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   7155篇
  免费   201篇
各国政治   235篇
工人农民   244篇
世界政治   480篇
外交国际关系   214篇
法律   4885篇
中国政治   47篇
政治理论   1214篇
综合类   37篇
  2020年   92篇
  2019年   112篇
  2018年   130篇
  2017年   159篇
  2016年   162篇
  2015年   109篇
  2014年   157篇
  2013年   641篇
  2012年   169篇
  2011年   186篇
  2010年   159篇
  2009年   156篇
  2008年   187篇
  2007年   214篇
  2006年   222篇
  2005年   180篇
  2004年   186篇
  2003年   202篇
  2002年   164篇
  2001年   314篇
  2000年   291篇
  1999年   220篇
  1998年   85篇
  1997年   69篇
  1996年   75篇
  1995年   68篇
  1994年   76篇
  1993年   61篇
  1992年   141篇
  1991年   153篇
  1990年   136篇
  1989年   155篇
  1988年   134篇
  1987年   149篇
  1986年   134篇
  1985年   152篇
  1984年   118篇
  1983年   139篇
  1982年   93篇
  1981年   93篇
  1980年   69篇
  1979年   99篇
  1978年   74篇
  1977年   66篇
  1976年   57篇
  1975年   46篇
  1974年   57篇
  1973年   59篇
  1971年   50篇
  1970年   46篇
排序方式: 共有7356条查询结果,搜索用时 0 毫秒
221.
Are party switchers successful at furthering their careers? Most research on party switching focuses on the decision to switch and with which party to affiliate. Less attention is paid to the costs and benefits of switching parties. Moreover, previous research examining the electoral success of party switchers has often ignored how costs vary between the candidate selection process and the general election. This study addresses this gap in the literature by using original data on the careers of Mexican federal deputies to examine the costs and benefits of switching parties at the candidate selection stage and during general elections. The results suggest that party switchers are more successful at winning ballot access than nonswitchers but are less likely to win office. These results help explain why ambitious politicians would switch parties, given the known risks of changing party affiliation.  相似文献   
222.
Although parental compliance with court orders in child welfare cases is key to achieving physical parent‐child reunification and successful case closure, little research has examined how parent‐child relationship‐focused rehabilitative services uniquely influence case outcomes. This project fills this gap by investigating links between court ordering of and parental participation in Child‐Parent Psychotherapy (CPP) with court outcomes. Data were obtained from court records of 448 court‐involved parents. Hierarchical regressions revealed that greater participation in CPP led to reunification and successful case closure but not faster case closure. Courtroom professionals should consider parent‐child relationship‐based therapies as tools for achieving child welfare goals.  相似文献   
223.
224.
Chioqueta AP  Stiles TC 《危机》2007,28(2):67-73
In this study we examined the role of psychological buffers (life satisfaction, self-esteem, perception of family cohesion, and perception of social support) in the development of hopelessness and suicidal ideation. The participants were 314 university students, 71 males and 243 females, who were asked to complete a battery of instruments measuring the psychological buffers mentioned above. The results of a set of hierarchical multiple regression analyses suggested that life satisfaction and self-esteem are independent predictors of lower levels of hopelessness, while perception of social support seems to be the major predictor of lower levels of suicidal ideation independent of depression and hopelessness severity. Thus, hopelessness seems to be minimized by the level of life satisfaction and level of self-esteem exhibited by the individuals, while the key factor to the mitigation of suicidal ideas seems to be perception of social support.  相似文献   
225.
Solow’s Growth Model Solow (Q J Econ 70:65–94, 1956) and aggregate data are applied to estimates the increase in productivity due international trade and the resulting technical change and capital augmentation for the years 1970 to 1978 and 1978 (the beginning of the reforms and “open door” policy in China) to 1993. According this paper’s estimations the GDP per man hour in 1978 increased by 1.76 times for the year 1970, from $0.1233 in 1970 to $0.2169 in 1978, and in 1993 by 5.23 time that of 1978 to $1.1348 in 1993. For the period under study due to “open door” policy the GDP per man-hour more than quadrupled, and 76.18% of this increase was due to technical changes and the remaining 23.82 was due to capital augmentation. The paper consists of five sections. “Introduction” Section reviews some of the growth literature as well as looking at the macroeconomic measures of China’s economic performance since 1978 the beginning of the reforms. “Data” Section explains the data modifications. “Empirical results” Section portrays the empirical results and the next indicates conclusions. This paper is dedicated to the memories of Late Dr. Anthony D’Amato, who was a Professor at W. Paul Stillman School of Business at Seton Hall University South Orange, New Jersey.
Hamideh P. RamjerdiEmail:
  相似文献   
226.
International Journal for the Semiotics of Law - Revue internationale de Sémiotique juridique - The article deals with the problem of coining terms and nomenclature signs with proper names...  相似文献   
227.
228.
Postmortem computed tomography (PMCT) is integrated into the evaluation of decedents in several American medical examiner offices and medicolegal death investigative centers in many other countries. We retrospectively investigated the value of PMCT in a series of firearm homicide cases from a statewide centralized medical examiner’s office that occurred during 2016. Autopsies were performed or supervised by board-certified forensic pathologists who reviewed the PMCT scans prior to autopsy. PMCT scans were re-evaluated by a forensic radiologist blinded to the autopsy findings and scored by body region (head–neck, thoracoabdominal, and extremities). Injury discrepancies were scored using a modified Goldman classification and analyzed with McNemar’s test. We included 60 males and 20 females (median age 31 years, range 3–73). Based on PMCT, 56 (79.1%) cases had injuries relevant to the cause of death in a single body region (24 head–neck region, 32 thoracoabdominal region). Out of these 56 cases, 9 had a missed major diagnosis by PMCT outside that region, including 6 extremity injuries visible during standard external examination. Yet all had evident lethal firearm injury. We showed that PMCT identifies major firearm injuries in homicide victims and excludes injuries related to the cause of death in other regions when a single body region is injured. Although PMCT has a known limited sensitivity for soft tissue and vascular pathology, it can be combined with external examination to potentially reduce or focus dissections in some of these cases depending on the circumstances and medicolegal needs.  相似文献   
229.
230.
Recent increases in deaths in the United States from synthetic opioids such as fentanyl and fentanyl analogues (fentanyls) have raised concerns about possible occupational exposures to these potent agents. Medicolegal death investigators and autopsy suite staff might perform job tasks involving exposure to fentanyls. The potential for exposure to fentanyls among medicolegal death investigators and autopsy technicians at a state medical examiner's office was evaluated through review of caseload characteristics, injury and illness logs, and procedures and policies and discussions with management and employee representatives. The evaluation showed that this medical examiner's office had low potential for work-related exposure to fentanyls; its standard operating procedures and personal protective equipment requirements should reduce the potential for occupational exposure. Medicolegal death investigation agencies can develop and implement guidance to control exposures and provide workforce education and training to reduce the potential for work-related exposure to fentanyls.  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