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The Reading Passage has four sections A-D. Choose the most suitable heading for each section from the list of headings below. Write the appropriate numbers i-viii in boxes 28-31 on your answer sheet. List of Headings i Global warming ii The dangers of the coal industry iii Superclean coal iv Environment protection measures v Coal as an energy source vi Coal and the enhanced greenhouse effect vii Research and development viii Mining site drainage A Coal is expected to continue to account for almost 27 per cent of the worlds energy needs. However, with growing international awareness of pressures on the environment and the need to achieve sustainable development of energy resources, the way in which the resource is extracted, transported and used is critical. A wide range of pollution control devices and practices is in place at most modern mines and significant resources are spent on rehabilitating mined land. In addition, major research and development programmes are being devoted to lifting efficiencies and reducing emissions of greenhouse gases during coal consumption. Such measures are helping coal to maintain its status as a major supplier of the worlds energy needs. B The coal industry has been targeted by its critics as a significant contributor to the greenhouse effect. However, the greenhouse effect is a natural phenomenon involving the increase in global surface temperature due to the presence of greenhouse gases - water vapour, carbon dioxide, tropospheric ozone, methane and nitrous oxide - in the atmosphere. Without the greenhouse effect, the earths average surface temperature would be 33-35 degrees C lower, or -15 degrees C. Life on earth, as we know it today, would not be possible. There is concern that this natural phenomenon is being altered by a greater build-up of gases from human activity, perhaps giving rise to additional warming and changes in the earths climate. This additional build-up and its forecast outcome has been called the enhanced greenhouse effect. Considerable uncertainty exists, however, about the enhanced greenhouse effect, particularly in relation to the extent and timing of any future increases in global temperature. Greenhouse gases arise from a wide range of sources and their increasing concentration is largely related to the compound effects of increased population, improved living standards and changes in lifestyle. From a current base of 5 billion, the United Nations predicts that the global population may stabilise in the twenty-first century between 8 and 14 billion, with more than 90 per cent of the projected increase taking place in the worlds developing nations. The associated activities to support that growth, particularly to produce the required energy and food, will cause further increases in greenhouse gas emissions. The challenge, therefore, is to attain a sustainable balance between population, economic growth and the environment. The major greenhouse gas emissions from human activities are carbon dioxide(C02), methane and nitrous oxide. Chlorofluorocarbons(CFCs)are the only major contributor to the greenhouse effect that does not occur naturally, coming from such sources as refrigeration, plastics and manufacture. Coals total contribution to greenhouse gas emissions is thought to be about 18 per cent, with about half of this coming from electricity generation. C The world-wide coal industry allocates extensive resources to researching and developing new technologies and ways of capturing greenhouse gases. Efficiencies are likely to be improved dramatically, and hence CO2 emissions reduced, through combustion and gasification techniques which are now at pilot and demonstration stages. Clean coal is another avenue for improving fuel conversion efficiency. Investigations are under way into superclean coal(3-5 per cent ash)and ultraclean coal(less than 1 per cent ash). Superclean coal has the potential to enhance the combustion efficiency of conventional pulverised fuel power plants. Ultraclean coal will enable coal to be used in advanced power systems such as coal-fired gas turbines which, when operated in combined cycle, have the potential to achieve much greater efficiencies. D Defendants of mining point out that, environmentally, coal mining has two important factors in its favour. It makes only temporary use of the land and produces no toxic chemical wastes. By carefully pre-planning projects, implementing pollution control measures, monitoring the effects of mining and rehabilitating mined areas, the coal industry minimises the impact on the neighbouring community, the immediate environment and long-term land capability. Dust levels are controlled by spraying roads and stockpiles, and water pollution is controlled by carefully separating clean water runoff from runoff which contains sediments or salt from mine workings. The latter is treated and re-used for dust suppression. Noise is controlled by modifying equipment and by using insulation and sound enclosures around machinery. Since mining activities represent only a temporary use of the land, extensive rehabilitation measures are adopted to ensure that land capability after mining meets agreed and appropriate standards which, in some cases, are superior to the lands pre-mining condition. Where the mining is underground, the surface area can be simultaneously used for forests, cattle grazing and crop raising, or even reservoirs and urban development, with little or no disruption to the existing land use. In all cases, mining is subject to stringent controls and approvals processes. In open-cut operations, however, the land is used exclusively for mining but land rehabilitation measures generally progress with the mines development. As core samples are extracted to assess the quality and quantity of coal at a site, they are also analysed to assess the ability of the soil or subsoil material to support vegetation. Topsoils are stripped and stockpiled prior to mining for subsequent dispersal over rehabilitated areas. As mining ceases in one section of the open-cut, the disturbed area is reshaped. Drainage within and off the site is carefully designed to make the new land surface as stable as the local environment allows: often dams are built to protect the area from soil erosion and to serve as permanent sources of water. Based on the soil requirements, the land is suitably fertilised and revegetated. The coal industry should be abandoned in favour of alternative energy sources because of the environmental damage it causes.
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【简答题】白喉属于
【单选题】白喉属于
A.
脓肿
B.
蜂窝织炎
C.
卡他性炎
D.
积脓
E.
纤维素性炎
【单选题】白喉属于
A.
浆液性炎
B.
纤维素性炎
C.
化脓性炎
D.
卡他性炎
E.
出血性炎
【单选题】白喉属于?
A.
浆液性炎
B.
纤维素性炎
C.
化脓性炎
D.
出血性炎
【判断题】可变现净值是指在正常生产经营过程中以预计售价减去达到可销售或可使用状态需要支付的费用。( )
A.
正确
B.
错误
【判断题】可变现净值是指在正常生产经营过程中,以预计售价减去进一步加工成本和销售所必须的预计税金、费用后的净值。( )
A.
正确
B.
错误
【单选题】( )是指在正常生产经营过程中以预计售价减去进一步加工成本和销售所必需的预计税金、费用后的净额。
A.
净值
B.
公允价值
C.
可变现净值
D.
历史成本
【单选题】某公司2015年初所有者权益为1.5亿元,2015年末扣除客观因素影响后的所有者权益为1.75亿元。该公司2015年的资本保值增值率是( )。
A.
16.67%
B.
14.29%
C.
92.30%
D.
116.67%
【单选题】白喉属于:
A.
以血浆渗出为主的炎症
B.
以纤维蛋白渗出为主的炎症
C.
以疏松组织内广泛中性粒细胞的浸润为主的炎症
D.
以局限性化脓为主的炎症
E.
以中性粒细胞浸润为主的炎症
【判断题】可变现净值是指在正常生产经营过程中,以预计售价减去进一步加工成本和预计销售费用以及相关税费后的净值
A.
正确
B.
错误
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