阅读理解 In the dark night of the desert a group of US Air Force scientists is testi

阅读理解

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 ________.

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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 ________.

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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”?

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A．Succeeds in.B．Completes.C．DoesD．Reaches.

(4)Which of the following is NOT right

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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 ________.

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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

试题答案

答案：B;C;A;C;B