57. Richard Axel believed that he had won Nobel Prize only after ____.

A.　　 he checked with the Noble Committee Website

B.　　　 Swedish public radio called him the early morning

C.　　　 he remained awake after a cup of coffee

D. his co-worker Linda Buck called him

56. The discovery of the basic biology of the sense of smell can be applied EXCEPT

A. to make medicine taste better　　　　 　　　　　　 B. to prevent mosquito's attacks

C. to check how some diseases spread　　 　　　　　　 D. to enrich people's life

75．What does Professor Mark Holzapple think of the development of ethanol fuel in industrial countries?

　　　 A．It needs the cooperation of many chemists.

　　　 B．It is connected with the use of advanced equipment.

　　　 C．It will improve the use of heat from waste gases.

　　　 D．It requires the support of the government.

　　　 56-60CDAAB　　 61-65CBDAD　　 66-70BBBAD　　　 71-75DBABD

A

A pair of American scientists who worked out the basic biology of the sense of smell yesterday won the Nobel Prize in Physiology or Medicine.

Richard Axel of Columbia University and Linda Buck of the Fred Hutchinson Cancer Research Center shared the $ 1. 36 million prize for discovering the secret structure by which animals differentiate among the world's countless smells, which add so much to life's richness while providing possible life-saving information about what's going on outside the body. The work has practical applications, from the development of better tasting medicines to finding ways to block mosquitoes' ability to smell humans, checking their ability to spread malaria and other diseases. Before Axel and Buck ' s work, scientists had no idea how many genes might be related in smell and how those genes behaved inside cells.

Axel, who was in California yesterday, said he learned of the award about 3:15 a. m. when he was awakened by a call from Swedish public radio. But he did not comment until checking the evidence that he had won , by logging on to the Nobel Committee Website. After that, he said, he made himself a cup of coffee, deciding to remain awake "to appreciate the moment.

In a telephone news conference from Seattle, Buck, 57, said the unusual experiments, which took about three years, "didn't really have to work. There was a bit of luck. " Asked to describe the upbringing that helped her to become the llth woman to win a Nobel Prize in science, she said her father, an electronics engineer, "did a lot of experiments" and encouraged his three daughters to do the same. Her mother, a homemaker, was "interested in puzzles"---another factor. Buck said, that may have inspired her.

74．The author mentions all of the following resources for making ethanol except.

　　　 A．corn starch　　　　　　　　　　 B．natural gas　　　　　　　　　　 C．waste paper　　　　　　　　　　 D．solid waste

73．In this passage, what is the significance of the Clean Air Act passed by American Congress in 1990?

　　　 A．It will increase the consumers’ (消费者)demand for ethanol as a fuel.

　　　 B．It may increase the cost of producing gas.

　　　 C．It shows the view of the government on automobile production.

　　　 D．It limits the ethanol production of one company in the American Midwest.

72．Why does the interest in ethanol fuel increase in the United States according to the passage?

　　　 A．Ethanol products are known to cause cancer.

　　　 B．Ethanol can remove some harmful pollutants from gas.

　　　 C．The production of ethanol is protected by law.

　　　 D．Ethanol-fueled automobiles are cheaper than gas-fueled ones.

71．It can be inferred that, if the creatures from Mars came to Earth,　　　　 .

　　　 A．they would be kind to humans

　　　 B．they would be cruel to humans

　　　 C．they would be a great danger to Earth

　　　 D．it would be hard to say whether it would be good news or bad news

E

Ethanol : Clean and Cheap Fuel

　　　 Many Americans concerned about air pollution are demanding cleaner supplies of energy. The demand has resulted in increased research about ethanol fuel. Ethanol is an alcohol that can be mixed with gas. It burns up most of the pollutants in gas. It replaces some of the chemicals that are known to cause cancer, and it can be produced in the United States.

　　　 Some experts say that in the future ethanol will replace some of the oil imported into America. Today ethanol is less than one percent of total American fuel supply .The head of the National Corn Growers Association, Kieve Hars, says ethanol will provide twenty-five percent of the fuel supply by 2010. The organization is involved in the production of ethanol because it an be made from corn.

　　　 One company in American Midwest says it is starting to produce ethanol because of demands from people and from the government. The Congress approved　 the Clean Air Act in 1990.The company says this means the market for ethanol will expand (become larger).The company is a major producer of corn starch(淀粉)that can be used to made ethanol.

At Texas University Professor Mark Holzapple produces ethanol from materials found in solid waste. He has developed a way to turn materials like paper into simple sugar. He then uses yeast(酵母)to turn the sugar into ethanol. Professor Holzapple says two hundred liters of ethanol fuel can be produced from one ton of solid waste.

　　　 A professor at the University of Arkansas, John Geddie, is exploring another way to make ethanol .He is using acids(酸) on paper material .He says a large factory could produce ethanol from waste paper at a cost about the same as the cost of producing gasoline.

　　　 Environmentalists support the use of ethanol because it turns solid waste into a useful product. Professor Holzapple says law makers in industrial nations need to support the development of this clean ,less expensive fuel of the future.

70．How did scientists draw the conclusion that there was water on Mars?

　　　 A．The world’s leading magazine has announced the fact.

　　　 B．Scientists have taken many pictures and chemical readings on the mars.

　　　 C．Astronauts have got some rocks from Mars.

　　　 D．Scientists have made a study of the pictures and readings sent back by Mars detector.

69．Which of the following is true according to the text?

　　　 A．It is now certain that there was water on Mars.

　　　 B．The water on Mars was like an ocean.

　　　 C．Evidence of life on Mars has been found.

　　　 D．Search for life on Mars is a great risk to humans.

68．What proved that water existed on Mars?

　　　 A．The physical samples with salty chemicals.　　 B．The marks on rocks and salty chemicals.

　　　 C．Scientific achievements of 2004.　　　　　　　　　　　　 D．Creatures from Mars.