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    　　In the dark night of the desert a group of US Air Force scientists is testing a new device (设备) for guiding a missile(导弹) to its target. Designed to seek out the heat of an enemy aircraft engine, it is now going through its paces by tracing(跟踪)the movement of a flashlight waving thirty feet away in the darkness. A hundred yards away, unseen by the man, a rattlesnake sliding between the stones senses a patch of warmth. Although the snake's mechanism(机制) is small enough to be packed into a head the size of a nut, it can detect a change in temperature of one thousandth of a degree. Without a sound the snake closes in and strikes for the kill.

    　　Whenever we look in the animal world we find the same story. Almost anything that man can do, nature has already done better. So, for the purpose of learning from nature, a new science called bionics has grown up. Its aim is to find out how animal's instruments work so that man can copy them for his own use.

    　　Imagine being able to know a friend several miles off by his smell. Male silk moths(蛾)can do this. Their antennae(触角)are so sensitive to the chemical odor of female that they can detect their presence by picking up only one molecule (分子) of the chemical. Even with their most sensitive instruments, human cannot approach this perfection.

    　　Studying beetle's(甲虫的)eyes has already paid off. A group of scientists in Germany found that a beetle can accurately(精确地) measure with its eyes the speed of a moving background．After finding out how a beetle accomplishes this scientists built a machine that operated on the same principle(原理). This instrument is able to determine the ground speed of moving aircraft with a high degree of accuracy.

    (1)The writer compares the rattlesnake with a missile in order to ________.

    [　　]

    A．show the deadliness of the missile

    B．demonstrate(论证)what bionics is

    C．show that man is wiser than nature

    D．demonstrate that a rattlesnake is very dangerous

    (2)Study of the male silk moth might lead to a new method of ________.

    [　　]

    A．locating underground streams

    B．making smooth cloth

    C．detecting poisonous gas

    D．communicating

    (3)Which of the following can be used to replace the underlined word“accomplishes”?

    [　　]

    A．Succeeds in.
    B．Completes.
    C．Does
    D．Reaches.

    (4)Which of the following is NOT right

    [　　]

    A．Studying the eye of the beetle has helped scientists to measure speed of objects.

    B．Male moths can know female moths several miles off by their smell.

    C．Devices of animals discussed here serve a purpose similar to the skin of the human.

    D．The military uses of bionics are one reason for developing this science.

    (5)According to the passage, the goal for bionics is to ________.

    [　　]

    A．explain how animal devices work

    B．copy animal processes with man-made machines

    C．prove the usefulness of this science

    D．apply(应用) science to the study of electronics

    答案：B;C;A;C;B
    解析：

    (1) B 第二段中讲“几乎人类能做的某件事，自然界早已都做得很好了”.所以可以用响尾蛇与导弹做类比，这一新科学领域被称为bionics，所以选B项.A项“显示导弹的致命力”、C项“显示人类比自然界聪明”、D项“论证响尾蛇很危险”都不正确.

    (2) C 文章第三段中引用了蛾子的例子说明人类可以根据其原理测定有毒气体，所以选C项.A项“确定地下暗流”、B项“生产平滑的布匹”、C项“交流”都不合题意.

    (3) A 第四段讲研究出甲虫如何完成这一任务，科学家便可依此制造一个机器.只有A项“成功完成这一任务”与题意相符.

    (4) C 根据第四段可判定A项“研究甲虫的眼睛有助于科学家测量物体的速度”是正确的.根据第三段可推知B项“雄性蛾子可以通过气味确定数里之外有雌性蛾子的位置”正确.文中说研究这一领域可以用于军事目的，所以D项也正确，只有C项“这里讨论的动物的器官与人类的皮肤作用相同”不正确.

    (5) B 根据第二段最后一句“其目的在于通过研究动物如何使用这些工具，而从使人类可以为自身利益复制这种工具”可知B正确.C项“证明这一种学分类的有用性”、D项“应用科学研究电子仪器”都不符合原文意思.


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