2011年卫生类职称英语考试模拟试题及答案5

o Kinlen, a cancer epidemiologist at Oxford University, who said that exposure to a common unidentified infection through population mixing resulted in the disease.
　　31 Who first hinted at the possible cause of childhood leukaemia by infection? ________
　　A Leo Kinlen.
　　B Richard Doll.
　　C Louise Parker.
　　D Heather Dickinson.
　　32 Which statement can be supported by Heather Dickinson and Louise Parker's new findings? ________
　　A Radiation has contributed to the disease.
　　B Putting a lot of people from rural area in a large towns increases the risk of childhood leukaemia.
　　C Population mixing is the most important reason for leukaemia cluster.
　　D Childhood leukaemia is caused by an unusual infection.
　　33 According to the passage, which of the following is true? ________
　　A Most people believe childhood leukaemia is due to environmental factors.
　　B Population mixing best explains the cause of childhood leukaemia.
　　C Radiation has nothing to do with childhood leukaemia.
　　D Children born in a large town are at higher risk of leukaemia.
　　34 Cancer Research Campaign is most possibly a ________.
　　A medical journal
　　B research institute
　　C private company
　　D governmental agency
　　35 This passage is mainly about ________.
　　A the cluster of leukaemia eases around the Sellafield nuclear reprocessing part
　　B the kind of infection that causes childhood leukaemia
　　C the causes of childhood leukaemia
　　D a new finding by British scientists
　第二篇 Mobile Phone and Diseases
　　A study by scientists in Finland has found that mobile phone radiation can cause changes in human cells that might affect the brain, the leader of the research team said.
　　But Darius Leszczynski, who headed the 2-year study and will present findings next week at a conference in Quebec(魁北克), said more research was needed to determine the serious-ness of the changes and their impact on the brain or the body.
　　The study at Finland's Radiation and Nuclear Safety Authority found that exposure to radiation from mobile phones can cause increased activity in hundreds of proteins in human cells grown in a laboratory, he said.
　　"We know that there is some biological response. We can detect it with our very sensitive approaches, but we do not know whether it can have any physiological effects on the human brain or human body," Leszczynski said.
　　Nonetheless the study, the initial findings of which were published last month in the scientific journal Differentiation, raises new questions about whether mobile phone radiation can weaken the brain's protective shield against harmful substances.
　　The study focused on changes in cells that line blood vessels and on whether such changes could weaken the functioning of the blood-brain barrier, which prevents potentially harmful substances from entering the brain from the bloodstream. Leszczynski said.
　　The study found that a protein called hsp27 linked to the functioning of the blood-brain barrier showed increased activity due to irradiation and pointed to a possibil