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精准设计“问题焦点”促进学生自主提问 被引量:1
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作者 杨娟 《江苏教育研究》 2022年第16期72-76,共5页
培养批判性思维很重要的一条路径就是让学生学会提问,而在教会学生提问的教学实践中,学生提问普遍存在“散”“乱”“浅”等问题。“问题焦点”是与教学目标高度相关的“话题点”,可以引导学生进行发散式提问、深度式提问。在生物学教学... 培养批判性思维很重要的一条路径就是让学生学会提问,而在教会学生提问的教学实践中,学生提问普遍存在“散”“乱”“浅”等问题。“问题焦点”是与教学目标高度相关的“话题点”,可以引导学生进行发散式提问、深度式提问。在生物学教学中,促进学生提出优质问题的基本策略包括:明确学生提问应该遵守的规则,运用“问题转换”促使学生完善问题,围绕“问题焦点”引导学生甄选问题。 展开更多
关键词 批判性思维 “问题焦点” 自主提问
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Influence path and effect of climate change on geopolitical pattern 被引量:8
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作者 王礼茂 顾梦琛 李红强 《Journal of Geographical Sciences》 SCIE CSCD 2012年第6期1117-1130,共14页
Marked by the UN Climate Change Conference in Copenhagen 2009, climate change is shaping the new pattern for future geopolitics with unprecedented drive. Climate change has surpassed the category of pure environment p... Marked by the UN Climate Change Conference in Copenhagen 2009, climate change is shaping the new pattern for future geopolitics with unprecedented drive. Climate change has surpassed the category of pure environment problem and become a focal issue in international relations. Driven by climate change, new changes have taken place in the evolution of geopolitical pattern. (1) Geopolitical contention expands into new fields and regions. (2) Measures and tools of geopolitical contention become more diversified. (3) Main bodies of geopolitical gambling are divided into different groups. With the development of politicization, climate change has become the significant driving force that can influence the evolution of geopolitical pattern. Measures, sphere and contents of geopolitical contention changed dramatically, carbon emission permits, carbon tariff and new energy technology turned into the key points of geopolitical contention. Climate change acts on the evolution of geopolitical pattern through three main paths: "Feedback effect", "Trace back effect", and "Ripple effect", and they exert influence on geopolitical pattern with three impacts: "Depression effect", "Traceability effect", and "Diffusion effect". We draw several conclusions from the analysis: (1) Climate change gradually becomes one of the most active driving forces to impact on the evolution of geopolitical pattern in the present world and it diversifies the geopolitical targets. (2) Climate change generates new geopolitical tools. The developed countries use climate change as a "Lever" to pry strategic resources like energy and grain and the geopolitical means are in a more secretive way. (3) Low-carbon technology, with new energy technology as the core, becomes the key factor of geopolitical influence and power transition. Those who can take advantage of new energy technologies will occupy the leading position in future's climate change negotiations and geopolitical competition. 展开更多
关键词 climate change GEOPOLITICS influence path influence effect
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Solution of Center-Focus Problem for a Class of Cubic Systems
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作者 Bo SANG Chuanze NIU 《Chinese Annals of Mathematics,Series B》 SCIE CSCD 2016年第1期149-160,共12页
For a class of cubic systems, the authors give a representation of the n th order Liapunov constant through a chain of pseudo-divisions. As an application, the center problem and the isochronous center problem of a pa... For a class of cubic systems, the authors give a representation of the n th order Liapunov constant through a chain of pseudo-divisions. As an application, the center problem and the isochronous center problem of a particular system are considered. They show that the system has a center at the origin if and only if the first seven Liapunov constants vanish, and cannot have an isochronous center at the origin. 展开更多
关键词 Center variety Isochronous center Center conditions Integrating factor
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