The accepted______ of adepuate diet have been challenged by new discoveries in nutrition.

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问题 The accepted______ of adepuate diet have been challenged by new discoveries in nutrition.

选项 A、formations
B、components
C、standards
D、ingredients

答案C

解析 standards意为"标准"；formations意为"构成物，排列"；components意为"成分，零件"；ingredients意为"成分，因素"。

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GCT工程硕士（英语）

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