62、根据以下资料，回答62-71题：
Drink from plastic bottles can raise the body's levels of a controversial "gender-bending" chemical by more than two thirds, according to tests.
Experts have been concerned about the possible health effects of bisphenolA (BPA.--an everyday chemical used in many plastic food and drink containers and tins as well as clear baby bottles--which is officially classified as toxic in some countries.A study found that participants who drank for a week from polycarbonate (聚碳酸酯) bottles showed a 69 percent increase in their urine (尿液) of BPA.
Researchers did not say how much liquid was drunk per day.Researchers from Harvard School ofPublic Health studied 77 students, who had first undergone a seven-day "washout" phase in which theydrank all cold beverages (饮料) from stainless steel bottles in order to minimise BPA exposure.
They were then given two polycarbonate bottles and asked to drink all cold beverages from themduring the next week.Previous studies have suggested that high levels of BPA consumption are linked tobirth defects, growth problems and an increased risk of heart disease.In particular there are fears thatheating the bottles, as parents would do when warming their baby's milk, causes the chemical to leak inpotentially dangerous quantities into the liquid contained within.
"If you heat those bottles, as is the case with baby bottles, we would expect the levels to beconsiderably higher.This would be of concern since infants may be particularly susceptible to BPA'shormone gland-disrupting (扰乱腺体极速分泌) potential." said the senior author of the latest study, Karin B.Michels.
Most adults carry BPA in their bodies but expert opinion on the risks is divided.The European Food Safety Authority believes that people naturally convert the chemical into less harmful substances in the body.
Previous studies had found that BPA could leach (渗出 ) from polycarbonate bottles into theircontents, but this study is the first to show the size of the corresponding increase in urinary BPAconcentrations in humans.
Harvard researcher Jenny Carwile said, "While previous studies have demonstrated that BPA is linkedto adverse health effects, this study fills in a missing piece of the puzzle--whether or not polycarbonateplastic bottles are an important contributor to the amount of BPA in the body."
What do we know about bisphenol A (BPA.from the beginning of the passage?
A.It is certain substance taken in by human beings every day.
B.It is a component contained in a number of plastic products.
C.It is an element that plays a decisive role in people's gender.
D.It is a kind of chemical that is universally regarded poisonous.
63、 According to Paragraph 4, the "washout" phase was designed to______.
A.make the research be accomplished with a result as satisfactory as possible
B.obtain references for the possible health effects of stainless steel bottles
C.eliminate substances in bodies that may affect the result of the research
D.limit the sort of beverages taken in by participants to the minimum level
64、 What result can be expected if baby bottles containing polycarbonate are heated?
A.The liquid in the bottles would absorb limited amount of converted BPA.
B.The infants should be seriously bothered by such disease as heart attack.
C.Babies would consume more BPA if they drink the liquid in the bottles.
D.The infants would undoubtedly refuse to drink the liquid in the bottles.
65、 How do experts evaluate the hazard that can be caused by BPA?
A.They think it is so common in bodies that it isn't hazardous material.
B.Different groups hold different viewpoints on this issue.
C.They believe it will be transformed into other safe materials.
D.They consider the amount of BPA in bodies decides its harmfulness.
66、 What is the significance of the study talked about in this passage?
A.It proved the assumption on BPA that studies previously.
B.It clarified the high risks that BPA may pose to people's health.
C.It confirmed the principal source of the substance BPA.
D.It showed what's responsible for the rising level of BPA in humans.
Part IV Translation.(30minutes)
Directions: For this part, you are allowed 30 minutes to translate a passage from Chinese into English. You should write your answer on Answer Sheet 2.
67、中国致力于建设国家创新体系，通过营造良好的环境，推进知识创新、技术创新和体制创新。中国政府支持科学家为了国家需求和科学发展开展基础研究，鼓励他们进行“好奇心驱动的研究”。在未来50年甚至更长的时期里，中国的发展将在很大程度上依赖于今天基础研究和高技术研究的创新成就，依赖于这些研究中所必然孕育的优秀人才。
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