首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   779篇
  免费   13篇
  792篇
  2024年   2篇
  2023年   6篇
  2022年   5篇
  2021年   6篇
  2020年   40篇
  2019年   39篇
  2018年   35篇
  2017年   28篇
  2016年   42篇
  2015年   13篇
  2014年   24篇
  2013年   155篇
  2012年   39篇
  2011年   64篇
  2010年   23篇
  2009年   47篇
  2008年   36篇
  2007年   52篇
  2006年   29篇
  2005年   12篇
  2004年   17篇
  2003年   18篇
  2002年   14篇
  2001年   15篇
  2000年   6篇
  1999年   1篇
  1998年   3篇
  1997年   2篇
  1996年   3篇
  1995年   2篇
  1994年   2篇
  1993年   4篇
  1991年   1篇
  1988年   1篇
  1984年   1篇
  1981年   1篇
  1980年   1篇
  1979年   2篇
  1978年   1篇
排序方式: 共有792条查询结果,搜索用时 0 毫秒
11.
新中国成立初期中南区婚姻制度的改革   总被引:1,自引:0,他引:1  
新中国成立前后,中南区由于长期受封建婚姻制度的束缚,各种陋俗在许多地方普遍存在,广大妇女的社会地位极其低下。1950年《中华人民共和国婚姻法》颁布施行后,中南区在全区范围内大张旗鼓地开展了一场宣传和贯彻《婚姻法》的群众运动,经过调查试验、宣传发动和总结表彰,彻底地摧毁了封建婚姻制度,建立起了新民主主义的新型婚姻制度,形成了男女平等、民主和睦的社会新风尚,从而促进了中南区整体性的社会文明与进步。  相似文献   
12.
中国农民工问题研究述论   总被引:1,自引:0,他引:1  
进入21世纪以来,"农民工"问题渐成为学术关注的焦点之一。从现状与对策角度进行的研究较多,从历史角度进行的研究有待加强。目前学界围绕农民工的定义、"农民工"现象的起源、农民工问题的历史发展及其处理对策变迁、解决农民工问题的深层次困难、解决农民工问题的前景与基本思路,展开了有关讨论。由于"农民工"在我国城镇化、工业化与现代化进程中将长期存在,因此,"农民工"问题将持续成为学术关注的热点问题。  相似文献   
13.
The extent to which Francisco Antonio Moreno y Escandón’s plan of the Viceroyalty of Santafé sparked a revival of cartographical activity has hitherto been overlooked. The Viceroyalty of Santafé was created as a major unit in the Spanish Empire in 1739 and included the present-day countries of Colombia, Ecuador, Venezuela and Panama. Moreno, a high-standing Creole functionary, mapped the region in 1772 in the context of its administrative organization. By drawing attention to Moreno’s official map, I hope to encourage the study of late-colonial and early-republican cartography of the northwestern part of the former Spanish-American dominion and the present-day constituent republics.  相似文献   
14.
    
The refining of silver ores in New Spain was defined by the chemical nature of the silver ore. Argentiferous galena (lead sulphide) could only be refined by smelting (36% silver produced), irrespective of silver content, and amalgamation (64%) could only be applied to the silver sulphide ores. Both processes were transferred from Europe, but amalgamation was transformed by local expertise from a recipe of limited application to an industrial-scale solution for refining sulphidic silver ores. Its implementation shaped the environmental history of colonial silver refining in the New World. Mercury was consumed mainly through its chemical conversion into calomel, with minimal emissions of volatile mercury. Waste silt and liquid mercury in the soil and waterways were its main legacy. Smelting created a greater impact on the environment of New Spain, via lead in lead fumes as the main heavy metal issued to the air, and its depletion of woodlands. This article argues that a technical analysis of period refining practices in New Spain reorients our understanding of Spain’s imperial relations with its New World colonies, of the role of local knowledge in a global economy of silver production, and of environmental issues in colonial history. It thus speaks to the problem of unpacking the complex web of relations that composed early European imperialism, in which were enmeshed commodities such as silver, cotton and sugar.  相似文献   
15.
    
