题目内容
Directions: Study the following picture carefully and write an essay to 1) describe the picture, 2) deduce the purpose of the drawer of the picture, and 3) suggest counter-measures. You should write about 160—200 words neatly on ANSWER SHEET 2.
查看答案
搜索结果不匹配？点我反馈
更多问题
2 Climatic conditions are delicately adjusted to the composition of the Earth’s atmos phere. If there were a change in the atmosphere—for example, in the relative proportions of atmosphere gases—the climate would probably change also. A slight increase in water vapor, for instance, would increase the hem-retaining capacity of the atmosphere and would lead to a rise in global temperatures. In contrast, a large increase in water vapor would increase the thickness and extent of the cloud layer, reducing the mount of solar en ergy reaching the Earth’surface. The level of carbon dioxide, CO2 in the atmosphere has important effect on climatic change. Most of the Earth’s incoming energy is short-wavelength radiation, which tends to pass through atmospheric CO2 easily. The Earth, however, reradiates much of the re ceived energy as a long-wavelength radiation, which CO2 absorbs and then remits toward the Earth. This phenomenon, known as the greenhouse effect, can result in an increase in the surface temperature of a planet. An extreme example of the effect is shown by the Ve- nus, a planet covered by heavy clouds composed mostly of CO2, whose surface tempera tures have been measured at 43℃. If the CO2 content of the atmosphere is reduced, the temperature falls. According to one respectable theory, if the atmospheric CO2 concentra tion were halved, the Earth would become completely covered with ice. Another equally respectable theory, however, states that a halving of the CO2 concentration would lead only to a reduction in global temperatures of 3℃. If, because of an increase in forest fires or volcanic activity, the CO2 content of the atmosphere increased, a warmer climate would be produced. Plant growth, which relies on both the warmth and the availability of CO2, would probably increase. As a consequence, plants would use more and more CO2，Eventually CO2 levels would diminish and the cli mate, in turn, would become cooler. With reduced temperatures many plants would die; CO2 would thereby be returned to the atmosphere and gradually the temperatures would rise again. Thus, if this process occurred, there might be a long-term oscillation in the amount of CO2 present in the atmosphere, with regular temperature increase and decrease of a set magnitude. Some climatologists argue that the burning of fossil fuels has raised the level of CO2 in the atmosphere and has caused a global temperature rise of at least 1℃. But a supposed global temperature rise of 1℃ may in reality be only several regional temperature increase, restricted to areas where there are many meteorological stations and caused simply by shifts in the pattern of atmospheric circulation. Other areas, for example the Southern Hemi sphere oceanic zone, may be experiencing an equivalent temperature decrease that is unrec ognized because of the shortage of meteorological recording stations. The author refers to the Venus primarily in order to______.
我国人口老龄化现象日趋严重2．人口老龄化给社会、家庭带来越来越多的负担3．如何妥善解决人口老龄化问题 Aging of the Population
某环境设备工程公司为在国内外激烈的市场竞争中更加规范、规模化发展，新成立了法律事务部，他们认真学习了《产品质量法》并以此为依据对公司有关活动做出规范，以尽可能规避质量风险，同时公司有关部门明确了自己的责任和权益。 企业承担产品责任的前提是( )。
某机械制造厂从事齿轮加工业务，设有销售部、生产部、检验部、采购部、技术部、质量部等部门。某机床厂是其主要顾客之一。为加强质量管理，提高齿轮加工质量水平，增强顾客满意和市场竞争力，厂领导决定向某认证机构申请质量管理体系认证，该厂认命了管理者代表，按照相应国家标准建立了质量管理体系，编制了质量手册、程序文件和作业指导书等质量管理体系文件，经过一段时间的质量管理体系试运行，认证机构派出审核组到该厂进行现场审核。 机械制造厂要依据( )标准获得质量管理体系认证。
微信支付 
支付宝支付