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   6627篇
  免费   90篇
  国内免费   5篇
教育   4477篇
科学研究   787篇
各国文化   49篇
体育   593篇
文化理论   28篇
信息传播   788篇
  2022年   41篇
  2021年   69篇
  2020年   108篇
  2019年   166篇
  2018年   211篇
  2017年   212篇
  2016年   202篇
  2015年   127篇
  2014年   160篇
  2013年   1133篇
  2012年   153篇
  2011年   152篇
  2010年   135篇
  2009年   127篇
  2008年   152篇
  2007年   150篇
  2006年   110篇
  2005年   104篇
  2004年   90篇
  2003年   85篇
  2002年   92篇
  2001年   121篇
  2000年   149篇
  1999年   132篇
  1998年   61篇
  1997年   52篇
  1996年   67篇
  1995年   61篇
  1994年   62篇
  1993年   52篇
  1992年   111篇
  1991年   96篇
  1990年   86篇
  1989年   117篇
  1988年   82篇
  1987年   77篇
  1986年   80篇
  1985年   98篇
  1984年   71篇
  1983年   75篇
  1982年   77篇
  1981年   60篇
  1980年   65篇
  1979年   75篇
  1978年   76篇
  1977年   62篇
  1976年   61篇
  1974年   48篇
  1973年   43篇
  1969年   41篇
排序方式: 共有6722条查询结果,搜索用时 15 毫秒
61.
Biodiversity science in China has seen rapid growth over recent decades, ranging from baseline biodiversity studies to understanding the processes behind evolution across dynamic regions such as the Qinghai-Tibetan Plateau. We review research, including species catalogues; biodiversity monitoring; the origins, distributions, maintenance and threats to biodiversity; biodiversity-related ecosystem function and services; and species and ecosystems’ responses to global change. Next, we identify priority topics and offer suggestions and priorities for future biodiversity research in China. These priorities include (i) the ecology and biogeography of the Qinghai-Tibetan Plateau and surrounding mountains, and that of subtropical and tropical forests across China; (ii) marine and inland aquatic biodiversity; and (iii) effective conservation and management to identify and maintain synergies between biodiversity and socio-economic development to fulfil China''s vision for becoming an ecological civilization. In addition, we propose three future strategies: (i) translate advanced biodiversity science into practice for biodiversity conservation; (ii) strengthen capacity building and application of advanced technologies, including high-throughput sequencing, genomics and remote sensing; and (iii) strengthen and expand international collaborations. Based on the recent rapid progress of biodiversity research, China is well positioned to become a global leader in biodiversity research in the near future.  相似文献   
62.
63.
64.
65.
Dawn of science     
T. Padmanabhan 《Resonance》2011,16(10):950-955
Descartes discovered the link between algebra and geometry, which forms the cornerstone of applied geometry today.  相似文献   
66.
67.
An analysis of the impact of stakeholder consultation during the conservation decision-making processes is presented. Defining and finding opportunities for stakeholder communication within conservation work is an ethical necessity when working with cultural heritage, but the limits and practice of this necessity are less clear. Case studies are used to explore which aspects of the conservation process stakeholders are most likely to be consulted about, and reviews the impact of their views. It asks whether conservators have a preference in which decisions they are prepared to share with stakeholders across three aspects of conservation: the initial appraisal, treatment and the display or storage. Where consultation relates to treatment, conservators are more likely to fall back on their own technical authority except when those consulted are regarded as fellow professionals. Other categories of stakeholder such as artists, originating communities, and religious groups were found to be more constructively consulted on the understanding of the object and on care related to display and storage. Conservators should be offered more explicit guidance on the ethics of consultation, the aspects of consultation that they should engage with and on the ethical ways to deal with conflict arising from consultation.  相似文献   
68.
Decisions about preservation issues are made both deliberatively and unconsciously. Heuristics operate as intuitive processes which are rapid and can be reliable and effective. Deliberative decisions require time to complete and can be described by an analytic-deliberative model. The characteristics of these two processes and their relevance to preventive conservation decision-making are discussed. Each of these two processes has its strengths and weaknesses. People naturally make decisions and utilise a range of strategies without necessarily having insights into the process. This paper provides a frame to help examine, describe, and reflect upon our own and others’ decision-making in order to improve both processes and outcomes.  相似文献   
69.
The purpose of this study was to evaluate two practical interval training protocols on cardiorespiratory fitness, lipids and body composition in overweight/obese women. Thirty women (mean ± SD; weight: 88.1 ± 15.9 kg; BMI: 32.0 ± 6.0 kg · m2) were randomly assigned to ten 1-min high-intensity intervals (90%VO2 peak, 1 min recovery) or five 2-min high-intensity intervals (80–100% VO2 peak, 1 min recovery) or control. Peak oxygen uptake (VO2 peak), peak power output (PPO), body composition and fasting blood lipids were evaluated before and after 3 weeks of training, completed 3 days per week. Results from ANCOVA analyses demonstrated no significant training group differences for any primary variables (P > 0.05). When training groups were collapsed, 1MIN and 2MIN resulted in a significant increase in PPO (?18.9 ± 8.5 watts; P = 0.014) and time to exhaustion (?55.1 ± 16.4 s; P = 0.001); non-significant increase in VO2 peak (?2.36 ± 1.34 ml · kg?1 · min?1; P = 0.185); and a significant decrease in fat mass (FM) (??1.96 ± 0.99 kg; P = 0.011). Short-term interval exercise training may be effective for decreasing FM and improving exercise tolerance in overweight and obese women.  相似文献   
70.
残障儿童的父母.是孩子一生最好的教育者,因为他们在孩子成长的过程中无私奉献,恪尽责任。对那些有残障儿童的家庭而言.“知识就是力量”这句话就是真理。这些家长需要掌握关于残障症状的特点、教育治疗方案和策略等信息,以提升日常生活质量。家长们也想知道什么样的服务最适合孩子.如何获得这些服务.如何定位家长角色以确保孩子的进步.[第一段]  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