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   858篇
  免费   79篇
各国政治   68篇
工人农民   38篇
世界政治   72篇
外交国际关系   54篇
法律   458篇
中国政治   5篇
政治理论   230篇
综合类   12篇
  2021年   6篇
  2020年   14篇
  2019年   14篇
  2018年   31篇
  2017年   36篇
  2016年   39篇
  2015年   19篇
  2014年   23篇
  2013年   136篇
  2012年   36篇
  2011年   39篇
  2010年   25篇
  2009年   22篇
  2008年   30篇
  2007年   43篇
  2006年   23篇
  2005年   19篇
  2004年   23篇
  2003年   25篇
  2002年   26篇
  2001年   16篇
  2000年   7篇
  1999年   7篇
  1998年   10篇
  1997年   13篇
  1996年   12篇
  1995年   19篇
  1994年   15篇
  1993年   16篇
  1992年   11篇
  1991年   12篇
  1990年   6篇
  1989年   12篇
  1988年   15篇
  1987年   12篇
  1986年   14篇
  1985年   13篇
  1984年   5篇
  1983年   8篇
  1982年   6篇
  1981年   8篇
  1980年   8篇
  1979年   8篇
  1978年   9篇
  1977年   5篇
  1976年   6篇
  1975年   5篇
  1973年   6篇
  1972年   5篇
  1969年   4篇
排序方式: 共有937条查询结果,搜索用时 15 毫秒
81.
Over the past decade, the use of force by the police has become an important public policy concern and topic of social science research. A number of researchers hypothesized about the factors that explain the amount of force used by police officers. Prior research focused almost exclusively on the highest level of force used in police-citizen interactions and neglected to examine the relative amount of forced used by the police compared to that used by suspects. To address this shortcoming, this study analyzed data from three years of official use-of-force reports in the Miami-Dade Police Department (MDPD). Contrary to studies that examine only the use of force by the police, this study found that the relative amount of force used by the police was greatest in the less threatening types of offenses. The implications of this study for research and policy are discussed.  相似文献   
82.
This study analyzed 390 (303 girls and 87 boys) cases of child sexual abuse to understand sex differences in child sexual victimization. Analyses focused on three domains that have received considerable empirical attention: victims' relationships with the offender, type and extent of abuse, and disclosure. Findings largely replicated previous efforts that reported sex differences in terms of victims' relationships with offenders. Although results also replicated previous findings about sex differences in disclosure patterns, these sex differences were minor in comparison with similarities in the way most instances of abuse were eventually identified. In terms of type and extent of abuse, results were the opposite of previous findings: girls, not boys, were the victims of more physical injury, violent threats, and use of force; and girls, not boys, were more likely to have physically resisted abuse. Divergences in findings were interpreted in terms of memory biases and social forces operating differently on the sexes.  相似文献   
83.
This paper sets up a model of household dissolution in which one party decides to leave a household that contains children. We study the effects of divorce law on this decision and, in particular, the role of legal provisions governing the post-dissolution care of the household’s children. In particular, we show that there is an inevitable tension between achieving efficiency in marriage and at the same time achieving efficiency in divorce.  相似文献   
84.
State spaceports are an interesting example of intergovernmentalrelations because activities conducted at such facilities spanthe state, federal, and international realms. Five states—Alaska,California, Florida, New Mexico, and Virginia—are themost visible participants in the process. In this study, thesupporting rationales for such endeavors are discussed withinthe context of the broader contours of intergovernmental relations.The field is a product of the post-Cold War period during whichopportunities for state space activities arose due to changesin the national security environment. Three distinct but interrelatedexplanations are suggested for why the field has developed slowly,although during the past two years, progress in achieving goalshas begun to occur.  相似文献   
85.
86.
87.
Existing research highlights that families face geographic, social, and psychological constraints that may limit the extent to which competition can take hold in school choice programs. In this paper, we address the implications of such findings by creating a network of student flows from 11 cohorts of eighth‐grade students in the Chicago Public Schools (CPS). We applied a custom algorithm to group together schools with similar sending and receiving patterns, and calculated the difference in mean achievement between a student's attended and assigned high schools. For all identified school groupings, we found that the students were on average moving to higher achieving schools. We also found that the movement toward higher achieving schools of the top achievement quartile of students was over twice as large as that of the bottom quartile, but that the flows of both the highest and lowest achieving student quartiles were toward higher achieving destinations. Our results suggest that student movements in CPS between the years of 2001 to 2005 were consistent with creating market pressure for improvement as well as increasing segregation by achievement. However, further research into how schools responded to those movements is required to make inferences about the level or consequences of competition generated by choice‐related reforms during that time.  相似文献   
88.
89.
The ingestion of corrosive substances may produce severe burns to the upper aerodigestive tract and stomach, particularly if the pH is greater than 12 or less than two. There is a biphasic age grouping with adult cases most often involving self‐harm and pediatric cases accidental ingestion. Three cases are reported to demonstrate characteristic features following the ingestion of potassium hydroxide, glacial acetic acid and Lysol®, respectively. All deaths were due to the effects of caustic burns to the upper aerodigestive tract, esophagus and stomach with perforation and/or hemorrhage. The extent of injuries in these cases depends on the nature, amount, and concentration of the agent and on the exposure time. A point to note at autopsy is that tissue damage may also occur from postmortem exposure. Typical injuries involve perioral, limb, and trunk burns, with extensive aerodigestive liquefactive/coagulative necrosis causing hemorrhage and perforation.  相似文献   
90.
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