第三部分 阅读理解(共20题,每小题2分,满分40分)

Recently, tests have proved that Beethoven died from lead poisoning. Bill Walsh directed the Beethoven Research Project. Mr. Walsh and his team examined pieces of bone belonging to Beethoven. They found a large amount of lead in the bone pieces. They said the lead levels were equal to those found in pieces of his hair in earlier studies of other scientists.

Genetic tests proved the bone pieces and his hair came from Beethoven. The research also examined bone fragments from someone else who lived during the same period. Both were from the top of the skull. The fragments from Beethoven had more lead than those from other person. Their study didn’t find measurable levels of cadmium(镉) or mercury(汞), which scientists used to consider were the causes of his health problems.

Beethoven was sick for much of his life. He experienced strong stomach pains, a sign of lead poisoning, and a change of personality when he was around 20. he also got angry easily, and suffered from depression and hearing loss. His health problems became worse as he grew older.

Walsh said the lead levels found in his skull suggested that the metal might have been present in his body for many years. He said although there had been recognized cases of deafness caused by lead poisoning, there was no strong evidence to suggest that lead poisoning was the cause of his deafness.

Beethoven visited many doctors to find a cure for his health problems, in a letter he wrote to a friend, he urged researchers to examine his body after he died so that other people would not have to suffer as he did.

61. If too much lead is in a person’s body, he will______.

   A. suffer hearing loss             B. get angry easily 

C. suffer serious stomach pains     D. lose most of his hair

62. From the passage we can learn that_______.

  A. this is the first research into the cause of Beethoven’s death

B. any amount of lead will do great harm to people’s health

C. more lead was found in Beethoven’s bones than in his hair

D. scientists used to think that his death was caused by other metals instead of lead

63. In which section of the newspaper might you read this report?

  A. Health.   B. Technology.   C. Entertainment.   D. Culture.

64. What is the best title of the passage?

   A. A surprising discovery about Beethoven   B. Beethoven died from lead poisoning

C. Lead--- a killer metal for human beings    D. New examination of Beethoven’ body  

Rising levels of carbon dioxide in the atmosphere are a major cause of climate change, and now a new study has confirmed that atmospheric CO2 is also affecting the ocean chemistry and potentially harming sea life.

Montana State University scientist Robert Dore has been researching the water in the Pacific Ocean for almost two decades.

"We've been going to the same spot in the Pacific Ocean, and we try and characterize long-term change in the open ocean environment. And one of the key things that we measure is CO2 levels. And we've been able to record this increasing quantity of atmospheric CO2 into the ocean."

Scientists expected that as atmospheric CO2 increased, more and more of the carbon dioxide would be absorbed into the ocean, affecting the chemical balance of the sea water, with a potentially harmful impact on shellfish and coral in particular.

"As carbon dioxide dissolves(溶解) in the water, or seawater in this case, it forms a weak acid, carbonic acid," Dore explains. "And therefore, as the concentration of CO2 in the atmosphere goes up and that exchanges with the surface seawater, it drives the pH down, and makes it more acidic."

The seawater Dore and his colleagues have analyzed confirms what the theory predicts.

The effect was particular striking at about 250 meters down, and again at 500 meters. Dore and his colleagues came up with two possible explanations. It could be that surface water picked up CO2 and then moved to those depths. Or there could be a biological explanation.

"It's important to realize that the oceans are really becoming acidic. And it can have negative impacts on a whole variety of sea life from fish to coral. It's potentially catastrophic."

53.What can be the best title of the passage?

         A.Sea Life Facing Danger    B.Scientist Researching Seawater

       C.Oceans Becoming More Acidic        D.Climate Change Affecting Seawater

54.Which of the following shows the process of the impact of atmospheric CO2 on sea life?

       a.Sea life is endangered.

       b.CO2 goes into the surface water.

       c.The ocean chemistry is affected.

       d.CO2decreases the PH and makes the seawater more acidic.

 0  23156  23164  23170  23174  23180  23182  23186  23192  23194  23200  23206  23210  23212  23216  23222  23224  23230  23234  23236  23240  23242  23246  23248  23250  23251  23252  23254  23255  23256  23258  23260  23264  23266  23270  23272  23276  23282  23284  23290  23294  23296  23300  23306  23312  23314  23320  23324  23326  23332  23336  23342  23350  151629 

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网