A、Diet. B、Weight control. C、Aerobic exercise. D、Eating habits and exercise. D主旨题。通常听力对话的主旨题在开头对话中能提供,但要注意对话中的转折连词。本对话中开头听到diet,但

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问题  
Diet, diet, diet! It gets to be a constant battle for many of us to stay fit and healthy. But diets don’t al ways allow us to learn new eating habits, improve our self-image, or make lifestyle changes. Developing good eating habits and proper exercise is a permanent issue. And it’s the main topic of this workshop.
    In order to keep a healthy diet and minimize the risk of disease, it’s essential to cat a diet that Consists of low-fat foods and to maximize energy with carbohydrates. Beef, nuts, oils, and most dairy products are rich in fat, so you should eat less of those; while pas try, rice, potatoes, and bread contain almost no fat and are a high energy source of complex carbohydrates. You know that many food manufactures. Use sugar to make low-fat or fat-free foods taste good, but don’t worry too much about that. You don’t necessarily "get fat" by eating sugar, since sugar is an indirect fat.
    When you exercise, carbohydrates are the first calories to burn, if you want to burn off fat, it’s good to do some sort of aerobic exercise such as biking, swimming, running, or fast walking. But you have to keep doing this exercise for at least twenty minutes because it takes about that long before we start to burn fat. And then the effect of burning fat decreases after forty-five minutes of exercise. So if you do some sort of aerobic exercise for three to four days a week for about thirty to forty minutes, you’ll have an affective schedule for reducing weight.

选项 A、Diet.
B、Weight control.
C、Aerobic exercise.
D、Eating habits and exercise.

答案D

解析 主旨题。通常听力对话的主旨题在开头对话中能提供,但要注意对话中的转折连词。本对话中开头听到diet,但是说话者用but转折连词将话题的重点转移,可见but后的内容是强调的重点。此外短文中提到Developing good eating habits and proper exercise is a permanent issue.And it’s the main topic of this workshop.可见eating habits和exercise是对话的main topic。
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