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   10664篇
  免费   569篇
各国政治   459篇
工人农民   334篇
世界政治   692篇
外交国际关系   364篇
法律   7403篇
中国共产党   17篇
中国政治   79篇
政治理论   1818篇
综合类   67篇
  2020年   206篇
  2019年   212篇
  2018年   247篇
  2017年   293篇
  2016年   281篇
  2015年   259篇
  2014年   246篇
  2013年   1001篇
  2012年   230篇
  2011年   271篇
  2010年   279篇
  2009年   301篇
  2008年   262篇
  2007年   238篇
  2006年   269篇
  2005年   260篇
  2004年   277篇
  2003年   253篇
  2002年   230篇
  2001年   477篇
  2000年   365篇
  1999年   316篇
  1998年   132篇
  1997年   110篇
  1996年   103篇
  1995年   127篇
  1994年   127篇
  1993年   139篇
  1992年   229篇
  1991年   235篇
  1990年   219篇
  1989年   215篇
  1988年   200篇
  1987年   215篇
  1986年   218篇
  1985年   234篇
  1984年   183篇
  1983年   190篇
  1982年   116篇
  1981年   112篇
  1980年   75篇
  1979年   140篇
  1978年   99篇
  1977年   80篇
  1976年   67篇
  1975年   74篇
  1974年   94篇
  1973年   78篇
  1972年   70篇
  1968年   67篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
991.
992.
We present strong evidence that governing coalitions in Italy exercise significant negative agenda powers. First, governing parties have a roll rate that is nearly 0, and their roll rate is lower than opposition parties' roll rates, which average about 20% on all final‐passage votes. Second, after one controls for distance from the floor median, opposition parties have higher roll rates than government parties. These results strongly suggest that governing parties in Italy are able to control the legislative agenda to their benefit. We also document significantly higher opposition roll rates on decree‐conversion bills and budget bills than on ordinary bills—results consistent with our theoretical analysis of the differing procedures used in each case.  相似文献   
993.
Book Reviews     
Book Reviews in This Article:
America's Health Care Revolution. Who Lives? Who Dies? Who Pays? By Joseph A. Califano, Jr.
American Medicine: The Power Shift . By Eli Ginzberg
Health Services in the United States, 2d ed. By Florence A. Wilson and Duncan Neuhauser
The U.S. Health Care System. A Look to the 19905 . Edited by Eli Ginzberg.
Handbook of Health Care Risk Management . By Glenn T. Troyer and Steven L. Salman
Health Care Risk Management: Organization and Claims Administration . By Gary P. Kraus
Medicolegal Aspects of Critical Care . Edited by Katherine Benesch, Norman S. Abramson, Ake Grenvik, and Alan Meisel
Ethics and Critical Care Medicine . Edited by John C. MosLop and Loretta Kopelnian
The mentally disabled and the Law , 3d ed. By Samuel Jan Brakel, John Parry, and Barbaa A.  相似文献   
994.
995.
Based on Satow's own account of the conference in his diaries, this article examines the role played by Sir Ernest Satow as the second plenipotentiary on the British delegation at the Second Hague Peace Conference in 1907. His previous experience at the post-Boxer conference at Peking in 1900-1901 stood Satow in good stead during the preparations for the conference as well as once the actual negotiations commenced. His main contribution to the proceedings at The Hague, however, was the preparatory work for the London Naval Conference of 1909. Satow's stance towards the negotiations of 1907 marks him out as a predecessor of twentieth-century internationalists.  相似文献   
996.
Western policymakers have come to take Egypt's foreign policy orientation for granted in recent decades. After President Anwar Sadat's dramatic split from the Soviet bloc and embrace of peace with Israel in the 1970s, Egypt became a reliable but rarely exciting diplomatic partner. Little appreciated has been the centrality of foreign policy to Egypt's internal interests as well as its external ones, and the extent to which changes in either the domestic or international environment could trigger the Egyptians to reassess their stance. The present article examines the interests that Egyptian foreign policy serves, and it analyses factors that could prompt a future Egyptian government to adopt different policies in order to serve those interests more effectively.  相似文献   
997.
