中学科学双语选修教材 中学生活与科学 5 教师用书PDF电子书下载

A Healthy Body健康的体魄 1

12.1 How Do We Keep Our Bodies Healthy?如何保持身体健康？ 4

12.2 Food Substances食物成分 7

12.3 A Balanced Diet均衡饮食 17

12.4 Natural Food and Processed Food天然食品和加工食品 24

12.5 Digestion and Absorption ofFood食物的消化和吸收 31

12.6 The Fate ofthe Digested Food被消化食物的归宿 42

12.7 Our Circulatory System人体的循环系统 45

12.8 Fatty Foods in Our Diet and Their Effects on Our Health膳食中的高脂食物及其对健康的影响 54

12.9 Exercise and Health运动与健康 59

12.10 Need for Rest休息的必要性 69

Key to Test yourself单元测试答案 73