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   31062篇
  免费   974篇
  国内免费   5篇
各国政治   1340篇
工人农民   1273篇
世界政治   2391篇
外交国际关系   1101篇
法律   18966篇
中国共产党   8篇
中国政治   221篇
政治理论   6413篇
综合类   328篇
  2020年   411篇
  2019年   487篇
  2018年   612篇
  2017年   729篇
  2016年   751篇
  2015年   536篇
  2014年   591篇
  2013年   3023篇
  2012年   792篇
  2011年   829篇
  2010年   675篇
  2009年   734篇
  2008年   851篇
  2007年   927篇
  2006年   885篇
  2005年   787篇
  2004年   799篇
  2003年   856篇
  2002年   745篇
  2001年   1193篇
  2000年   1057篇
  1999年   889篇
  1998年   508篇
  1997年   394篇
  1996年   380篇
  1995年   349篇
  1994年   434篇
  1993年   392篇
  1992年   591篇
  1991年   652篇
  1990年   605篇
  1989年   572篇
  1988年   590篇
  1987年   561篇
  1986年   599篇
  1985年   560篇
  1984年   475篇
  1983年   507篇
  1982年   406篇
  1981年   392篇
  1980年   286篇
  1979年   400篇
  1978年   279篇
  1977年   236篇
  1976年   207篇
  1975年   233篇
  1974年   257篇
  1973年   210篇
  1972年   200篇
  1971年   175篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
12.
Numerous accounts reveal that congressional leaders often secure “hip‐pocket votes” or “if you need me” pledges from rank‐and‐file legislators. These are essentially options on votes. Leaders exercise sufficient options—pay legislators to convert to favorable votes—when those options will yield victory. Otherwise, they release the options. A model shows that this optimal strategy for leaders produces many small victories, few small losses, and losses that are, on average, larger than victories. We find precisely these patterns, hence strong evidence for vote options, in Congressional Quarterly key votes from 1975 through 2001 and in non‐key votes from the 106th Congress (1999–2000).  相似文献   
13.
The adjustment problems associated with sexual abuse, physical abuse, psychological maltreatment, neglect, and witnessing family violence during childhood were examined in three studies. Study 1 demonstrated significant overlap between maltreatment types in parent reports (N = 50) of maltreatment experiences of their child aged 5–12 years. Parental sexual punitiveness, traditionality, family adaptability and family cohesion significantly predicted scores on 4 maltreatment scales and children's externalizing behavior problems. Level of maltreatment predicted internalizing, externalizing, and sexual behavior problems. In Study 2, significant overlap was found between adults' retrospective reports (N = 138) of all 5 types of maltreating behaviors. Parental sexual punitiveness, traditionality, family adaptability, and family cohesion during childhood predicted the level of maltreatment and current psychopathology. Although child maltreatment scores predicted psychopathology, childhood family variables were better predictors of adjustment. Study 3 demonstrated that child maltreatment scores predicted positive aspects of adult adaptive functioning (N = 95).  相似文献   
14.
15.
16.
17.
18.
In the last 50 years Chinese arbitration law and practices has made significant contributions to the international commercial arbitration and strides to manage the rapidly increasing caseload associated with a period of amazing growth in economic interactions between Chinese and non-Chinese parties. In the global economy there are rooms for further improvement. The paper proposed some ideas on reforming the Chinese arbitration law and practices on the arbitration system regarding the ad hoc arbitration, panel system and tribunal jurisdiction, interim measures of protection, as well as standards for the judicial review on the arbitral awards.  相似文献   
19.
This study aimed to expand the scope of previous research by assessing the effectiveness of soot-removal techniques on glass from petrol-bomb debris using methods of 1% and 2% sodium hydroxide (NaOH) solutions, ultrasonic bath and vacuum suction. Of particular interest were the 1% and 2% NaOH solutions applied to the soot-covered surfaces. Petrol bombs containing petrol or a 50:50 mix of petrol and motor oil were exploded and the debris was collected for analysis. Favourable results were found to varying degrees using each of the soot-removal methods with the 1% and 2% NaOH wash solutions, being the most useful. The 2% NaOH solution also proved successful as a soak to loosen and remove heavy contamination of soot and accelerants without damaging the finger mark beneath. This study also found that recovery of finger marks in blood from beneath soot using the 2% NaOH solution was possible. Finger marks were also applied to glass bottles with plastic adhesive labels, and providing the fire damage is not too great marks were also retrievable. Results from this study lead to the conclusion that the NaOH wash solution is ideally suited for soot removal to reveal latent and blood-contaminated marks both within the laboratory and at crime scenes.  相似文献   
20.
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