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  3. PASSAGE THREE What does the word "non-demented" in Paragraph 2 probably mean?

PASSAGE THREE What does the word "non-demented" in Paragraph 2 probably mean?

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问题 PASSAGE THREE
What does the word "non-demented" in Paragraph 2 probably mean?
选项
答案Mentally clear.
解析 根据第二段第二句…with 1，077 non-demented and otherwise healthy people aged between 60 and 90可知，调查研究的对象是1077名60岁到90岁之间的non-demented和healthy的人，其中的and otherwise表明这两个词在意思上是并列、递进的关系；再根据第三段前两句可知，在研究的前十年里，志愿者中有43人患上了阿尔茨海默病，后面又将这些患阿尔茨海默病的病人与未患病者进行比较。综上所述，可以推出Mentally clear为正确答案。
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