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   1083篇
  免费   71篇
各国政治   55篇
工人农民   40篇
世界政治   107篇
外交国际关系   130篇
法律   474篇
中国政治   4篇
政治理论   335篇
综合类   9篇
  2023年   10篇
  2021年   6篇
  2020年   28篇
  2019年   35篇
  2018年   35篇
  2017年   54篇
  2016年   62篇
  2015年   38篇
  2014年   40篇
  2013年   153篇
  2012年   35篇
  2011年   54篇
  2010年   38篇
  2009年   40篇
  2008年   39篇
  2007年   27篇
  2006年   35篇
  2005年   42篇
  2004年   43篇
  2003年   40篇
  2002年   28篇
  2001年   17篇
  2000年   27篇
  1999年   19篇
  1998年   17篇
  1997年   15篇
  1996年   10篇
  1995年   9篇
  1994年   7篇
  1993年   16篇
  1992年   8篇
  1991年   15篇
  1990年   14篇
  1989年   10篇
  1988年   6篇
  1987年   9篇
  1986年   3篇
  1985年   11篇
  1984年   5篇
  1983年   7篇
  1982年   6篇
  1981年   5篇
  1980年   5篇
  1979年   3篇
  1978年   4篇
  1977年   4篇
  1975年   5篇
  1974年   4篇
  1972年   3篇
  1970年   2篇
排序方式: 共有1154条查询结果,搜索用时 203 毫秒
991.
992.
993.
Throughout the 1920s, distrust and contention marked Anglo–Soviet relations, culminating in the diplomatic break in 1927. In 1929, the incoming Labour government successfully pursued its objective of re-establishing diplomatic relations with Moscow, but the follow-up in terms of ambassadorial appointments was far from routine for either side. This analysis shows that internal pressures complicated decisions about whether to appoint career diplomats or choose political figures. Resisting both claims from enthusiastically hopeful Labour backbenchers and criticisms from the left wing media, the British foreign secretary, Arthur Henderson, chose a Russian-speaking career diplomat. On the Soviet side, the first choice was a controversial politician, but then replaced by a financial expert, albeit one tainted as a defeated political opponent of Josef Stalin. Whilst both ambassadors could be considered “professionals,” neither was able to have a deep impact on the relationship, which remained troubled.  相似文献   
994.
Hydrophilic polymers are used to coat catheters and other intravascular devices. In general, these polymers have many salutary properties; however, in some instances, fragmentation of hydrophilic polymers coating intravascular devices can occur with fatal consequences. This report details the histopathologic changes in the lung seen following polymer fragmentation and embolization from a central venous catheter. Polymer emboli detected microscopically are intravascular and consist of basophilic, lamellated, and nonrefractile elements. Typically, an inflammatory response is present to a variable degree. Embolization can result in severe tissue injury with ischemia and infarction.  相似文献   
995.
996.
Sexuality Related Social Support Among Lesbian, Gay, and Bisexual Youth   总被引:1,自引:0,他引:1  
Lesbian, gay, and bisexual (“LGB”) youth may face significant stressors related to their sexual orientation. Few studies, however, have examined youth’s experiences of support for coping with these stressors. The current study compared LGB youth’s perceptions of support for sexuality stress to their support for other types of problems. The links between sexuality stress, sexuality support, and emotional distress were also examined. Ninety-eight LGB youth (ages 18–21, 33% female) rated support from family, heterosexual friends, and sexual minority friends for dealing with problems related, and not related, to their sexuality. From family and heterosexual friends, support for sexuality stress was less available than support for other stressors. Sexual minority friends provided the highest levels of sexuality support. In regression analyses, higher levels of sexuality support related to decreased emotional distress and buffered against the negative effects of sexuality stress on emotional distress. Sexuality support, although less available than other types of support, may be especially relevant to mental health among LGB youth.  相似文献   
997.
998.
We examined the additive and interactive effects of pre‐admonition suggestion and lineup instructions (biased or unbiased) on eyewitness identification rates. Participants watched a mock crime video, completed a target‐absent lineup identification, and completed a retrospective memory questionnaire. Prior to attempting an identification, participants were either exposed or not exposed to pre‐admonition suggestions and received biased or unbiased lineup instructions. The pre‐admonition suggestion indicated that it was likely that the perpetrator was in the lineup (surely, you can pick the perpetrator). The pre‐admonition suggestion increased false identification in the unbiased lineup condition. Furthermore, those who received the pre‐admonition suggestion were more certain in their identifications as well as other testimony‐relevant judgments than were those who did not receive the pre‐admonition suggestion. These results suggest that pre‐lineup suggestion can mitigate the beneficial effects of unbiased lineup instructions.  相似文献   
999.
1000.
Disordered eating behaviors and substance use are two risk factors for the development of serious psychopathology and health concerns in adulthood. Despite the negative outcomes associated with these risky behaviors, few studies have examined potential associations between these risk factors as they occur during adolescence. The importance of accurate or inaccurate weight perception among adolescents has received increased interest given documented associations with nutritional beliefs and weight management strategies. This study examined the associations among the perceptions of weight and substance use with disordered eating behaviors among a diverse sample of normal weight and overweight adolescent males and females. Data came from the 2007 National Youth Risk Behavior Survey (YRBS). The sample consisted of 11,103 adolescents (53.4% female; 44% Caucasian, 21% African American; 13% Hispanic; age responses ranged from 12 and under to 18 and over), with 31.5% meeting criteria for being either at-risk for obesity or already obese (i.e., overweight). As hypothesized, overestimation of weight among normal weight adolescents and accurate perceptions of weight among overweight adolescents were associated with higher rates of disordered eating behaviors. In normal weight adolescents, use of all three substances (tobacco, binge drinking, and cocaine) was associated with each disordered eating behavior. In contrast, findings revealed differences for overweight adolescents between the type of substance use and disordered eating behavior. Post hoc analyses revealed that gender moderated some of these relationships among overweight individuals. Implications for the development and implementation of secondary prevention programs aimed at reducing disordered eating behaviors, substance use, and obesity risk among normal and overweight adolescents are considered.  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