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   5355篇
  免费   199篇
各国政治   263篇
工人农民   219篇
世界政治   398篇
外交国际关系   152篇
法律   3260篇
中国共产党   1篇
中国政治   60篇
政治理论   1164篇
综合类   37篇
  2021年   35篇
  2020年   80篇
  2019年   81篇
  2018年   108篇
  2017年   131篇
  2016年   119篇
  2015年   115篇
  2014年   106篇
  2013年   580篇
  2012年   156篇
  2011年   133篇
  2010年   118篇
  2009年   125篇
  2008年   148篇
  2007年   156篇
  2006年   145篇
  2005年   142篇
  2004年   146篇
  2003年   136篇
  2002年   138篇
  2001年   191篇
  2000年   180篇
  1999年   136篇
  1998年   72篇
  1997年   60篇
  1996年   46篇
  1995年   65篇
  1994年   65篇
  1993年   52篇
  1992年   102篇
  1991年   96篇
  1990年   111篇
  1989年   97篇
  1988年   89篇
  1987年   89篇
  1986年   110篇
  1985年   118篇
  1984年   78篇
  1983年   84篇
  1982年   55篇
  1981年   49篇
  1980年   46篇
  1979年   50篇
  1978年   58篇
  1976年   35篇
  1975年   50篇
  1974年   67篇
  1973年   57篇
  1972年   42篇
  1969年   41篇
排序方式: 共有5554条查询结果,搜索用时 15 毫秒
971.
972.
Although not common occurrences, schools are occasionally the site of barricaded captive events. To date little research has examined these acts of school violence. The purpose of this article is to describe 19 school barricaded captive events that occurred between February, 1998 and September, 2007 in the United States. Data were analyzed by examination of news reports of each incident, and include the following variables: Incident location (state, community), school level and size, time of day of the event, location of the event within the school, age and sex of the subjects, information about the captives, presence of school resource officers, student screening mechanisms, behavioral changes of the subjects, the subject’s expected outcomes, injuries or fatalities, demands and deadlines, captive escapes and releases, weapons, incident resolution, tactical team response, and negotiations. Results pertain to incident demographics, prevention/mitigation, and response.  相似文献   
973.
Several factors influence the reliability of eyewitness identification evidence. Typically, recognition for same-race faces is better than for different-race faces (the own-race bias), and alcohol intoxication decreases overall face recognition accuracy. This research investigated how alcohol intoxication influences the own-race bias. Asian and European participants completed tests of recognition memory for Asian and European faces when either mildly intoxicated (mean breath alcohol concentration of .05) or when sober. Compared to their sober counterparts, intoxicated participants showed a reduced own-race bias. Specifically, alcohol intoxication had a larger negative effect on the recognition of same-race faces compared to different-race faces. The legal and theoretical implications of these results are discussed.  相似文献   
974.
The race to economic superiority is increasingly occurring on a global scale. Competitors from different countries are employing new types of growth strategies in attempts to win that race. The United States cannot, therefore, continue to rely on outdated economic growth strategies, which include an inability to understand the complexity of the typical industrial technology and the synergies among tiers in high-tech supply chains. In this context, a detailed rationale is provided for maintaining a viable domestic technology-based manufacturing capability. In the United States, the still dominant neoclassical economic philosophy is at best ambivalent on the issue of whether a technology-based economy should attempt to remain competitive in manufacturing or let this sector continue to offshore in response to trends in comparative advantage, as revealed through shifts in relative prices. The paper argues that the neoclassical view is inaccurate and that a new innovation model is required to guide economic growth policy. Specifically, the paper provides (1) a rationale for why an advanced economy such as the United States needs a manufacturing sector; (2) examples of the process of deterioration of competitive positions for individual industries and, more important, entire high-tech supply chains; (3) an explanation of the inadequacy of current economic models for rationalizing needed new policy strategies; and (4) a new economic framework for determining both policy mechanisms and targets for those mechanisms, with emphasis on the systems nature of modern technologies and the consequent requirement for public–private innovation ecosystems to develop and deliver these technologies. Several targets are suggested for major policy mechanisms.  相似文献   
975.
