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Hearing problems may be alleviated by changes in diet and exercise habits.A．removedB．curedC．worsenedD．relieved 03-12
Paragraph 6 ______ 04-01
But in the end he approved of our proposal.A．undoubtedlyB．certainlyC．ultimatelyD．necessarily 03-12
Which one of the following is NOT the reason for an overall lack of teaching Darwin's theory?A．Teaching of creationism diminishes teaching of evolution.B．Teachers are not required to teach Darwin's theory.C．teachers often leave out the teaching of evolution.D．Darwin's theory is denied as the central theory of biology. 04-01
Paragraph 4 ______ 04-01
According to Weis in the 5th paragraph, the theory of evolution ______.A．is fundamental to the development of modem genetics, molecular biology and geonomicsB．is a political issueC．is based on genetics, molecular biology and geonomicsD．has increased our understanding of human health 02-07
As early as the 6th century, Irish fishermen started raising dolphins in the Shannon estuary.A．RightB．WrongC．Not mentioned 04-01
To make electrochromic windows change color, what is applied to the window glass?A．Electricity.B．Tungsten oxide.C．A battery.D．A voltage. 01-28
John is collaborating with mary in writing an article.A．cooperatingB．competingC．combiningD．arguing 04-01
The food is insufficient for three people.A．instantB．infiniteC．inexpensiveD．inadequate 04-01
Crashed Cars to Text Message for HelpThere is no good place to have a car crash -- but some places are worse than others. In a foreign country, for instance,【51】 to explain via cellphone that you are upside down in a ditch (沟渠) when you cannot speak the local language can fatally (~) delay the arrival of the emergency services.But an answer may be at hand. Researchers funded by the European Commission are beginning tests of a system called E-merge that【52】senses when a ear has crashed and sends a text message, telling emergency services in the local language that the accident has taken place.The system was【53】 by ERTICO, a transport research organization based in Brussels. Belgium. Cars are fitted with a eellphone-sized device attached【54】 the underside of the dashboard (仪表板) which is activated by the same sensor that triggers the airbag in a crash. The device【55】 a cellphone circuit, a GPS positioning unit and a microphone and loudspeaker.It registers the severity of the crash by【56】 the deceleration data from the airbag's sensor. Using GPS information, it works out which country the Car is in, and from this it determines【57】 which language to compose an alert message detailing precise location of the accident.The device then automatically makes a call to the local emergency services【58】. If the car's occupants are conscious, they can communicate with the operator【59】 the speaker and microphone.E-merge also transmits the vehicles make, model, color and license number, and its heading' when it crashed, which in rum indicates on which side of a multi-lane highway it ended up.This【60】 the emergency services find the vehicle as soon as they arrive on the scene. "We can waste a large【61】time searching for an incident, "says Jim Hammond, a(an)【62】in vehicle technology at the Association of Chief Police Officers in the UK. Tests will begin soon with police car fleets in the UK. Trials have already started in Germany, Sweden, Spain, the Netherlands and Italy.In-car systems that summon (召集) the emergency services after a crash have【63】been fitted in some premium cars". ERTICO says that【64】EU states "are willing to fund the necessary infrastructure (基础结构), E--merge could be working by 2008.A study by French car maker Renault" concluded that the system could save up to 6000 of the 40,000 lives lost each year on Europe's roads, and prevent a similar number of serious injuries.The Renault study estimates that fitting E-merge to every car in Europe would eventually save around 150 billion per【65】in terms of reduced costs to health services and insurance companies, and fewer lost working days.(51)A．tryB．triedC．tryingD．having tried 04-01
What will be the benefit if the research on smart windows turns out to be successful, according to the last paragraph?A．The buildings will look different.B．Windows can be as large as you want.C．We may not need air conditioners any more.D．They are less expensive than traditional windows. 04-01
Electromagnetic EnergyWhite light seems to be a combination of all colors. The energy that comes from a source of light is not limited to the kind of energy you can see. Heat is given off by a flame or an electric light. On a cloudy day it is possible to get a sunburn even though you feel cool. Visible light and the kind of energy that produce warmth and sunburn are examples of electromagnetic energy.The sun is 93 million miles from the earth. Yet we can use energy from the sun because electromagnetic energy travels through space.Many other kinds of energy are also types of electromagnetic energy. Radio, television, and radar signals travel from transmitters to receivers as low-energy electromagnetic waves. Infrared (红外线的) radiation is an electromagnetic wave. When it is absorbed by matter, heat is produced. Waves of infrared and visible light have more energy than waves of radio, television, or radar. Ultraviolet rays (紫外线) and X-rays are electromagnetic waves with even greater amounts of energy. Infrared radiation is used in cooking food and heating buildings. Sunlight and electric lights are part of our requirements for normal living. Ultraviolet radiation is useful in killing certain disease organisms. X-rays and gamma rays have so mush energy that they travel right through solid objects. They can be used to detect and treat cancer. X-rays are used in industry to find hidden cracks in metal, and in medicine to reveal broken bones.Usually we use electricity to generate electromagnetic energy. The source of most of our energy is the sun. Heat from the sun causes water to evaporate. When the water falls to the earth as rain, some of it is trapped behind dams and then used to operate electric generators. Other generators are powered by coal, but the energy stored in coal came from the sun, too.Until recently, the source of the tremendous amount of energy given off by the sun was a puzzle. If the sun depended on chemical reactions, it would have used up all its energy long ago. Experiments with electromagnetic radiation led to the theory that mass can be converted into energy. About forty years after the theory was proposed, nuclear energy was harnessed (利用) by man. Chemical energy comes from electron (电子) rearrangement. Nuclear energy comes from a change in the nucleus of an atom. Compared with chemical reactions, nuclear reactions release millions of times more energy per pound of fuel. We now believe that the sun's energy comes from the nuclear reactions in which hydrogen is changed into helium(氦).Nuclear energy is beginning to compete with coal as an economical source of power to generate electricity. It is also being used to operate engines in large ships. Scientists continue to seek new and better methods of obtaining and using energy.A. Nuclear Reactions as the Lasting Source of the Sun's EnergyB. The Most Important Source of EnergyC. Types of Electromagnetic EnergyD. X-rays Are Used to Detect and Treat Cancer.E. Seeking New Sources of EnergyF. Nuclear Energy is Beginning to Compete with CoalParagraph 3 ______ 04-01
Whistles could also be used to communicate between adult dolphins and baby dolphins.A．RightB．WrongC．Not mentioned 04-01
People are confused in their attempts to control malaria in Europe in the early 1900s, because scientists ______.A．identified only one mosquito species instead of six speciesB．thought only three mosquito species transmitted diseaseC．thought there was only one mosquito speciesD．did not know what species was being studied 04-01