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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 main point of this text is that______.
选项 A、pesticides are dangerous and their uses need to be reevaluated
B、children suffer most from the effects of pesticides
C、schools are most responsible for pesticide-related illnesses
D、pesticides should be eliminated everywhere
答案A
解析 属主旨思想题。文章第一段第二句以however引出真正的主题：然而，愈来愈多的证据表明包括杀虫剂在内的暴露在环境中的化学品会导致一些疾病的发生。接下来的几段介绍了其具体的负面影响、有关研究结果及解决办法等，最后一段总结上文，强调指出：鉴于接触低剂量杀虫剂会给长期健康带来副作用……，无论成人还是小孩都需行为谨慎，尽量减少与有害化学制品的接触，并且考虑使用含有尽可能少的有害物质的化学杀虫剂，或者使用不含化学成分的其他杀虫剂代用品。由此可见，选项A正确。选项B、C、D中都使用了语气绝对的词(most，most，everywhere)，与原文意思不符。
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