首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
考研
Many Americans harbor a grossly distorted and exaggerated view of most of the risks surrounding food. Fergus Clydesdale, head of
Many Americans harbor a grossly distorted and exaggerated view of most of the risks surrounding food. Fergus Clydesdale, head of
admin
2010-01-13
74
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 streets would be littered with people lying here and there."
Though the public 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 (杀虫剂). 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 (蘑菇) might be banned if they were judged by the same standards that apply to food additives (添加剂). 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 important, 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.
By saying "they employ chemical warfare" (Para. 2), Bruce Ames means ______
选项
A、plants absorb useful chemicals to promote their growth
B、plants produce certain chemicals to combat pests and diseases
C、farmers use chemicals to protect plants against pests and diseases
D、farmers use man-made chemicals to dissolve the natural chemicals in plants
答案
B
解析
原文的句意是“因为植物没有坚硬的利齿来保护自己,所以它们只能使用化学(武器)来战斗”,也就是“这些植物会生成某种化学物来抗病抗虫”。
转载请注明原文地址:https://kaotiyun.com/show/atmi777K
0
在职申硕(同等学力)英语
相关试题推荐
Theworldisfullofnewhorrorsandthere’snoplacetohide.Whosaysso?Disasterpsychologists,forastart.Theyarethepe
Theworldisfullofnewhorrorsandthere’snoplacetohide.Whosaysso?Disasterpsychologists,forastart.Theyarethepe
Wearepreparedtooverlooktheerroronthisoccasion______yourpreviousgoodwork.
Mostpeoplewouldagreethat,althoughourageexceedsallpreviousagesinknowledge,therehasbeennocorrespondingincrease
Theworldisfullofnewhorrorsandthere’snoplacetohide.Whosaysso?Disasterpsychologists,forastart.Theyarethepe
Theworldisfullofnewhorrorsandthere’snoplacetohide.Whosaysso?Disasterpsychologists,forastart.Theyarethepe
Theworldisfullofnewhorrorsandthere’snoplacetohide.Whosaysso?Disasterpsychologists,forastart.Theyarethepe
Wenolongerkeepuptheclosefriendshipoffewyearsago,thoughwestillvisiteachotheronoccasion.
随机试题
软下疳临床表现错误的是
患者,女,50岁,患类风湿性关节炎多年。近日受凉后,自觉关节肿胀、疼痛有所加重,晨起双手指关节黏着感明显,需等待40分钟以上方可缓解,查体双手指间关节呈梭形肿胀,并轻度向尺侧偏斜,有压痛。提示患者病情活动度的一项表现是
涂料就其组成而言,大体上可分为()。
AIS实质是将会计数据转化为()的系统。
按照《会计从业资格管理办法》的规定,下列说法错误的有()。
在寿险经营中对于再保险手段的运用是()
篮球比赛中,下列哪一种情况裁判员不应判球出界违例?()
简述幼儿思维方式发展变化的趋势。
公安赔偿中的损害是客观上已经发生的对人身权、财产权的损害,还包括可能造成的损害。
Pollutionhasbecomeaseriousprobleminalmostallthebigcitiesoftheworld.Citypeoplearebecomingmoreandmoreworried
最新回复
(
0
)