题目内容
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 ______.
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A．PERT diagramB．Network DiagramC．Petri NetD．Gantt chart
因特网中的协议应该满足规定的层次关系，以下选项中能正确表示协议层次和对应关系的是(67)。
M: Yes, we did, but we drove by it very fast. Let's walk around it today. I always prefer walking to driving.
Q: What can we learn from the conversation？
(15)
"When one of the doctors criticizes(批评) me, I get defensive. I feel like a child again, being scolded, and I want to explain that I' m not wrong. "says Viola, a nurse. This s a common reaction(反应) to criticism, but not a good one. There are better ways of dealing with criticism.
1. Try to be objective (客观) . When Sol was criticized by his new employer for not having made a sale, Sol' s reaction was to feel sorry for himself. "I had put everything I had into making that sale," Sol says, "and I felt that I had failed as a person. I had to earn through experience not to react like that to each failure. "
2. Take time to cool down. Rather than reacting immediately to criticism, take some time to think over what was said . Your first question should be whether the criticism is fair from the other person' s position. The problem may be a simple misunderstanding of what you did or your reasons for doing it.
3. Take positive(积极的) action. After you cool down, consider what you can do about the situation. The best answer may be "nothing". "I finally realized that my boss was having personal problems and taking them out on me because I was there," says Sheila. "His criticisms didn' t really have anything to do with my work, so nothing I said or did was going to change them. " In Sheila' s case, the best way to deal with it was to leave her job. However, that' s an extreme reaction. You may simply explain your opinion without expecting an in-depth discussion. You may even decide that the battle isn' t worth fighting this time. The key, in any case, is to have a reasonable plan.
When Sol was criticized by his employer, he______
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