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本文以高三地理教学为例,着重阐释了用新课程的视角重新审视地理双基的基本观点,阐述了分析筛选地理主干知识的具体方法,以及地理学科读图的规范和技巧,并从完善认知层次、分析主导因素、注重知识内化、形成迁移能力、培养辩证思维、讲究科学表述等方面论述了高三地理的复习教学策略。 相似文献
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地理高考命题注重考查学生基础知识、基本技能的掌握和综合运用所学知识分析、解决问题的能力。高三地理复习课需要抓好地理基础知识和基本技能的落实。文章以"城市化"一节课堂教学为例,对其"双基"落实的有效性进行分析,讨论提高课堂教学的有效性。 相似文献
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陈庆军 《亚热带资源与环境学报》2003,18(1):60-62
高考改革从"知识立意"向"能力立意"的转变对教学提出了新要求.如何整合高中系统地理和初中区域地理,使两者有机结合?高三地理该如何复习?作者受MBA案例教学的启发,多年来一直在进行这方面的探索,实践证明"原理加实例"进行高三地理复习是一种切实可行的新模式. 相似文献
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思维离不开一定的知识,培养地理思维应以一定的地理学科的基础知识为前提。进入高三阶段,学生已经具备了一定的地理知识,然而这些知识如果在课堂上由教师重新灌输、学生机械回顾,那么课堂会被教师的声音所占据,课后学生仍然会遇到很多做不出的地理问题。但是如果知识是学生思维的产物, 相似文献
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传统的高三地理二轮复习常以专题、微专题的形式构建知识体系,以机械化的“题海”战术为复习手段,这使得学生在解决真实复杂情境问题时的能力不足,难以适应新高考的要求。本文以两道高考真题为例,通过精选适合“再情境化”的母题、整合母题“再情境化”素材、重构层进性的主题式问题链和构建知识体系等环节,阐释试题情境“再情境化”在高三地理主题式复习中的应用策略,以期为高三地理二轮复习提供教学实践经验。 相似文献
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试卷讲评课是高三地理教学中常见的一种课型,其主要目标在于让学生通过测试讲评发现自己在知识点、解题能力、解题思路等方面存在的问题,并加以纠正,以弥补知识和能力的缺陷,提高分析问题和解决问题的能力。高考前夕,高三地理一、二轮复习课基本结束,绝大多数学校采用综合试卷练习的方式来提高学生的解题和知识运用的能力,因此,试卷讲评课的成效很大程度上决定了高三最后阶段复习的成败。但是,要真正上好一节试卷讲评课也并不是容易的,往往会出现教师在试卷讲评课中一言堂、就题论题等现象, 相似文献
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由人民教育出版社地理社会室编写，人民教育出版社出版的现行高三地理选修课本，是建国以来中学地理教材改革的重大举措。它以初中区域地理和高一系统地理为基础，一方面吸取了原教材的许多成功经验，另一方面注意克服原教材的不足，针对高三学生的特点使教材更系统，更具综合性，同时，在加强国情知识教育、培养和发展学生能力、加强直观性和教材的可读性、激发学生兴趣等方面作出了有益的探索。 相似文献
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试卷讲评课的有效性高低是影响整个高三地理教学质量,甚至学生高考成绩的重要因素。从分析当前高三地理试卷讲评课中的一些无效、低效的教学行为入手,提出运用“双主”教学模式来构建高三地理试卷讲评课的构想,并从理论及教学实践上进一步阐述该方案对于提高试卷讲评的有效性的作用,以期找到提高高三地理试卷讲评课质量的有效途径。 相似文献
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进入高三复习阶段以来,教师和学生所面临的较多状态是练习、考试与讲评。地理习题讲评是提高地理复习质量很重要的环节。积极高效的讲评有利于学生学习薄弱环节的解决,也有利于学生错误知识的纠正,更有利于学生综合能力的提高。有效地评讲也使高三地理教师综合业务素质得到培养和提高。 相似文献
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高三地理课堂教学是在学生已经学习过的知识体系下,以巩固性整理为基础,升华性提高为重点的教学。这一阶段课堂教学的特性决定了其课堂结构有别于高一、高二新课教学的课堂结构。我校地理组根据高三课堂教学的任务特点,在借鉴了大量新型课堂教学结构的基础上,经过不断的实践探索和完善后,提出了＂定向、自查、探究、训练、构建＂五环节课堂结构教学模式,以期实现高三课堂教学的优质高效。 相似文献
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We examine the sequence of changes in the structure of the geosystems of the Primorsky Range (Baikal region) for the last 6000 years, based on a continuous recording of fluctuations of the vegetation reconstructed from spore-pollen complexes of a high peat bog. We determined the chronological timeframe of paleogeographical events. The study showed that there occurred a radical structure transformation of the geosystems in the mid-late Holocene, along with a recurrence of similar landscape transformations caused by the instability of natural conditions. 相似文献
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Eugene V. Artyushkov 《Geophysical Journal International》1984,76(1):173-178
Summary. It is known that flow in the mantle can produce preferred orientation in olivine crystals with seismic anisotropy as a consequence. Flow in the subcrustal lithosphere is unlikely because of the high viscosity. Lenses of high temperature and low-viscosity ( anomalous mantle ) are located under the crust in many tectonically active regions, and viscous flow can easily arise in such material resulting in seismic anisotropy. After cooling, such anomalous mantle acquires high viscosity and becomes incorporated into the lithospheric layer preserving the anisotropy produced by the flows which existed previously. The interaction of the stresses with cracks in the upper crust can be one of the causes of anisotropy in this layer. 相似文献
