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  3. The use of chemicals in almost all areas of life has become a commonplace phenomenon. There is growing evidence, however, that c

The use of chemicals in almost all areas of life has become a commonplace phenomenon. There is growing evidence, however, that c

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问题     The use of chemicals in almost all areas of life has become a commonplace phenomenon. There is growing evidence, however, that chemicals in the environment, including pesticides, may contribute to some illnesses. While studies are still being conducted, preliminary conclusions point to the verdict that such chemicals are indeed negatively impacting those humans to whom they are exposed.
    Children are especially vulnerable to toxic substances. Pound for pound, they eat, drink and breathe more than adults, all of which exposes them more heavily to those chemicals to which most individuals encounter on a daily basis. Furthermore, their bodies are still in developing stages, exacerbating the negative effects of those chemicals which negatively impact them.
    Of 50 types of pesticides commonly used in American schools, a study conducted by the National Coalition Against the Misuse of Pesticides found that many caused negative reactions in laboratory animals. Such negative effects included kidney and liver damage, cancer, and neurological and reproductive problems.
    These implications of these findings are far-reaching. Given the variety of harmful effects attributed to those pesticides tested, one must pause and consider whether it is wise to continue their use in the nation’s schools, where children will be constantly exposed to them. Activists have lobbied for the elimination of such use with a degree of success, and recent findings, if supported by further analysis and confirmation, may help further the cause. A long term solution or alternative, however, remains elusive.
    In the short run, however, there may be some measures that can be taken to mitigate the harmful effects of dangerous pesticides. The American Medical Association’s Council on Scientific Affairs concluded in a 1997 report that given the "particular uncertainty ... regarding the long-term health effects of low-dose pesticide exposures," it is "prudent" for adults and children to limit their exposure and to "consider the use of the least toxic chemical pesticides or non-chemical alternatives."
The citing of dangerous effects of pesticides on laboratory animals in paragraph 3 is used to suggest that______.
选项 A、scientists are also concerned with the effects of pesticides on animals
B、cancer is the worst effect of the pesticides
C、most or all of the dangerous effects of pesticides are now known
D、the chemicals may also cause these effects in humans
答案D
解析 属信息推断题。第三段说明很多杀虫剂会给动物带来诸多不良反应。第四段第一、二句说明这一研究的意义：这些研究结果具有深远的意义。考虑到形形色色的副作用，人们必然会思考这样一个问题：由于孩子们将与这些有害物质长时间地连续接触，那么在学校里继续使用这些杀虫剂是不是明智之举?由此可推知，选项D正确。其他选项在文中均无推理依据，故可排除。
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