共查询到20条相似文献，搜索用时 468 毫秒
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离子晶体中阴、阳离子之间因诱导偶极而产生离子极化.一些18电子或18+2电子构型的阳离子与阴离子之间存在附加极化作用,与无机含氧酸根离子结合的H+对中心成酸原子还存在反极化作用.离子极化作用、附加极化作用和反极化作用与化合物的结构、性质有密切的联系,尤其对P区非金属含氧酸盐的溶解性、水解性、热稳定性和氧化还原性质等产生了显著的影响. 相似文献
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离子极化理论是无机化学中的一个基本理论.本文介绍离子极化理论,并就离子极化理论在无机化学中的应用作一探讨. 相似文献
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唐志华 《陕西理工学院学报(社会科学版)》1994,(Z1)
针对现行《无机化学》统编教材讨论“离子极化与化合物颜色的关系”时存在的一些问题,作了初步探讨,阐述了术语“颜色深浅”的含义,提出了用离子极化观点解释物质颜色时应注意的问题. 相似文献
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本文论述了离子极化理论定量化的进展,并提出了离子极化的一个新的定量标度=化合物的离子极化度G,给出了其定义,计算公式,并用离子极化度数据解释了一系列离子化合物的结构与性能的关系,取得了与事实基本相符合的结论。 相似文献
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Knud Illeris 《International Journal of Lifelong Education》2013,32(1):15-28
This article is a combined result of a three years research project on low‐skilled learners’ experiences as participants of various kinds of adult training and education in Denmark, and the findings of a three years research consortium on workplace learning, summing up and generalizing our various findings as to how low‐skilled adults function in relation to participation in training and education activities, how they feel about it, what is important to them, and consequently what works in practice in relation to this very important but often neglected group of adult learners. 相似文献
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XU Lijiao 《读与写:教育教学刊》2008,5(8)
Without doubt,differences between teaching General English and ESP do exist.For teachers new to ESP,the quest ion of what they can do to improve his or her knowledge of specialist subjects is perhaps one of the first issues that they are likely to face. 相似文献
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本文通过对“卡夫丁峡谷”思想的阐述 ,并对马克思的跨越卡夫丁峡谷思想做理论说明 ;从而揭示了该理论与我国的社会主义革命和建设的内在联系及指导意义。 相似文献
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就浙江省中学物理教师师资队伍及其专业素养(包括教师专业知识、专业技能与专业情意等)进行了调查,对其调查结果进行了分析。指出实然与应然之距离——特别表现在教师的反思能力与反思策略及教育智慧上的差距,进而在关于培训现状调查的基础上提出两点建议。 相似文献
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刑法司法解释主体探析 总被引：2，自引：1，他引：2
马松建 《河南师范大学学报(哲学社会科学版)》2004,31(1):74-77
根据有关法律规定，刑法司法解释的主体为最高人民法院和最高人民检察院，但实际上有诸多不具备刑法司法解释主体资格者参与刑法司法解释。理论上关于刑法司法解释主体存在不同认识。本文认为，可以从应然和实然两个不同的视角，以及刑法司法解释是否具有规范性等，将刑法司法解释主体分为刑法司法解释的实然主体与应然主体以及规范性刑法司法解释主体与个案刑法司法解释主体。 相似文献
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改革开放以来，河北省中小学教育科研工作取得了长足发展，具有了一定的规模，形成了自身特色，开展了形式多样的科研活动，取得了较显的成效，但与其他先进省市相比，与教育发展的需求相比还存在着较大的差距与不足，还需在各个方面加大力度。 相似文献
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The Secretary's Advisory Committee on Genetic Testing (SACGT) was established by the U.S. Secretary of Health and Human Services, Donna E. Shalala, to provide a public forum for the formulation of policy advice in the complex and growing area of genetic testing. After a careful nomination and selection process, the Secretary announced the appointment of thirteen advisors to the SACGT in June 1999. The first meeting of the SACGT was held June 30, 1999. This article describes the purpose, formation, and function of the SACGT. Before addressing these questions about the role of the SACGT, we first will explain what genetic testing is, how it is currently used, and what new uses it may be put to in the future. 相似文献
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When any innovations or measurement procedures are introduced into the education system to improve or judge the quality of its teaching force, beginning teachers often have to adapt to these new concepts of what constitute a high quality teaching. This article contends that these new concepts neither necessarily match beginning teachers’ own conceptions about their own competency nor has it given beginning teachers a chance to be heard. This study provides an opportunity for beginning teachers’ ‘voices’ to be heard through phenomenography which is an interpretive research approach to discover what beginning teachers in Malaysia conceive and understand as competence in relation to what they do every day as teachers. The main finding of this study is the key role played by beginning teachers’ conceptions of competency which has provided strong implications for educational policies and teacher education. The findings suggest that teachers need to be represented in any quality improvement measures. Careful attention should also be paid to the school systems and to teacher training programmes to support and encourage teachers in their professional growth as competent teachers. 相似文献
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苑秀丽 《淮阴师范学院学报(哲学社会科学版)》2000,(6)
监督是中国社会主义民主政治中的一项重要内容 ,从孙中山的五权分立 ,到毛泽东的共产党与民主党派的互相监督 ,再到邓小平的制度与法律建设 ,中国的民主监督思想走过了一个漫长的过程。对监督而言 ,法律与制度固然重要 ,但更为重要的 ,是中国国民监督意识的培养 ,这是目前我国监督思想发展中的最大障碍 相似文献
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Ethnographical mapping of thick places – teaching and learning practices in teacher training schools
Mikael Jonasson 《Ethnography and Education》2019,14(1):16-33
The aim of this study is to use an ethnographic method in order to map where understandings of teaching and learning practices (TaLP) are being discussed in three schools. The questions posed are: what are the relations between thick places, meaning, affect, and TaLP? This study uses an ethnographic method outside the classroom and in between different activities as a starting point for understanding TaLP and where many students at the same school produce thick places of affect and meaning. The main conclusion from this study is that matters of where, what, and who are shaping TaLP. Another important conclusion from this study is that training schools offer new conditions for teacher students, but also offer new opportunities for ethnographic studies that aim at understanding these school environments with a range of new questions. 相似文献