题目内容：

英语语法的3个问题 大师专家帮忙看下
1.The history of clinical nutrition or the study of the relationship between health and how the body takes in and utilizes food substances,can be divided into four distinct eras how引导的是什么从句?

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The history of clinical nutrition or the study of the relationship between health and how the body takes in and utilizes food substances,can be divided into four distinct eras: the first began in the ...