Many Americans harbor a grossly distorted and exaggerated view of most of th

游客2025-04-19 29

问题 Many Americans harbor a grossly distorted and exaggerated view of most of the risks surrounding food. Fergus Clydesdale, head of the department of food science and nutrition at the University of Massachusetts-Amherst, says bluntly that if the dangers from bacterially contaminated chicken were as great as some people believe, "the secrets would be littered with people lying here and there:"
Though the pubic increasingly demands no-risk food, there is no such thing. Bruce Ames, chairman of the biochemistry department at the University of California, Berkeley, points out that up to 10% of a plant’s weight is made up of natural pesticide. Says he, "since plants do not have jaws or teeth to protect themselves, they employ chemical warfare." And many naturally produced chemicals, though occurring in tiny amounts, prove in laboratory tests to be strong carcinogens — a substance that can cause cancer. Mushrooms might be banned if they were judged by the same standards that apply to food additives. Declares Christina Stark, a nutritionist at Cornell University: "We’ve got far worse natural chemicals in the food supply than anything man-made."
Yet the issues are not that simple. While Americans have no reason to be terrified to sit down at the dinner table they have every reason to demand significant improvements in food and water safety. They unconsciously and unwillingly take in too much of too many dangerous chemicals. If food already contains natural carcinogens, it does not make much sense to add dozens of new man-made ones. Though most people will withstand the small amounts of contaminants generally found in food and water, at least a few individuals will probably get cancer one day because of what they eat and drink.
To make good food and water supplies even better, the Government needs to tighten its regulatory standards, stiffen its inspection program and strengthen its enforcement policies. The food industry should modify some long-accepted practices or turn to less hazardous alternatives. Perhaps most importantly, consumers will have to do a better job of learning how to select and cook food properly. The problems that need to be tackled exist all along the food-supply chain, from fields to processing plants to kitchens. [br] The author considers it impossible to obtain no-risk food because______.

选项 A、many vegetables contain deadly natural chemicals
B、almost all foods have additives
C、no food is free from pollution in the environment
D、Pesticides are widely used in agriculture

答案 A

解析本题为细节分析题。根据第二段第二句话“…points out that up to 10％ of a plant’s weight is made upof natural pesticide．”可知，作物10％的成分为天然的杀虫剂。通过下文可知，这种天然的化学药剂是强性致癌物质。A选项符合原文意思。B选项文中并未提及。文中说的是作物自身会产生天然的化学药剂，与环境或使用杀虫剂无关，因此，排除C和D选项。因此，A选项正确。

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