2017年4月2日西安gre作文机经.

　　考试时间：2011.04.02 08:30

　　考试地点：西安外国语学院

　　Issue147 ."Tradition and modernization are incompatible. One must choose between them."

　　Argument34.Milk and dairy products are rich in vitamin D and calcium, substances essential for building and maintaining bones. Many people therore believe that a diet rich in dairy products can help prevent osteoporosis, a disease in which the bones weaken significantly with age and that is linked to both environmental and genetic factors. But a long-term study of a large number of people has found that those who have consistently consumed dairy products throughout the years of the study have a higher rate of bone fractures than any other participants in the study. Since bone fractures are a symptom of osteoporosis, this study result shows that a diet rich in dairy products may actually increase, rather than decrease, the risk of osteoporosis.