<dfn id="w48us"></dfn><ul id="w48us"></ul>
  • <ul id="w48us"></ul>
  • <del id="w48us"></del>
    <ul id="w48us"></ul>
  • 職稱英語綜合類概括大意模擬訓練題

    時間:2020-11-10 15:53:15 職稱英語 我要投稿

    2017年職稱英語綜合類概括大意模擬訓練題

      Geology and Health

    2017年職稱英語綜合類概括大意模擬訓練題

      The importance of particular metals in the human diet has been realized within the past few decades, and the idea that geology might be related to health has been recognized for a number of elements such as iodine, zinc and selenium. For example, soils with low iodine contents produce crops, and animals deficient in iodine. A lack of iodine in the human diet leads to some serious diseases.

      The ultimate source of metals within the human body is rocks, which weather into soil, gaining or losing some of their chemical constituents. The crops we eat selectively remove from the soil the elements that they require for growth. The water we drink contains trace elements leached from rock and soil. Thus the geology and geochemistry of the environments have effects on the chemistry and health of plants, animals and people.

      So far there is no data to suggest that people living on metal-rich soils experience a potential health hazard. The levels of metals within naturally contaminated soils are generally not high enough to cause serious health problems. Living on metal-rich soils does not represent a health risk unless large quantities of soil are digested or metal-rich dust is inhaled. However, small children are particularly exposed to metal-rich topsoil in playgrounds and gardens. They are also the most likely ones to eat potentially dangerous metal-rich soil.

      Heavy metals are persistent; they do not break down to other chemicals in the environment. Industrially polluted sites usually undergo intensive clean-up and rehabilitation because heavy metals are a health concern once they enter the food chain. Some trace metals are alleged to cause cancer and are also known to cause poisoning.

      In contrast, naturally contaminated soils have not been subject to risk assessment studies and rehabilitation measures, despite the fact that they frequently possess metal concentrations well above those of such polluted by humans and above environmental quality criteria.

      There is a vital need to understand the potential risks and long-term health effects of living on naturally contaminated soils. Future environmental investigations of naturally polluted soils should concentrate on the potential pathways of metals into the food chain and human body. Geologists should be part of such studies as they can provide the essential background information on rock and soil chemistry as well as the chemical forms of heavy metal pollution.

      A. No evidence to indicate bad effects of naturally contaminated soil

      B. Potential hazards of human contaminated soils

      C. Research on channels of heavy metals getting into human food chain

      D. Geology and health problems

      E. Rocks-the ultimate source of soil pollution

      F. Long- term helth effects on children

      1. Paragraph 1

      2. Paragraph 3

      3. Paragraph 4

      4. Paragraph 6

      A. industrially polluted soils

      B. rock and soil chemistry

      C. naturally polluted soils

      D. the pathways of metals into the food chain

      E. the element of iodine

      F. the persistence of heavy metals

      5. Some serious diseases is connected with deficiency of ……

      6. It is extremely necessary to study the long-term effects caused by living on ……

      7. Geologists are indispensable in the research project on geology and health due to their knowledge on……

      8. Industrially contaminated sites usually require a thorough clean-up due to ……

      Key: DABCECBF

    【2017年職稱英語綜合類概括大意模擬訓練題】相關文章:

    職稱英語考試《綜合類》概括大意檢測題10-12

    2016年職稱英語A級概括大意題答案「綜合類」11-04

    關于職稱英語的概括大意題10-20

    2017年職稱英語考試綜合類A概括大意訓練題09-16

    職稱英語綜合類概括大意練習題10-12

    2017年職稱英語考試綜合類C概括大意訓練題09-18

    2017年職稱英語考試綜合類B概括大意訓練題09-17

    職稱英語綜合類C概括大意模擬題11-12

    2017職稱英語考試概括大意題高分技巧08-17

    主站蜘蛛池模板: 国产精品一区在线播放| 日产国产精品亚洲系列| 国产午夜福利精品久久| 国产午夜精品免费一区二区三区| 免费精品精品国产欧美在线欧美高清免费一级在线| 国产亚洲精品观看91在线| 亚洲国产成人一区二区精品区| 久久99精品久久久久久秒播| 99久久精品无码一区二区毛片| 欧美精品一区二区精品久久| 国产精品欧美一区二区三区不卡| 久久精品中文无码资源站| 午夜三级国产精品理论三级| 国产精品va久久久久久久| 久久96国产精品久久久| 91视频精品全国免费观看| 精品国产AV一区二区三区| 九九精品99久久久香蕉| 亚洲国产第一站精品蜜芽| 亚洲精品无码mv在线观看网站| 亚洲精品高清一二区久久| 日韩福利视频精品专区| 久久久不卡国产精品一区二区| 国产精品自在在线午夜福利| 91精品在线国产| 国产精品成| 国产亚洲精品国看不卡| 国产成人精品一区在线| 国产高清在线精品一区二区| 亚洲精品欧美综合在线| 国产高清在线精品一区小说 | 99久久综合国产精品二区| 久久国产精品99久久久久久老狼| 精品精品国产自在久久高清| 国产精品免费网站| 四虎精品影院永久在线播放| 四虎国产精品永久地址51| 9re热国产这里只有精品| 九色精品视频在线观看| 亚洲国产精品日韩| 日韩精品无码一区二区中文字幕|