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   7238篇
  免费   481篇
各国政治   343篇
工人农民   223篇
世界政治   475篇
外交国际关系   250篇
法律   5039篇
中国政治   34篇
政治理论   1318篇
综合类   37篇
  2020年   157篇
  2019年   169篇
  2018年   185篇
  2017年   213篇
  2016年   217篇
  2015年   200篇
  2014年   183篇
  2013年   762篇
  2012年   158篇
  2011年   169篇
  2010年   207篇
  2009年   224篇
  2008年   167篇
  2007年   162篇
  2006年   169篇
  2005年   162篇
  2004年   179篇
  2003年   160篇
  2002年   144篇
  2001年   309篇
  2000年   255篇
  1999年   229篇
  1998年   101篇
  1997年   67篇
  1996年   73篇
  1995年   79篇
  1994年   88篇
  1993年   90篇
  1992年   151篇
  1991年   156篇
  1990年   149篇
  1989年   157篇
  1988年   125篇
  1987年   138篇
  1986年   125篇
  1985年   133篇
  1984年   102篇
  1983年   117篇
  1982年   83篇
  1981年   79篇
  1980年   55篇
  1979年   109篇
  1978年   69篇
  1977年   58篇
  1976年   52篇
  1975年   48篇
  1974年   56篇
  1973年   57篇
  1972年   46篇
  1968年   40篇
排序方式: 共有7719条查询结果,搜索用时 15 毫秒
961.
962.
963.
尽管国内政局动荡以及国外风云突变,印尼的通货膨胀问题仍得到遏制,利率正在下降,货币稳定.经济增长保持适中的速度,2004年上半年GDP增长了4.7%,主要是由于个人消费拉动GDP的增长,占增长总数的2/3.同时,由于竞选期延长,持续的不稳定因素使投资活动受到影响.虽然投资是GDP增长的第二大因素(占1/3左右),但印尼的投资形势仍不见有多大起色:投资额与GDP之比仍不够乐观,增长仅为18%,远远低于亚洲金融危机前的30%.  相似文献   
964.
A total of 29 court-referred individuals charged with arson were psychiatrically studied. From this pre-trial cohort from a large heterogeneous urban population base, a higher rate of psychosis was found than in other recent studies. However, consistent with these studies was the rarity of the diagnosis of pyromania. An important finding of this study was the substantial number of fires set by individuals who are homeless mentally disordered or substance abusing, or both.  相似文献   
965.
966.
967.
The different statements concerning the slope and intercept of the regression line and the 95% limits of confidence are the reason that potassium in vitreous humor is not used (at least in Germany) as an aid in estimating the time of death. The relationship between the concentration of potassium and the time of death is mainly influenced by antemortem electrolyte imbalances caused by disease and/or duration of terminal episode. The influence of terminal episode is best identified by its duration (Adelson et al., J. Forensic Sci., 8 (1963) 503–514). In order to have a method suitable for every case and to be as precise as possible we looked therefore for parameters in vitreous humor which were stable postmortem and indicating antemortem electrolyte imbalance. Urea is such a parameter, being stable postmortem (Coe, Am. J. Clin. Pathol., 51 (1969) 741–750) and useful as a marker of antemortem electrolyte imbalance. Our investigations on potassium in vitreous humor, including sudden and hospital deaths after chronic lingering disease, revealed 95% limits of confidence of ±34 h up to 120 h postmortem. Reviewing only cases with urea less than 100 mg/dl the 95% limits of confidence could be reduced to ±22 h. Considering the duration of terminal episode (<6 h) the precision was ±20 h. In this way our modified procedure is suitable for every case with the resulting precision of estimation being determined only by the duration of the terminal episode and urea concentration.  相似文献   
968.
969.
The unlabeled antibody (PAP) immunoperoxidase technique was applied to the ABO blood grouping of human scalp hairs. Hair samples were subjected to longitudinal- or cross-sectioning, thus obtaining suitable samples for subsequent immunostaining. The immunostaining was carried out using rabbit anti-A and anti-B sera as the primary antibodies. With this technique, the group-specific staining which is revealed as a dark brown precipitate was clearly observed within the medullae of the hair shaft, and depending on the presence or absence of these precipitates, respective blood groups of unknown hair samples were determined. At the hair root, on the other hand, positive stainings were observed not only in medullary cells but also in some cortical cells of the keratogenous zone. From the present study, it can be safely said that this technique is of practical use for the ABO blood grouping from a minute (less than 3 mm) hair sample.  相似文献   
970.
A case is presented where phentermine, a sympathomimetic amine used as an anorectic drug, is believed to have significantly contributed to the death of an individual in whom other drugs were also found. Blood, urine, and tissue concentrations of phentermine are reported and compared to other cases in the literature.  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