nanotech export

    B．ban nanotech research to avoid any possible dangers

    C．put forth bills on nanotech research and development

    D．establish a certification system for nanotech companies

    4．Which of the following statements best summarizes the main idea of the passage？

    [　　]

    A．Nanotech should not be put into wrong use in the military field

    B．The government should regulate products that could be dangerous

    C．Nanotech regulations should be established in spite of the divided opinions

    D．The media should not take advantage of the science fiction aspects of nanotech．

    答案：D;B;B;C
    解析：

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    A Giant Leap for China

    　　A few days ago, he was just Colonel(上校)Yang; few people knew his name or recognized his face．But last Thursday, when he came back to the earth after a 21-hour trip to space, Yang Liwei’s smile was seen across the world above the magic words：“China’s first spaceman”．

    　　The 38-year-old astronaut was sent into space at 9 a. m．Last Wednesday by China’s Shenzhou Ⅴ spacecraft, which orbited the earth 14 times．He landed safely at 6∶23 a. m．The next day, making China the third country successfully send a person into space, after the former Soviet Union and the US．

    　　Yang was satisfied with his job．“I have seen many landing scenes before on video, and I think ours was one of the most successful, ”He said on a special plane to Beijing after landing．Born into an ordinary family in Liaoning Province, he became a pilot in the Chinese Air Force in 1987, spending 1350 hours in the air．He joined the Chinese space programme 11 years later．

    　　While in space, Yang recorded everything he saw as well as showing China’s national flag and the United Nations’ flag to the people watching on TV at home．He also ate a meal of diced chicken and fried rice, before taking a 3-hour nap．The whole project went according to plan, but space exploration is not as easy as it seems．

    　　Anyone who saw the destruction of the US space shuttle Columbia in February this year will know that Yang took a great risk．

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    　　He has spent five years training to become a spaceman．

    　　“I eat all of my meals at the space programme’s dinning room and have never been able to take my son to kindergarten, ”he said．“I’ve never met his teachers．”

    　　But becoming China’s first spaceman has made all the effort worthwhile．

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    　　Officials say the next Shenzhou will be launched by 2005．China also plans to develop spacewalking and a space lab．

    (1)

    What is the main idea of the story?

    [　　]

    A．

    China’s first manned flight．

    B．

    A hero with great courage．

    C．

    The first Chinese man in space．

    D．

    How Yang Liwei became China’s first spaceman．

    (2)

    How long did each of Yang’s orbits take on average?

    [　　]

    A．

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    B．

    1.5 hours．

    C．

    6 hours．

    D．

    The story didn’t mention it．

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    [　　]

    A．

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    B．

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    C．

    To stress how much training he had to do to prepare for the flight．

    D．

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    Why did the writer use “giant leap” in the title?

    [　　]

    A．

    Because the space flight marked China’s great progress in the field of space exploration．

    B．

    Because Neil Armstrong said it was a “giant leap” for mankind when he first set foot on the moon．

    C．

    Because the space flight was a huge success．

    D．

    Both A and B．

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    This passage is most likely to appear in __________．

    [　　]

    A．

    newspaper

    B．

    textbook

    C．

    science magazines

    D．

    biographies(传记)

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    科目：高中英语 来源：必修一导学英语外研版本 外研版 题型：050

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    Still No Free Lunch

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    [　　]

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    [　　]

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    阅读理解

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    [　　]

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