填空题 The individual's age, size, 1and environmental temper will influence the amount of
fluid one person needs each day.

  • 1、
【正确答案】 1、level of physical activity    
【答案解析】[解析] 本题答案来自于文章第16段第2句：“How much fluid each person needs depends on the individual's age，size，level of physical activity，and environmental temperature”。