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   8079篇
  免费   709篇
  国内免费   319篇
  2024年   21篇
  2023年   151篇
  2022年   91篇
  2021年   150篇
  2020年   341篇
  2019年   380篇
  2018年   354篇
  2017年   391篇
  2016年   321篇
  2015年   246篇
  2014年   299篇
  2013年   1032篇
  2012年   158篇
  2011年   276篇
  2010年   250篇
  2009年   334篇
  2008年   393篇
  2007年   435篇
  2006年   448篇
  2005年   366篇
  2004年   316篇
  2003年   248篇
  2002年   204篇
  2001年   148篇
  2000年   121篇
  1999年   133篇
  1998年   101篇
  1997年   88篇
  1996年   68篇
  1995年   70篇
  1994年   49篇
  1993年   48篇
  1992年   35篇
  1991年   22篇
  1990年   24篇
  1989年   28篇
  1987年   16篇
  1985年   129篇
  1984年   127篇
  1983年   105篇
  1982年   87篇
  1981年   66篇
  1980年   73篇
  1979年   66篇
  1978年   94篇
  1977年   56篇
  1976年   45篇
  1975年   31篇
  1974年   24篇
  1973年   28篇
排序方式: 共有9107条查询结果,搜索用时 15 毫秒
981.
“以毒攻毒”与中西医结合研究   总被引:8,自引:2,他引:6  
“以毒攻毒”是中医药学一个重要医理和治则。本文介绍了国内外有关“以毒攻毒”的研究进展,以及具有“以毒攻毒”特点的医药研究状况。特别是德国细菌学家贝林等,研制成功破伤风和白喉抗毒素。我国学者张亭栋教授与陈竺教授,继承发掘中药砒霜治疗世界性难治病—急性早幼粒细胞白血病,取得国际领先水平的科研成果等等,表明中西医结合研究是继承发展中医药学的有效方法和途径。  相似文献   
982.
管理者影响策略的结构   总被引:2,自引:0,他引:2  
本研究根据中国企事业组织内管理者对他人发挥影响力的特点 ,选取反映中国文化的影响计策编成题目 ,并与西方背景下构建的组织影响策略量表汇编成问卷。 2 1 8位中国管理者用汇编的问卷评定他们与直接上司和直接下属在工作中相处时使用这些计策的频率。结果发现 ,在因素水平有“应变控制”和“温情说服”两个正交因素。这两个因素跨影响方向一致。对各因素内的题目做聚类分析 ,发现大多数聚类的内容跨影响方向的一致性不高。与西方的组织策略量表对照 ,因新题目的加入 ,汇编的影响计策量表内的聚类更好地反映了中国管理者使用影响计策的特点。  相似文献   
983.
Nelson  George C. 《Studia Logica》1998,60(3):343-355
Many results concerning the equivalence between a syntactic form of formulas and a model theoretic conditions are proven directly without using any form of a continuum hypothesis. In particular, it is demonstrated that any reduced product sentence is equivalent to a Horn sentence. Moreover, in any first order language without equality one now has that a reduced product sentence is equivalent to a Horn sentence and any sentence is equivalent to a Boolean combination of Horn sentences.  相似文献   
984.
The current generation of working parents faces new challenges to the traditional family model. Despite this, they select forms of home-based child care more than any other type of care. Prior data also reveal that parents who use home-based care, center-based care, and family day care all cite quality as the primary reason for their choice. Given the similarity of reason and the difference in care actually used, working parents who use home-based care were interviewed on additional reasons for their choice. These parents lacked confidence in center-based care and preferred their children to receive one-to-one attention. Age of child, cost of care, and availability of centers did not affect choice. These adults seem to be selecting home-based care in an attempt to provide care as close as possible to parental care. They are making a statement on the importance of the home environment even as their participation in the workplace increases.  相似文献   
985.
During the past decade, there has been an increase in the diagnosis and treatment of Attention-Deficit Hyperactivity Disorder (ADHD). This syndrome, typically diagnosed in childhood, is characterized by inattention, hyperactive motor behavior, and distractibility. Current prevalence rates obtained in various countries generally exceed the 3–5% reported by DSM-IV. Reasons for increased ADHD prevalence include changes in diagnostic standards, overlap between ADHD and other externalizing disorders, nonspecific behavioral criteria, and the rapid effects of stimulant medication on cognitive functioning. However, social, cultural, and economic factors may also contribute to increased diagnosis. ADHD has become a common topic in the lay media. Popular discussions of ADHD may serve as a metaphoric expression of social anxieties, particularly with respect to children. At the same time, ADHD has rapidly become incorporated into a medical model, with emphasis on pharmacological treatment. Reductions in mental health and educational services, as well as economic pressures of managed care, may also contribute to medicalization of behavioral problems. Collaboration between psychologists and primary care physicians can lead to more accurate diagnosis and appropriate treatment of ADHD and related disorders.  相似文献   
986.
Schmidt and Egler's critique of Christianity's exclusivist claimto truth rests on two suppositions: (a) that inter-religiouspastoral care for dying patients requires a respect for theircultural backgrounds which necessitates accepting the equalvalidity of their respective (non-Christian) religions, and(b) that exclusivism is incompatible with the Christian love-of-neighborcommandment. In opposition to this critique, (a) the authors'own "pluralist" understanding of Christianity is refuted ontwo levels. First, it leads to inconsistencies in the authors'own (and very adequate) understanding of pastoral care, especiallywith regard to their notion of intolerance, and second, it isirreconcilable with explicit New and Old Testament claims toabsoluteness. In addition, (b) the authors' understanding ofthe way in which "exclusivism" justifies intolerance and missionaryviolence is shown to rest, first, on a secularized reductionof Christianity, i.e., of Christians' own "religious identity"as well as of the Christian way of "helping those in need,"and second, on a merely theoretical (rather than also practical)view of Christians' commitment to God. As a corollary to thatrefutation, a reconsideration of the truly Christian sourcesof obedience and charity is recommended.  相似文献   
987.
The basic (negative and positive) methodological maxims of three currents of philosophy of science (logical empiricism, falsificationism, and postpositivism) are formulated. Many of these maxims (stratagems) are controversial, e.g., the stance about the nonsense of metaphysics, and that of its indispensability. The restricted validity of these maxims allows for their unification. Within the framework of most of them there may be a relationship of (synchronic, or diachronic) subordination of the contradicting desiderata. In this vein ten stratagems are formulated. This revised version was published online in August 2006 with corrections to the Cover Date.  相似文献   
988.
本研究以现代教育心理学体系为框架,采用资料整理法,对梁启超的学习心理学思想进行了分析归纳。从中可以看出,梁启超重视学习兴趣,并把无所为、不息、深入研究、找朋友作为保持兴趣的方法;认为做学问的人应具备明敏、密察、别裁、通方等能力和忠实、深切、敬慎、不倦的习惯;并总结出了立志、善观、持敬、明义理、养成读书兴趣等学习方法。  相似文献   
989.
Significant relationships between the Holland Vocational Preference Inventory (VPI) and the Strong Vocational Interest Blank (SVIB) were again empirically demonstrated in this study, and conversion equations were developed to use standard scores of SVIB scales, rather than items, to produce estimates of VPI scores. Cross validation on a limited population yielded supportive evidence that these conversion equations can provide meaningful VPI estimates from SVIB scale scores. The need for validation across a variety of populations was underscored in order to assess further generalizability of these findings.  相似文献   
990.
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