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   12380篇
  免费   422篇
各国政治   794篇
工人农民   489篇
世界政治   1003篇
外交国际关系   685篇
法律   6704篇
中国政治   88篇
政治理论   2932篇
综合类   107篇
  2021年   69篇
  2020年   154篇
  2019年   200篇
  2018年   310篇
  2017年   337篇
  2016年   393篇
  2015年   242篇
  2014年   289篇
  2013年   1617篇
  2012年   321篇
  2011年   323篇
  2010年   292篇
  2009年   300篇
  2008年   376篇
  2007年   420篇
  2006年   396篇
  2005年   337篇
  2004年   333篇
  2003年   318篇
  2002年   288篇
  2001年   374篇
  2000年   328篇
  1999年   329篇
  1998年   175篇
  1997年   164篇
  1996年   141篇
  1995年   129篇
  1994年   141篇
  1993年   143篇
  1992年   187篇
  1991年   218篇
  1990年   213篇
  1989年   192篇
  1988年   208篇
  1987年   203篇
  1986年   206篇
  1985年   184篇
  1984年   168篇
  1983年   147篇
  1982年   108篇
  1981年   120篇
  1980年   86篇
  1979年   145篇
  1978年   104篇
  1977年   89篇
  1976年   70篇
  1975年   94篇
  1974年   109篇
  1973年   91篇
  1971年   62篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
41.
Michael Levin 《欧亚研究》1997,49(8):1519-1525
James D. White, Karl Marx and the Intellectual Origins of Dialectical Materialism. Basingstoke: Macmillan, 1996, xii + 416 pp., £40.00 h/b, £14.99 p/b.  相似文献   
42.
43.
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   
44.
45.
Attributions of blame for the first and latest episodes of violence were assessed in a sample of 139 couples who were referred to a mandatory domestic violence treatment program in the military. Use of a methodology which allows for reports of nonmutually exclusive categories of attribution from both members of the dyad revealed more complex patterns of attributions than reflected in the existing literature. In addition, there were low rates of agreement within couples as to who was to blame for the violence. Although both men and women exhibited a high frequency of blaming their partner for both episodes of violence, men were significantly more likely to blame themselves for the latest than for the first episode. Attributions of blame were related to contextual variables in both men and women. Sex specific relationships emerged. These results were discussed with specific reference to predictions derived from attribution theory and their clinical implications.  相似文献   
46.
A minisatellite probe, MZ 1.3, detecting hypervariable fragment patterns was isolated from a human genomic library. A repetitive sequence of 27 bp length was identified which is contained in the probe approx. 40 times. The MZ 1.3 repeat shows variable homology of 53-73% to the repetitive sequence of the protein III gene of the bacteriophage M13 genome. Polymorphic restriction fragment patterns were found with MZ 1.3 using the enzymes Hinf I, BstN I, Hae III, Mbo I, PstI/Pvu II, and Rsa I. An average of 18 polymorphic fragments was observed using Hinf I as enzyme. The band sharing frequency after Hinf I digestion among unrelated individuals was determined to be 23.8 +/- 7.2%. An example for the application of MZ 1.3 to paternity testing in an incest case is given. The probe can be used with radioactive or non-radioactive detection systems. An approach is presented to compare polymorphic fragment patterns from individuals obtained by independent gel runs on the basis of relative band positions (RBP) and calculated in a computerized analysis.  相似文献   
47.
48.
49.
50.
Comparison of a suspected biter's dental arches with the patterned injury of a bite mark is especially difficult when the bite occurs in an anatomic location with a small radius of curvature or with complex or compound curves. The authors present two case reports in which human skin was used as a template for the reproduction of a bite. In one case the victim's skin was used; in the other, the skin of a anatomically similar person was used. The use of inked dental casts, photography, and transparent overlays significantly reduced the errors common to analysis of bite marks in these highly curved areas.  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