Research into community corrections officers’ perceptions of the needs of ex-offenders has largely been overlooked. While some empirical research has emerged regarding federal parole officers’ perceptions, it is conceptually incomplete. A gap in the literature remains regarding the concordance or discordance between offenders and community corrections officers’ perceptions of offender needs and the opportunities for success upon release. Using a sample of community corrections officers in Seattle, Washington, this research examined officer perception of ex-offender needs, the value officers’ placed on the specific needs, and the opportunities available for offenders to meet their needs. Differences between officers emerged including the finding that female officers rated needs and challenges for offenders significantly different than male officers. Policy implications of the research are discussed. This research was made possible due to a grant award from the College of Arts and Sciences at Seattle University. This research was first presented at the 2005 Academy of Criminal Justice Sciences Conference in Chicago. We are grateful to Mac Pevey and Keven Bovenkamp from the Washington State Department of Corrections and Bill Corn and Tim McTighe from United States Probation and Pretrial Services for their support, assistance, and for making the study possible. A special thanks to our research assistant Tania Reyes who was instrumental in collecting the data for this investigation.  相似文献   
998.
This investigation examines the possibility of interaction between tranylcypromine and butorphanol in comparison to pethidine. The LD50 of pethidine and butorphanol were determined in mice pretreated with the non-selective monoamine oxidase (MAO) inhibitor, tranylcypromine orally for 8 days or with oral saline solution. Tranylcypromine decreased the LD50 of both pethidine and butorphanol by 78% and 41%, respectively. Anesthetized rabbits with halothane pretreated with tranylcypromine or saline were given pethidine (5 mg/kg i.v.) or butorphanol (0.5, 1 and 2 mg/kg i.v.). Pethidine produced a marked increase in blood pressure in rabbits pretreated with tranylcypromine and did not affect significantly the heart rate. Butorphanol did not affect either blood pressure or heart rate at doses of 0.5 or 1 mg/kg. However, the largest dose of butorphanol (2 mg/kg) produced hypotension and tachycardia in rabbits pretreated with tranylcypromine. Neither pethidine nor butorphanol affected the temperature of anesthetized rabbits pretreated with tranylcypromine or saline.  相似文献   
999.
In the wake of the Supreme Court's decision in Aviall—that potentially responsible parties (PRPs) are not permitted to seek contribution from other PRPs under CERCLA unless they have been sued or otherwise settled their CERCLA liability—PRPs and the courts have struggled to identify a remedy for those that voluntarily undertake cleanup of contaminated sites. The Atlantic Research decision resolves a conflict among the circuits and clarifies that PRPs voluntarily incurring cleanup costs pursuant to CERCLA, can maintain an action for cost recovery against other PRPs. The authors discuss the current legal landscape regarding actions for cost recovery as presented in Atlantic Research.  相似文献   
1000.
Abstract: The Quantifiler® Duo DNA Quantification kit enables simultaneous quantification of human DNA and human male DNA as well as detection of inhibitors of PCR in a single real-time PCR well. Pooled human male genomic DNA is used to generate standard curves for both human (ribonuclease P RNA component H1) and human male (sex determining region Y) specific targets. A shift in the cycle threshold (CT) values for the internal positive control monitors the presence of PCR inhibitors in a sample. The assay is human specific and exhibits a high dynamic range from 0.023 to 50 ng/μL. In addition, the multiplex assay can detect as little as 25 pg/μL of human male DNA in the presence of a 1000-fold excess of human female DNA. The multiplex assay provides assessment of the DNA extract and guidance for the selection of the appropriate AmpFℓSTR® Amplification Kit to obtain interpretable short tandem repeat profiles.  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