A mosquito can give a message to another mosquito 150 feet away by _____.

A.mosquito

B.flea

C.Midge

D.Gadfly

You can feel it when a mosquito lands on you．

A.Right．

B.Wrong．

C.Doesn’t Say．

A、Aedes albopictus

B、Aedes aegypti

C、Anopheles gambiae

D、Anopheles stephensi

According to the text, which of the following statements is true？

A．It takes the mosquito very short time to suck the blood from you.

B．A lot of blood is needed to produce young mosquitoes.

C．You can feel itch because the mosquito sucks your blood away.

D．The mosquito is still on your body when you feel uncomfortable.

From the passage we know that ______.

A．you will notice at once when a mosquito lands on your body

B．you can feel something different when the mosquito bites you

C．after she bites, you will have an itch (痒) on your body

D．when you felt the itch you can catch the mosquito

The Science that Imitates Nature's Mechanisms

A European industrialist not long ago became very suspicious about American purposes and intentions in certain areas of scientific research. He learned by chance that the United States was signing contracts with scientists in England, France, Italy, Germany, Belgium, Sweden, Uruguay, Chile, Argentina, Australia, and other countries, calling for research into such matters as the function of the frog's eye and the learning ability of the octopus.

It seemed to the industrialist that such studies could not possibly have any practical value. He seriously believed that the United States was employing the foreign scientists to do meaningless work and occupy their time, while American scientists were busy in the really important areas of science. He was unaware of the fact that the United States was spending much more money at home than abroad for similar studies.

Nature does things better than people

Actually, the research he questioned involves a field of science so new that most people have never heard of it. Named bionics in 1960, this science is the study of living creatures, a study in search of principle applicable to engineering. Nature has operated a vast laboratory for two billion years, and bionics probes the secrets of the marvelous "special-purpose" mechanisms that have developed.

Take the frog's eye for example. A frog eats only live insects, and its eye instantly spots a moving fly within reach of its tongue. You can surround a frog with dead (therefore motionless) flies, and it will never know they are there.

If we can completely understand the mechanic of the frog's eye, we can develop a "map reading eye" for missiles and a "pattern--recognition eye" for our basic air defense system called SAGE (semi-automatic ground environment). SAGE is badly overworked. Its international network of radar "EYES" supplies a tremendous mass of unimportant details about meteorites, clouds, flights of ducks, geese, and friendly planes, and it sometimes gets confused. Until we can build a mechanical frog's eye into SAGE, it will remain somewhat inefficient.

Military and civilian uses

The frog's eye holds promise in civilian life, too. For example, at most major airports the airtraffic problem--with 20 million flights per year to handle--has reached a critical stage. We must develop better devices for monitoring and controlling air traffic.

Special-purpose mechanism as exciting as the frog's eye can be found throughout nature. The bat is under study because the bat's sonar is much more efficient than man-made sonar. By bouncing supersonic squeaks off objects around him, the bat flies about with remarkable skills. A bat can fly through a dark room strung with dozens of piano wires and never touch a single wire.

The mosquito is under study because we need to solve the problem of Static that lessens the efficiency of our communications systems. A mosquito, simply by vibrating its wings, can set up a hum that will cut through any interfering noise (man or nature can create loud whistles or thunder, for instance) and give a message to another mosquito 150 feet away.

Electrical system

Theoretically at least we should be able to copy these mechanisms found in nature, for all biological organisms-from mosquito to frog to man--are in part actually electrical systems. The sense organs that "connect" all animals to the outside world are merely transducers--instruments like a microphone, TV camera, or phonograph pickup arm--which convert one form. of energy into another. A microphone, for example, converts sound into electrical signals which are carried to a loudspeaker and converted back into sound waves. Similarly, the nerve cells of a man's ear convert a cry for help into electrical pulses which are sped over his nervous system to the brain. The brain receives the s

A．Y

B．N

C．NG

We can learn from the passage that ______.

A．repellents work in three ways

B．repellents work more than giving off a nasty smell

C．scientists discovered smell is the mosquito's strongest sense

D．scientists have found some practical ways to avoid being bitten by the mosquito

The reason why one would rather be a mosquito than a mute at a party is that ______.

A．conversation, however meaningless, is preferable to silence

B．a mosquito makes more noise than a mute and noise is second nature to man

C．man can achieve identity through noise

D．the qualities of a mosquito are superior to those of a mute

According to the WHO, the organisms carried by mosquitoes __________.

A) are the food for larvae

B) have led to the death of millions of people in the world

C) invade red blood cells first and then destroy major organs

D) can enter a person’s brain through the mosquito’s bite

A．natural mosquito populations do not change

B．scientists have succeeded with birds and mice

C．foreign genes always go where they are required

D．lab-raised mosquitoes will not be resistant to drugs