976.
977.
The advance of reproductive technology, coupled with a legal system that cannot keep up, has had a detrimental effect on posthumously conceived children. There is controversy over whether a child conceived after the death of one parent, by way of reproductive technology, is considered a child of that parent for inheritance purposes. An overwhelming majority of state legislatures have not given consideration to the unique question that posthumously conceived children pose. Legislative inaction has forced state courts to apply antiquated laws in the midst of a technological revolution. The result: children are being denied inheritance rights to their deceased parent's estate solely because of the way they were conceived. This Note advocates that all children should be given the same rights and benefits regardless of how they are conceived. To accomplish that goal, this Note proposes a model state statute to be adopted in all states. The model statute deems a posthumously conceived child to be the child of his or her deceased parent, and thus entitled to inheritance rights, if 1) the posthumously conceived child was provided for by will, or 2) the deceased parent intended to be a parent; there is a genetic relationship between parent and child; the child is born within three years from the death of his or her deceased parent; and the child's best interest, balanced against the state's interests, exceeds the state's interest. The desired effect of the statute is to put posthumously conceived children on equal footing with naturally conceived children.  相似文献   
978.
In this study, we randomly assigned 123 sixth and seventh grade classrooms from seven middle schools in the greater Cleveland area to one of two five-session curricula addressing gender violence/sexual harassment (GV/SH) or to a no-treatment control group. A baseline survey and two follow-up surveys were administered immediately after the treatment (Wave 2) and about six months post-treatment (Wave 3). In an earlier paper, we demonstrated the effectiveness of two approaches to youth GV/SH prevention programming (a fact-based, law and justice curriculum and an interaction-based curriculum). In this paper, we explored whether these largely positive findings remain for both girls and boys, including whether girls experience higher levels of GV/SH than boys. Most of our statistical models proved to be non-statistically significant. However, in 2 of our 48 victimization/perpetration (any violence, sexual violence and non-sexual violence) models (across two post-intervention follow-up points), we observed that the interventions reduced peer (male or female, non-dating partner) sexual violence victimization and reduced peer perpetration, but another outcome model indicated that the interventions increased dating perpetration. These mixed findings will need to be explored further in future research. Regarding our primary research question, we observed no statistically significant differences for the treatment multiplied by gender interaction terms for any of the perpetration or victimization outcome models, suggesting that the treatment had similar effects on girls and boys. However, we did observe that boys are more involved in violence than girls: both as victims and perpetrators. Boys experienced significantly more of three types of victimization from peers and dating partners compared to what girls experienced at the hands of their peers and dating partners. As perpetrators, boys committed more sexual victimization against peers (immediately post-intervention only) and more sexual victimization against dating partners than girls. The implications of these results are discussed.  相似文献   
979.
According to World Bank policy, countries remain eligible to borrow from the IBRD until they are able to sustain long-term development without further recourse to Bank financing. Graduation from IBRD is not an automatic consequence of reaching a particular income level, but rather is supposed to be based on a determination of whether the country has reached a level of institutional development and capital-market access that enables it to sustain its own development process without recourse to Bank funding. This paper takes a positive approach to IBRD graduation policy, investigating what income and non-income factors appear to have influenced graduation status in recent decades, based on panel data for 1982 through 2009. Explanatory variables include the per-capita income of the country, as well as measures of institutional development and market access that are cited as criteria by the graduation policy, and other plausible explanatory variables that capture the levels of economic development and vulnerability of the country. We find that the observed correlates of Bank graduation status are generally consistent with the stated policy. Countries that are wealthier, more creditworthy, more institutionally developed, and are less vulnerable to trade, financial, and other shocks are more likely to be graduates. Predicted probabilities generated by the model conform closely to the actual graduation and de-graduation experiences of Trinidad and Tobago and Korea, among other countries, and suggest that Hungary and Latvia may have graduated prematurely—a prediction subsequently borne out by the large loans that they later received from the IBRD in the wake of the global financial crisis.  相似文献   
980.
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