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   849篇
  免费   31篇
各国政治   42篇
工人农民   50篇
世界政治   83篇
外交国际关系   52篇
法律   383篇
中国政治   9篇
政治理论   251篇
综合类   10篇
  2023年   4篇
  2022年   3篇
  2021年   7篇
  2020年   16篇
  2019年   32篇
  2018年   25篇
  2017年   26篇
  2016年   29篇
  2015年   20篇
  2014年   20篇
  2013年   181篇
  2012年   24篇
  2011年   15篇
  2010年   20篇
  2009年   16篇
  2008年   28篇
  2007年   25篇
  2006年   27篇
  2005年   22篇
  2004年   18篇
  2003年   23篇
  2002年   23篇
  2001年   17篇
  2000年   12篇
  1999年   18篇
  1998年   9篇
  1997年   6篇
  1996年   11篇
  1995年   9篇
  1994年   11篇
  1993年   12篇
  1992年   13篇
  1991年   15篇
  1990年   8篇
  1989年   12篇
  1988年   8篇
  1987年   7篇
  1986年   14篇
  1985年   8篇
  1984年   17篇
  1983年   8篇
  1982年   9篇
  1981年   4篇
  1980年   5篇
  1979年   9篇
  1978年   7篇
  1977年   4篇
  1976年   3篇
  1967年   3篇
  1965年   2篇
排序方式: 共有880条查询结果,搜索用时 31 毫秒
61.
This article explores efforts to bridge multi-disciplinary research and policy engagement to tackle child poverty in the contexts of developing countries, based on the experiences of Young Lives, an international longitudinal policy-research project. It focuses on a case study involving the application of research evidence on child poverty to shape policy debates concerning Ethiopia's second-generation Poverty Reduction Strategy Paper (2006–2010). The discussion is situated within theoretical literature on the interface between knowledge, policy, and practice, which supports the conceptualisation of policy making as a non-linear dynamic process. It pays particular attention to the importance of understanding the political and policy contexts of Southern countries, rather than assuming that they should simply import Northern-derived models of advocacy. It concludes by identifying general lessons for translating research into social-policy change.  相似文献   
62.
63.
Chloroquine concentrations in blood and tissues were examined in overdose and non-overdose cases to determine appropriate ranges for interpretation. Twenty-nine literature overdose cases and 8 non-overdose literature cases were compared with this laboratory's findings. The results indicate significant postmortem redistribution of chloroquine. Combining this laboratory's results and the literature results indicates that using a liver concentration of 150 mg/kg as a cutoff between overdose and non-overdose concentrations properly identified 30 of the 34 published cases containing liver chloroquine and 19 of the 20 presented cases.  相似文献   
64.
65.
66.
The recent formation of a United Kingdom and Irish working group, the Body Fluids Forum (BFF), highlighted the need to investigate different working practices prior to any inter-laboratory comparison work and identification of best practice. Various dilutions of semen were seeded onto swabs and cloth samples for each BFF member laboratory to test using their standard techniques. The results showed that the detection of acid phosphatase on swabs is best achieved using direct testing rather than on an extract from the swab. Extraction methods for spermatozoa require a balance to be achieved between using a sufficient volume of water to ensure optimal release and minimal volume to ensure a concentrated extract. PSA tests were investigated and found to be more sensitive than Choline. DNA profiles were obtained from samples in which no spermatozoa had been detected during microscopic examination.  相似文献   
67.
68.
Healthy men, 20 to 60 years old, drank a moderate dose of ethanol in the morning after an overnight fast. They consumed either neat whisky in amounts corresponding to 0.34, 0.51, 0.68, 0.85, or 1.02 g of ethanol per kilogram of body weight or 0.80 g/kg ethanol solvent diluted with orange juice. The peak blood-ethanol concentration (BEC) increased with the dose administered, but the time required to reach the peak was not markedly influenced over the range of doses studied. At a dose of 0.68 g/kg, the peak BEC ranged from 52 to 136 mg/dL (N = 83), and slow absorption (a late-occurring peak) produced a lower peak BEC. The peak BEC was reached between 0 and 45 min for 77% of the subjects (N = 152) and between 0 and 75 min for 97% of them. The time of peaking in venous blood occurred, on average, 10 min later than in capillary (fingertip) blood although the peak BEC was not appreciably different; the mean venous BEC was 97.0 mg/dL (range, 76 to 112 mg/dL), and the mean capillary BEC was 99.6 mg/dL (range, 75 to 123 mg/dL). When subjects drank 0.80 g/kg ethanol diluted with orange juice over 30 min, the average BEC increment between the end of drinking and the peak was 33 mg/dL (range, 0 to 58 mg/dL). The rate of absorption of ethanol was 1.78 mg/dL/min (range, 0.52 to 4.8 mg/dL/min), and the peak BEC occurred within 60 min after the end of drinking in 92% of the trials. The largest BEC increment (mean, 21 mg/dL; range, 0 to 44 mg/dL) was seen during the first 15 min after the drinking period.  相似文献   
69.
When Hurricane Katrina made landfall on the Mississippi Gulf Coast in August 2005, it immediately overwhelmed the abilities of local and state emergency management officials to respond to the ensuing disaster. Although the U.S. Coast Guard and some military units were on scene shortly after the passage of the storm, there seemed to be interminable delays before the military forces began to arrive in numbers to both provide humanitarian relief and secure the affected areas. This article analyzes the response of the National Guard, active-duty military, and Coast Guard forces through the lens of coordination. We find evidence of the successful use of both traditional hierarchical and network-based coordination; we also find support for Donald Kettl's idea of "contingent coordination."  相似文献   
70.
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