What is the passage mainly about? When two heavy people get married, chances of their children getting fat increase, because ob

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问题 What is the passage mainly about?
When two heavy people get married, chances of their children getting fat increase, because obesity is ______ .

选项

答案partly genetic

解析 根据题干的信息when two heavy people get married对应第七个小标题,再根据空格前的信息because obesity is准确定位至文章最后一句:obesity is partly genetic,因此填入空格的内容应该为partly genetic。
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