单选题

Pesticides (杀虫剂)

Why do pesticides(杀虫剂)fit into the picture of environmental disease? We have seen that they now pollute soil, water and food, that they have the power to make our streams fishless and our gardens and woodlands silent and birdless. Man, however much he may like to pretend the contrary, is part of nature. Can he escape a pollution that is now so thoroughly distributed throughout our world?
We know that even single exposures(暴露)to these chemicals, if the amount is large enough, can cause extremely severe poisoning. But this is not the major problem. The sudden illness or death of farmers, farm workers and others exposed to sufficient quantities of pesticides are very sad and should not occur. For the population as a whole, we must be more concerned with the delayed effects of absorbing small amounts of the pesticides that invisibly pollute our world.
Responsible public health officials have pointed out that the biological effects of chemicals are cumulative(积累的) over long periods of time, and that the danger to the individual may depend on the sum of the exposures received throughout his lifetime. For these very reasons the danger is easily ignored. It is human nature to shake off(摆脱) what may seem to us a threat of future disaster. "Men are naturally most impressed by diseases which have obvious signs", says a wise physician, Dr. Rene Dubos, "yet some of their worst enemies slowly approach them unnoticed. /

单选题 Which of the following is closest in meaning to the sentence "Man is part of nature. " (Line 3～4, Par

【正确答案】

【答案解析】[解析] 本题考查考生对特定语言的理解能力。考的是找出与所给句子Man，however much he may like to pretend the contrary，is part of nature. 意思相近的句子。解题的关键是正确理解原文句子的意思。在这里，however相当于no matter how，引导条件状语从句，这句话的意思是：人类不论怎样假装，仍是大自然的一部分。选项A人对自然界中发生的事情漠不关心，选项C人可以避免环境污染的后果，和选项D人可以推卸他对环境的责任，都与原句相差甚远。只有选项B人类进行各种各样的活动，好像他们不属于自然似的，与之相接近。所以,正确答案是B。

单选题 What is the author's attitude towards the environmental effects of pesticides?

【正确答案】 D

【答案解析】[解析] 本题考查考生的综合判断能力。考的是作者对于杀虫剂对环境影响的态度。本文是一篇议论文，谈的是杀虫剂对环境的污染，以及对人体健康的威胁。文章第一段，作者谈到杀虫剂对环境污染严重。第二段指出，对全民来说，应该更加重视和关心不断被人体吸收的小剂量的慢性污染。第三段又强调了防止杀虫剂对人类的慢性污染是最重要的问题。由此可见，作者深切关注杀虫剂对环境的影响，而选项B漠不关心的，和选项C防御的，明显与原文不符，选项A悲观的，从文中看不出。所以，正确答案是D。

单选题 In the author's view, the sudden death caused by exposure to large amounts of pesticides______

A、 is not the worst of the negative consequences resulting from the use of pesticides
B、 now occurs most frequently among all accidental deaths
C、 has sharply increased so as to become the center of public attention
D、 is unavoidable because people can't do without pesticides in fanning

【正确答案】 A

【答案解析】[解析] 本题考查考生把握细节的能力。考的是依据作者观点，大量接触杀虫剂造成的突然死亡的原因。而第二段第一句话We know that even single exposures(暴露)to these chemicals，if the amount is large enough，can cause extremely severe poisoning. But this is not the major problem. 直接提供了答案。所以，正确答案是A。

单选题 People tend to ignore the delayed effects of exposure to chemicals because

【正确答案】 C

【答案解析】[解析] 本题考查考生把握细节的能力。考的是人们容易忽视化学药品慢性影响的原因。答案的线索在文章第三段一句话：Responsible public health officials have pointed out that the biological effects of chemicals are cumulative(积累的)over long periods of time，and that the danger to the individual may depend on the sum of the exposures received throughout his life-time．所以，正确答案是C。

单选题 It can be concluded from Dr Dubos' remarks that______.

【正确答案】 D

【答案解析】[解析] 本题考查考生的逻辑分析能力。考的是从瑞尼·杜博博士的话中可以推出的结论。瑞尼·杜博博士说，“人们对那些有明显症状的疾病印象最深，然而有些最可怕的敌人却在不知不觉中慢慢地来到了身边。”由此可见，杀虫剂等化学药品的剧毒作用是长期积累的结果，正因为如此，人们往往忽视它的慢性影响。所以，正确答案是D。