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  3. According to the text which THREE of the following conditions have been scientif

According to the text which THREE of the following conditions have been scientif

游客2025-02-17  50
问题 According to the text which THREE of the following conditions have been scientifically proved to have a psychological effect on humans?
Choose THREE letters A-G and write them in boxes 35-37 on your answer sheet.
A lack of negative ions
B rainy weather
C food consumption
D high serotonin levels
E sunny weather
F freedom from worry
G lack of counselling facilities [br]
选项
答案 D // high serotonin levels
解析
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