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我国北方东起黑龙江省嫩江地区, 吉林白城地区及辽宁西部, 包括内蒙兴安盟东南、哲里木、昭乌达、锡林郭勒、乌兰察布、伊克昭等盟的大部地区, 直至河北坝上、陕西榆林北部约26.7万平方公里的幅员范围内, 由于自然条件的特殊性(地表组成物质质地松散、沙粒成分比重很大及气候干旱、多大风, 且年内季风与周期性干旱相吻合), 加上人类不合理开发活动的影响, 成为我国目前沙漠化发展最活跃的地区, 其沙漠化土地近16.5万平方公里, 占全区总面积的61.5%。该地区有较长的经济开发史, 农、牧业相互影响, 交错分布的情况, 在历史上业已形成。据粗略统计, 该区范围内, 有旱作耕地近5, 000万亩, 多以传统的粗放的撂荒种植制进行经营, 长年遭受不同程度的风沙危害, 属于生产水平较为低下的农田类型。这些农田急待整治, 以便提高生产力。由于本区年均降水量在350-450毫米之间, 客观上具有发展旱作农业的可能性。如能合理经营、科学利用其自然资源, 将可能发展成为农、牧业结合的发达地区。从而对我国北方地区农业发展起促进作用。为了深化对沙漠化农田的认识, 揭示其生态失调的实质, 本文将就生态系统观点对其进行分析以寻求有效的整治沙漠化农田的途径。 相似文献
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Summary. Previous geomagnetic measurements in the Rhinegraben have led us to assume that the responsible currents have the properties of direct currents and that they all flow in the sediments filling the graben. In order to verify these conclusions, we have performed measurements in a mine at a depth of 650 m. By comparing the field simultaneously recorded at the surface, in the mine and at the reference station, it is possible to deduce that the anomalous currents have the above mentioned properties. 相似文献
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城市化的开发区模式研究 总被引：14，自引：1，他引：13
我国许多城市通过开发区建设,在短时间内完成了产业和人口的集聚,实现了城市地域空间和人口规模的跳跃性增长和产业结构的转型。由于在这种城市空间增长过程中,开发区建设起了决定作用,因此,这种以开发区带动整个地区城市化的方式可称为"开发区模式"。开发区驱动城市化的机制表现在开发区自身区域的城市化和开发区带动周围农村地区城市化两个层面,并具有快速跳跃性、外驱性和不稳定性、人为性、经济增长模式的单一性和基础设施建设的高标准性等特征。针对开发区建设中出现的问题,提出了促进其健康发展的建议。 相似文献
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L. M. Sorokovikova V. N. Sinyukovich I. V. Tomberg G. I. Popovskaya N. V. Bashenkhaeva N. P. Sez’ko N. A. Zhuchenko 《Geography and Natural Resources》2016,37(3):220-227
Field observations showed that the characteristics of chemical composition of waters and the development of plankton algae in the lakes within the delta of the Selenga river are determined by their flowage. The most open Lake Nekipelovskoe communicates with the Selenga outlets throughout a year, and Lake Zavernyaikha only at the period of an open channel. Lake Semenovskoe and Lake Khlystov Zaton are located in the islands and are isolated from the outlets. According to composition of main ions, the lakes under investigation refer to the hydrocarbonate class, the calcium group. The sum of ions in the water of Lake Nekipelovskoe approaches the one in the Selenga (86?221 mg/dm3), and the highest sums of ions were recorded in the wintertime in the lakes isolated from the outlets (446?743 mg/dm3). The lakes of the delta are characterized by a high trophicity. The maximum concentrations of total phosphorus in Lake Nekipelovskoe and Lake Zavernyaikha were 68 and 122 μg mg/dm3, and in Lake Semenovskoe and Lake Khlystov Zaton ?0.8 and ?0.63 μg mg/dm3, respectively. The most intense development of algae is observed in Lake Zavernyaikha, which is due to the high population of Baikal endemics. Lake Zavernyaikha showed a close negative correlation between the concentration of NO 3 ? , mineral phosphorus and phytoplankton biomass; the correlation coefficient was ?0.8 and ?0.63, respectively. The lakes exhibited increased contents readily hydrolysable organic matter, and a decrease in dissolved oxygen concentration in winter; hydrogen sulfide was repeatedly recorded in Lake Khlystov Zaton. The water quality in the lakes during the springtime varies from “quite clean” to “weakly polluted”; at low-water periods, especially in winters, it can drop to the category of “exceedingly dirty”. The water quality of the Selenga can be influenced by the lakes during spring floods when material accumulated during the wintertime is transported to the river outlets and further to Lake Baikal. 相似文献
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《Geography and Natural Resources》2008,29(2):132-136
The influence of air emissions from the enterprises of the city of Norilsk on the vegetation cover of adjacent territories was revealed. The categories of resistance of some plant species and communities to technogenic loads have been ascertained. The protective role of overmoistening of habitats was observed for plants. 相似文献