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　　今天的句子：

　　In a field where scientists have spent decades focused on genetics and the buildup of damaged protein fragments called beta-amyloid as causes of the disease, now many experts agree that air pollution plays a major role. For the most common form of Alzheimer’s, known as late-onset disease, researchers now estimate that at least 40 and as much as 65 percent of the risk involves nongenetic influences such as lifestyle and harmful environmental exposure.

　　思考题：

　　Traditional views on Alzheimer’s agreed that___.

　　A.it could be mainly attributed to genetics

　　B.it had a close relation to lifestyle choices

　　C.it was triggered by nongenetic factors

　　D.it was related to the harmful air pollution

　　词汇突破：

　　buildup沉积

　　protein fragments蛋白质片段

　　beta-amyloid β-淀粉样蛋白

　　Alzheimer’s 阿尔茨海默氏症

　　late-onset disease 晚发性亚型

　　亚型=类型=form

　　nongenetic 非基因的

　　involve 涉及到

　　句子解析：

　　第一句：

　　In a field where scientists have spent decades focused on genetics and the buildup of damaged protein fragments called beta-amyloid as causes of the disease(传统的观点), now many experts agree that air pollution plays a major role.

　　参考译文：在这一领域，科学家数十年来一直专注于遗传学，并将被称为β-淀粉样蛋白的受损蛋白质片段的沉积视作疾病成因，现在许多专家都同意空气污染起着重要作用。

　　注意：这里的疾病disease就包括后文的Alzheimer’s这就是阅读的相关性原则。

　　第二句：

　　For the most common form of Alzheimer’s, known as late-onset disease,researchers now(现在的观点) estimate that at least 40 and as much as 65 percent of the risk involves nongenetic influences such as lifestyle and harmful environmental exposure.

　　参考译文：研究人员现在估计，对于最常见的阿尔茨海默氏症亚型，即晚发性亚型，风险因素中至少40%到65%涉及非遗传影响，如生活方式和有害的环境暴露。

　　思考题解析：

　　Traditional views on Alzheimer’s agreed that___.

　　题干暗藏杀机!

　　问的是传统观点!

　　不是问现在的观点!

　　所以BCD都属于定位错误!

　　A正确!一剑封喉!你就说服不服吧!

　　A. it could be mainly attributed to genetics

　　(它可能主要归因于基因)

　　A选项正确。

　　B. it had a close relation to lifestyle choices

　　(它与生活方式的选择密切相关)

　　B选项错误。

　　C. it was triggered by nongenetic factors

　　它是由非基因因素引起的。

　　D. it was proven to be related to pollution

　　(它被证明与污染有关)

　　D选项错误。

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