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   7137篇
  免费   478篇
各国政治   339篇
工人农民   222篇
世界政治   469篇
外交国际关系   233篇
法律   5030篇
中国政治   34篇
政治理论   1253篇
综合类   35篇
  2020年   157篇
  2019年   166篇
  2018年   176篇
  2017年   209篇
  2016年   212篇
  2015年   197篇
  2014年   182篇
  2013年   746篇
  2012年   153篇
  2011年   169篇
  2010年   208篇
  2009年   223篇
  2008年   163篇
  2007年   159篇
  2006年   167篇
  2005年   159篇
  2004年   177篇
  2003年   158篇
  2002年   139篇
  2001年   310篇
  2000年   252篇
  1999年   225篇
  1998年   97篇
  1997年   64篇
  1996年   69篇
  1995年   79篇
  1994年   87篇
  1993年   87篇
  1992年   151篇
  1991年   157篇
  1990年   145篇
  1989年   156篇
  1988年   122篇
  1987年   137篇
  1986年   124篇
  1985年   132篇
  1984年   106篇
  1983年   116篇
  1982年   82篇
  1981年   78篇
  1980年   55篇
  1979年   108篇
  1978年   70篇
  1977年   58篇
  1976年   50篇
  1975年   47篇
  1974年   56篇
  1973年   56篇
  1972年   44篇
  1968年   40篇
排序方式: 共有7615条查询结果,搜索用时 15 毫秒
941.
942.
Controlled and uncontrolled fluid intake studies were conducted on series of volunteers over the 6 or 12 h of the study periods. Urine specimens were obtained from each subject randomly or at specified times relative to fluid ingestion. Creatinine analysis performed by a modification of the Abbott TDx procedure demonstrates that the values obtained from single collection specimens fall almost in the same range as the values from 24 h pooled collection specimens. The creatinine concentration can be used to indicate possible adulteration of urine specimens by dilution as a means of avoiding detection of use of drugs of abuse. Between 4 and 7 h are required for a decrease in creatinine concentration to about 100 mg/dL from an initial mean of about 170 mg/dL. A minimum of 6 h is needed for any creatinine value to fall to 50 mg/dL or less. Thus, it appears that creatinine output is sensitive to the amount of fluid ingested, but the relationship is neither linear nor immediate. The absence of a significant creatinine concentration in a specimen can be used as an indication of direct or indirect adulteration of the urine specimen by dilution or replacement with water. At NDSL-Great Lakes, a decline of the creatinine concentration to 30 mg/dL is used as a cutoff for differentiating between urine specimens that might have been tampered with to avoid detection of drug use and those specimens that are dilute for other reasons. Values at 10 mg/dL or less are suggestive of replacement by water. The information is provided to local commands for investigation prior to initiation of punitive action by the command.  相似文献   
943.
Abstract This article presents the findings of an analysis of victim offender mediation programs working with the juvenile courts in Albuquerque (NM), Minneapolis (MN) and Oakland (CA). The study is based upon 868 interviews with crime victims and offenders, including pre- and post-mediation interviews and two different comparison groups. The data that emerged from this study indicates that the vast majority of both victims and young offenders experience the mediation process and outcome (restitution agreement) as fair and are satisfied with the program. The mediation process used by the programs in Albuquerque, Minneapolis and Oakland results in greater satisfaction, greater perception of fairness and higher restitution completion rates than found in a matched sample of victims and offenders who were not referred to mediation.  相似文献   
944.
945.
946.
Results-based management (RBM) is well entrenched as a management tool for international development practice. Yet after a decade of its use, many development practitioners view RBM in a negative light, considering it to be a donor requirement that diverts time, energy, and resources away from actually doing development work. This article provides some broad reflections on RBM from a distinctive vantage point: the perspective of the project (or programme) evaluator. The article reflects on challenges associated with RBM and draws from these reflections a number of suggested strategies to improve its use. It concludes that development practitioners need to be more aggressive in implementing RBM.  相似文献   
947.
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   
948.
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   
949.
950.
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