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GRE Argument 91题目：
The following appeared in an article in Supplements Today.
"Dieticians have long known that professional athletes who eat a lot of nuts have higher levels of endurance than those who do not(1). Researchers have recently discovered that the particular combination of vitamin N and fiber found in some nuts provides a boost(2) for those who participate in strenuous physical activities(3) daily. Both vitamin N and fiber supplements are easily synthesized and widely available. As a result, all(6) those who participate in athletic activities will be able to increase their endurance and win more games(7) by taking vitamin N along with a fiber supplement(4,5)."
提纲：
(1)The argument simply assumes that eating a lot of nuts is the reason for higher levels of endurance in athletes.
(2)The article fails to clearly describe what kind of boost the combination could provide.
(3)The effect of the combination on people who participate in strenuous physical activities may be different from what is needed for athletes.
(4)The article unfairly assumes that taking vitamin N and a fiber supplement separately could have the same effect on endurance as eating nuts.
(5)The article assumes without any guarantee that synthesized vitamin N and fiber supplements would have the same effect on athletes as those contained in natural foods.
(6)The article hastily assumes that the cases of professional athletes could also be applied to all people who participated in athletic activities.
(7)If people could win a game may be determined by many factors, thus taking the supplements alone does not necessarily ensure more victories.
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