[解析]
(1)细节理解题。根据第二段The scientists behind the research are now advising people to monitor their salt intake—and food companies to lower the salt content in their products.(这项研究背后的科学家现在建议人们监控盐的摄入量,并建议食品制造商降低产品中的含盐量。)可知食品工业降低了产品中的盐含量,以帮助降低人们的高血压。故选D。
(2)词义推测题。根据第三段Previously,experts believed that eating high amounts of fruit and vegetables might help offset the effects of high salt on blood pressure.However,while these foods do tend to lower blood pressure,the new research suggests they do not offset the adverse influence of high salt intake.(此前,专家认为食用大量水果和蔬菜可能有助于抵消高盐对血压的影响。虽然这些食物确实有助于降低血压,但新的研究表明,它们并不能抵消高盐摄入的不利影响。)可知adverse的意思是"有害的,不利的"。A.Adventurous.冒险的;B.Harmful.有害的,不利的;C.Brief.简短的;D.Average.平均的。故选B。
(3)细节理解题。根据第五段The recommended upper limit of adult salt intake in the UK is 6 g a day.The study found that the average salt intake across the study was 10.7 g a day.The average intake for the UK was 8.5 g,while the intake for the USA,China and Japan were 9.6 g ,13.4 g and 11.7 g respectively.(英国人的平均盐摄入量为8.5克,而美国人、中国人和日本人的平均盐摄入量分别为9.6克、13.4克和11.7克。中国人的平均盐摄入量最高。)可知中国平均盐摄入量最高。故选B。
(4)标题归纳题。根据第一段A healthy diet may not offset(抵消) the effects of a high salt intake on blood pressure,suggests a new study.(一项新的研究表明,健康的饮食可能无法抵消高盐摄入对血压的影响。)可知,健康的饮食可能无法抵消高盐摄入对血压的影响。后面几段围绕此话题展开。因此最佳标题是A.A healthy diet may not offset the effects of high salt intake(健康的饮食可能无法抵消高盐摄入的影响)。故选A。