参考答案：错

解析：[听力原文]Avoid artificial sweeteners and synthetic fat substitutes and the foods made with them. They are unhealthy and not conducive to the development of the kind of good eating habits you need to slim down and stay that way.

[分析]： 特定信息的找寻和判断。 关于artificial sweeteners“人造甜味素”和synthetic fat substitutes“人造脂肪”，文中认为这些东西应既不健康又不利于保持轻盈体态。由此可见，题干的说法与原文不符，因此是不正确的。[解题关键] 掌握指示代词的指代关系。如本题原文中they即指artificial sweeteners and synthetic fat substitutes。