The article explores the interactions of materials, skills and gender identity through examining DIY practices in New Zealand. It traces the relationship between materials used for home repairs, the competences needed to use them and the (re)production of specific gendered identities. It argues that housing and building materials were an important part of the European settler history of the country and this history forms the context within which New Zealanders work on their houses today. Drawing on interviews with 30 Pākehā homeowners, it explores how both men and women respond to the materials of their homes, how skills are acquired in relation to the demands of the materials used and how these skills become part of the (re)production of specific white, heterosexual gender identities. The figure of the ‘Kiwi bloke’ is discussed as an important imaginary in the negotiation of gender identities for both men and women. Interviewees saw their DIY activities in the light of the creation and re-creation of this specific national and gendered identity. The article reveals the intertwining of history and materiality in the continual negotiation and contestation of gendered identities.  相似文献   
16.
    
The overarching aim of the study was to ascertain the relationship between children's perceptions of the natural environment and their subjective well-being. More specifically the study aimed to fit a structural model depicting the nature of the relationship between children's environmental views and their global, and domain-specific life satisfaction. The sample included 1004 twelve-year-old participants randomly selected from 15 primary schools in Cape Town, South Africa. The measuring instrument included the New Ecological Paradigm (NEP) Scale for children, the Students' Life Satisfaction Scale and the Personal Well-Being Index-School Children. Confirmatory factor analysis was used to test the validity of the NEP Scale which showed appropriate fit structure. A good fit structure was also found for the overall structural equation model. However, the overall model showed that children's environmental views were not related to their global life and domain-specific life satisfaction. At a foundational level, more research is required to allow for a better understanding of how children in differing circumstances construct and assign meaning to nature, and what their perceptions of nature are before we can begin to ask them when, how or why they engage in nature.  相似文献   
17.
Specific regions and places are considered particular threatening and dangerous by state authorities. There, the state regularly enacts security in harsh and violent ways. In this article, I develop a pragmatic spatial framework, inspired by and combining elements from post-statist geography and Critical Security Studies, to explain patterns of spatial security governance in regions with competing local authorities and regular violence. I particularly argue for more historical analysis on the emergence and legacies of spatial security governance to understand its persistence and consequences. I illustrate the framework with an empirical investigation of the spatial security governance of the Highland regions in Papua New Guinea, and its role as a dangerous inner “periphery” for the central state since the late colonial period. The patterns of security governance in the Highlands, like the declaration of emergency zones in case of regional warfare, the use of violent punitive expeditions by mobile forces, accompanied by a securitizing discourse, have remained remarkably similar. While the post-colonial state aimed at a break with the colonial past, the spatial security governance of the Highlands has remained an important source for the legitimization of state rule and state formation. Governing the inner “periphery” is constructed as the responsibility of the state, which has been historically entangled in the “violent geographies” in the Highlands.  相似文献   
18.
Cobalt-blue colorant was first used in the 18th Dynasty in the New Kingdom of Egypt. The source of this cobalt was cobaltiferous alum from the Western Oases of Egypt. The use of this alum, especially in glass, was suddenly limited at the end of the 18th Dynasty. There is little evidence of the production of cobalt-blue glass in the Ramesside Period (the 19th–20th Dynasties) in the New Kingdom of Egypt. In this study, we brought a portable X-ray fluorescence spectrometer to two archaeological sites located in the Memphite region and used it for onsite analyses of Ramesside cobalt blue-colored glasses and faiences. This method revealed that the compositional characteristics of the cobalt-blue colorant in these Ramesside glasses and faiences is different from the colorant derived from cobaltiferous alum used in the 18th Dynasty, based on the comparison of transition metal composition and alumina content with those of the cobalt blue-colored artifacts from the 18th Dynasty. This result suggests that a new cobalt source other than cobaltiferous alum from the Western Oases was utilized in Egypt during the Ramesside Period.  相似文献   
19.
张凤彩 《神州》2011,(3X):106-106
三维目标是相互联系、相互渗透的整体,是一个完整的人在物理学习探究活动中实现物理素养建构的三个侧面。因此,课堂教学应该全面关注三维目标,并将它整合于统一的物理教学活动过程之中。  相似文献   
20.
This study examines preservation of microfossils identified as introduced Ipomoea batatas in soils from northern New Zealand. Starch grains and xylem cells showed highly variable preservation, from good to extremely poor. For starch grains, the latter included brown-staining, expansion and distortion of the grain and vacuole, loss of the Maltese cross, pitting, cracking, fragmentation and disintegration. Degraded xylem showed similar brown-staining, occasional cracking, cross-wise fragmentation, with wall pits becoming progressively less visible or showing distortion, expansion and coalescence.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号