题目内容
听力原文：M: Hi, Rachel, I want to travel around Europe this summer. Would you like to be my partner？
W: Oh, travel around Europe？ That's crazy! Let me think about it.
What does Rachel think about the man？
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听力原文：M: Did you take these pictures？ They are very good.
W: Yes, I think they turned out very well too. I like to bring my camera with me wherever I go. That's way if I see something attractive I can take a picture of it.
M: Carrying a big camera around is too much trouble for me.
W: My camera is really small enough. Here let me show you.
M: That is a compact camera. But you must know a lot about photography to get such professional looking results.
W: Not necessarily. This camera is simple to work. It has an automatic focus. I don't even have to worry about focusing.
M: That's what I need. When I take pictures, they usually come out blurry because I don't adjust the lenses properly. And I hate photos that are out of focus. Is a camera like yours very expensive？
W: Less than you'd expect. Why don't you check the prices that Head Fields demonstrates？ This model was on sale there last week.
M: I think I will. It certainly won't hurt to take a look.
What are the speakers doing as the conversation begins？
听力原文：W: I heard you got a full mark in physics exams. Congratulations!
M: Thanks! I'm sure you also did a good job.
What's the probable relationship between the two speakers？
The purpose of writing this article is______.
Natural foods, for example, are vegetable, fruit and grain which have been grown in soil and are rich in organic matter. In simple terms, this means that the soil has been nourished by unused vegetable matter, which provides it with essential vitamins and minerals. This in itself is a natural process compared with the use of chemicals and fertilizers, the main purpose of which is to increase the amount— but not the quality—of foods grown in commercial fanning areas.
Natural foods also include animals which have been allowed to feed and move freely in healthy pastures. Compare this with what happens in the mass production of poultry: there are battery farm, for example, where thousands of chickens live crowded together in one building and are fed on food which is little better than rubbish. Chickens kept in this way are not only tasteless as food; they also produce eggs which lack important vitamins.
There are other aspects of healthy eating which are now receiving increasing attention from experts on diet. Take, for example, the question of sugar. This is actually a nonessential food ! Although a natural alternative, such as honey, can be used to sweeten food if it is necessary, we can in fact do without it. It is not that sugar is harmful in itself. But it does seem to be addictive: the quantity we use has grown steadily over the last two centuries and in Britain today each person consumes an average of 200 pounds a year! Yet all it does is to provide us with energy, in the form. of calories. There are no vitamins in it ,no minerals ,and no fibre.
It is significant that nowadays fibre is considered to be an important part of a healthy diet. In white bread, for example, the fibre has been removed. But it is present in unrefined flour and of course in vegetables. It is interesting to note that in countries where the national diet contains large quantities of unrefined flour and vegetables, certain diseases are comparatively rare. Hence the emphasis is placed on the eating of whole meal bread and more vegetables by modem experts in "healthy eating".
This passage is mainly concerned with______.
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