单项选择题

From Dr Rattan's point of view, the results of calorie restriction in the CALERIE study ______.

A．were doubtable whether they were valid or not
B．did not show the effect in preventing age-related diseases
C．failed to prove the effect in increasing average lifespan
D．could not testify the effect in changing maximum lifespan

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热门试题

单项选择题

The CALERIE study is a turning point in the research field in ______.

A．studying the effect of calorie restriction on human beings instead of animals
B．having subjects with a wide range of age and weight
C．proving the positive effect of calorie restriction on prolonging people's life
D．excluding the positive effect of obesity reduction on keeping health

单项选择题

What can we learn about the subjects in the CALERIE study

A．They were selected by the National Institutes of Health.
B．They were divided into two groups according to their sex and age.
C．Half of them became thinner after the study.
D．They received periodical medical checks during the 6 months.