Increasingly, over the past ten years, people—especially young people—have become aware of the need to change their eating habit, because much of the food they eat, particularly processed foods, is not good for the health. Consequently, there has been a growing interest in natural foods: foods which do not contain chemical additives and which have not been affected by chemical fertilizers, widely used in farming today. 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 a-mount—but not the quality--of foods grown in commercial farming 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 wholemeal bread and more vegetables by modem experts in "healthy eating". This passage is mainly concerned with ______.
A. people’s growing interest in natural foods
B. natural food and healthy diet
C. the importance of fibre in foods
D. harmful effects of sugar
Many critics worry about violence on television, most out of fear that it stimulates viewers to violent or aggressive acts. Our research, however, indicates that the consequences of experiencing TV’s symbolic world of violence may be much more far-reaching.we feel that television dramatically demonstrates the power of authority in our society, and the risks involved in breaking society’s rules. Violence-filled programs show who gets away with what, and against whom. It teaches the role of victim, and the acceptance of violence as a social reality we must learn to live with or flee from.We have found that people who watch a lot of TV see the real world as more dangerous and frightening than those who watch very little. Heavy viewers are less trustful of their fellow citizens, and more fearful of the real world.Since most TV "action-adventure" dramas occur in urban settings, the fear they inspire may contribute to the current flight of the middle class from our cities. The fear may also bring in creasing demands for police protection, and election of law-and-order politicians.Those who doubt TV’s influence might consider the impact of the automobile on American society. When the automobile burst upon the dusty highways about the turn of the century, most Americans saw it as a horseless carriage, not as a prime mover of a new way of life. Similarly, those of us who grew up before television tend to think of it as just another medium in a series of 20th-century mass-communications systems, such as movies and radios. But it is not just another medium. What’s the difference between heavy TV viewers and less heavy ones()
山茶花又开了,那样洁白而又美丽的花朵,开了满树。 每次,我都不能无视地走过一棵开花的树。那样洁白温润的花朵,从青绿的小芽儿开始,到越来越饱满,到慢慢地绽放;从半圆,到将圆,到满圆。花开的时候,你如果肯仔细地去端详,你就能明白它所说的每一句话。就因为每一朵花只能开一次,所以,它就极为小心地绝不错一步,满树的花,就没有一朵开错了的。它们是那样慎重和认真地迎接着唯一的一次春天。 所以,我每次走过一棵开花的树,都不得不惊讶与屏息于生命的美丽。 从文体特点来说,这是一篇:
A. 记叙文
B. 说明文
C. 诗歌
D. 散文