2017年9月1日四川成都gre作文机经.

　　考试时间：2010-9-1 13:00

　　考点地点：成都川大考点

　　ISSUE120：

　　So much is new and complex today that looking back for an understanding of the past provides little guidance for living in the present.

　　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.