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   10862篇
  免费   355篇
各国政治   340篇
工人农民   525篇
世界政治   660篇
外交国际关系   381篇
法律   6872篇
中国共产党   34篇
中国政治   135篇
政治理论   2130篇
综合类   140篇
  2021年   68篇
  2020年   162篇
  2019年   151篇
  2018年   237篇
  2017年   282篇
  2016年   305篇
  2015年   243篇
  2014年   248篇
  2013年   951篇
  2012年   261篇
  2011年   305篇
  2010年   224篇
  2009年   299篇
  2008年   362篇
  2007年   376篇
  2006年   359篇
  2005年   326篇
  2004年   318篇
  2003年   263篇
  2002年   253篇
  2001年   362篇
  2000年   345篇
  1999年   267篇
  1998年   169篇
  1997年   123篇
  1996年   145篇
  1995年   123篇
  1994年   142篇
  1993年   133篇
  1992年   201篇
  1991年   255篇
  1990年   217篇
  1989年   199篇
  1988年   224篇
  1987年   207篇
  1986年   225篇
  1985年   195篇
  1984年   168篇
  1983年   162篇
  1982年   107篇
  1981年   123篇
  1980年   105篇
  1979年   104篇
  1978年   90篇
  1977年   81篇
  1976年   65篇
  1975年   67篇
  1974年   65篇
  1973年   77篇
  1971年   50篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
992.
In July 2005, the Little Rock, Arkansas, school district implemented a new policy to reorganize its management structure in order to create a more efficient bureaucracy. Using Richard Matland’s ambiguity‐conflict model of policy implementation, the authors examine the implementation of this school reorganization policy. Interviews and surveys were conducted with the superintendent and his executive assistants, school principals, teachers, and staff. In line with Matland’s model, the findings suggest that successful implementation is directly related to the policy characteristics of ambiguity and conflict. However, the authors point to the importance of recognizing particular characteristics for different groups of stakeholders within the policy implementation process. Discrepancies among groups of policy actors in the degree of policy ambiguity and policy conflict lead to strikingly different implementation strategies.  相似文献   
993.
Chloroquine concentrations in blood and tissues were examined in overdose and non-overdose cases to determine appropriate ranges for interpretation. Twenty-nine literature overdose cases and 8 non-overdose literature cases were compared with this laboratory's findings. The results indicate significant postmortem redistribution of chloroquine. Combining this laboratory's results and the literature results indicates that using a liver concentration of 150 mg/kg as a cutoff between overdose and non-overdose concentrations properly identified 30 of the 34 published cases containing liver chloroquine and 19 of the 20 presented cases.  相似文献   
994.
A simple and rapid method for the isolation of seven synthetic pyrethroid insecticides (methothrin, fenpropathrin, cyhalothrin, permethrin, cypermethrin, fenvalerate, deltamethrin) with a solid phase extraction (SPE), utilizing Sep-Pak C18 cartridges, from human urine and plasma is presented. The detection of the insecticides was performed using a wide bore capillary gas chromatograph (GC) with flame ionization detection (FID). The insecticide-containing samples mixed with 70% methanol were directly applied to the cartridges and eluted with 2 ml chloroform. The recoveries using the cartridges were between 90-102% for urine and 81-93% for plasma. Mixing samples with 70% methanol prior to extraction, seems very useful for the screening of synthetic pyrethroid insecticides.  相似文献   
995.
A technique is described for the typing of glyoxalase I (GLO I) and the subtyping of phosphoglucomutase-1 (PGM-1) from the root sheath cells of a single forcibly removed hair. This procedure does not require sample preparation and does not alter the morphological characteristics of the hair. The combined discrimination probability (DP) of the two markers taken together is 0.90 for whites and 0.89 for blacks. GLO I can be typed after four weeks, and PGM-1 can be typed after eight to fifteen weeks in hairs maintained at room temperature. Hairs mounted with Permount showed loss of enzyme activity and loss of band sharpness.  相似文献   
996.
Do we know the lethal dose of cocaine?   总被引:1,自引:0,他引:1  
  相似文献   
997.
We examine the degree to which parties act as procedural coalitions in Congress by testing predictions from the party cartel theory (Cox and McCubbins 1993, 1994, 2002). We gain leverage on the question of party influence in Congress by focusing on three types of House members: reelection seekers, higher‐office seekers, and retiring members. We argue that retiring House members are no longer susceptible to party pressure, making them the perfect means (when compared to higher‐office seekers and reelection seekers) to determine the existence of party influence. Results from a pooled, cross‐sectional analysis of the 94th through 105th Congresses (1975–98) suggest that party influence is indeed present in Congress, especially where the party cartel theory predicts: on procedural, rather than final‐passage, votes. Moreover, we find that procedural party influence is almost exclusively the domain of the majority party. This latter finding is especially important because most prior studies have been limited to investigating interparty influence only.  相似文献   
998.
A qualitative study was conducted involving clients, victim advocates, and judges participating in one of Miami‐Dade County's (Florida) “therapeutic” juvenile court based programs, the Dependency Court Intervention Program for Family Violence (DCIPFV). The primary objective of this study was to assess how battered mothers’ perceptions of the dependency court judges’ actions impacted the women's motivation to take appropriate actions to promote their own, and their child(ren)'s safety.  相似文献   
999.
1000.
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