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   9050篇
  免费   344篇
各国政治   406篇
工人农民   329篇
世界政治   757篇
外交国际关系   416篇
法律   5020篇
中国政治   43篇
政治理论   2361篇
综合类   62篇
  2023年   52篇
  2021年   48篇
  2020年   111篇
  2019年   139篇
  2018年   203篇
  2017年   214篇
  2016年   265篇
  2015年   162篇
  2014年   172篇
  2013年   1091篇
  2012年   235篇
  2011年   237篇
  2010年   214篇
  2009年   255篇
  2008年   238篇
  2007年   259篇
  2006年   258篇
  2005年   212篇
  2004年   218篇
  2003年   224篇
  2002年   211篇
  2001年   287篇
  2000年   295篇
  1999年   231篇
  1998年   161篇
  1997年   137篇
  1996年   99篇
  1995年   128篇
  1994年   126篇
  1993年   121篇
  1992年   193篇
  1991年   164篇
  1990年   189篇
  1989年   189篇
  1988年   199篇
  1987年   200篇
  1986年   162篇
  1985年   180篇
  1984年   142篇
  1983年   122篇
  1982年   107篇
  1981年   103篇
  1980年   78篇
  1979年   94篇
  1978年   72篇
  1977年   57篇
  1976年   57篇
  1975年   49篇
  1974年   61篇
  1973年   50篇
排序方式: 共有9394条查询结果,搜索用时 15 毫秒
31.
32.
What Do Prosecutors Maximize? Evidence from the Careers of U.S. Attorneys   总被引:1,自引:0,他引:1  
This study examines the performance of chief federal prosecutors(U.S. attorneys) and their subsequent careers. In a sample of570 attorneys in office from 1969 to 2000, the length of prisonsentences is positively related to subsequent favorable careeroutcomes for U.S. attorneys. In contrast, conviction rates donot appear to affect the careers of U.S. attorneys. These resultsare consistent with longer total prison sentences’ beingpersonally beneficial to prosecutors, and prosecutors’maximizing the length of prison sentences. Overall, the resultssuggest that sentence length, as opposed to convictions rates,is the relevant performance metric.  相似文献   
33.
34.
Blood previously acidified with aqueous saturated ammonium chloride solution was extracted with ethyl acetate. The dried extract was subjected to acetonitrile–hexane partition. The acetonitrile portion was analysed for the presence of acidic and neutral drugs by HPLC–DAD (200 mm×2.1 mm I.D. microbore ODS-Hypersil column) and GC–FID (25 m narrow-bore×0.25 mm I.D. HP-5 column with 0.33 μm film thickness). The protocol was found to be suitable for both clinical toxicology (including emergency toxicology) and postmortem toxicology. At least 66 drugs of interest were unequivocally identified by RRTs (HPLC) and UV spectra (DAD) match while another 12 were unequivocally identified by double RRTs match (HPLC and GC). Quantitation was facilitated by incorporating calibration blood standards in each assay batch. The five drugs most commonly encountered in clinical blood specimens (1150 cases) were: paracetamol (47.4% of the cases); chlormezanone (6.6%), theophylline (1.74%), naproxen (1.65%) and mefenamic acid (1.56%). The following drugs were detected in toxicologically significant quantities in postmortem blood specimens (245 cases): phenobarbitone (1.22% of the cases), naproxen (0.82%), chlormezanone (0.82%), theophylline (0.82%), carbamazepine (0.41%) and paracetamol (0.41%).  相似文献   
35.
36.
This article examines the effect upon damages for personal injury of methods used in the United States of America to calculate loss of future earnings. The work of lawyers is examined from the perspective of labour economists. The damages calculated by using these alternative methods are compared with those actually awarded in over a hundred cases determined by courts in England and Wales. This interdisciplinary and comparative study reveals that the tort system fails to satisfy one of its main objectives in that it does not provide recipients of damages with 'full' compensation.  相似文献   
37.
The enzyme activity of phosphoglucomutase (PGM) has been investigated in red cell haemolysates from 142 individuals and compared to the sub-type as determined by isoelectric focusing. The 10 phenotypes showed significant differences in PGM-activity which indicates that there is a correlation between the level of activity and the isolelectric point of homozygotes. No indication of silent alleles or alleles with reduced activity was found in this collective.  相似文献   
38.
The Green River Murder Investigation in King County, Washington, is currently the longest active serial murder investigation in U.S. history. During its course, over 26 separate scenes with from one to five victims each have been processed. The experience of the authors is presented in order to acquaint other agencies with techniques of outdoor scene processing that have evolved during recovery of remains from Green River and other skeletal cases.  相似文献   
39.
40.
Recent major shifts in US military thinking, creating a new low-intensity conflict (LIC) doctrine, have resulted already in significant changes in organization, mission definition, force structure and budgetary allocation. These changes have come about because American leadership recognizes that the process of deindustrialization has produced a vulnerable, highly integrated and interdependent global economic system. This system of economic rationalization is susceptible to anti-western disruptions because of the instability produced by rapid social change, a consequence of the competition from the newly industrialized nations. LIC capability is viewed as a necessary means for dealing with disruptions.  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