全文获取类型
收费全文 | 79281篇 |
免费 | 3041篇 |
专业分类
各国政治 | 4728篇 |
工人农民 | 3168篇 |
世界政治 | 6685篇 |
外交国际关系 | 4001篇 |
法律 | 40422篇 |
中国共产党 | 13篇 |
中国政治 | 795篇 |
政治理论 | 21562篇 |
综合类 | 948篇 |
出版年
2021年 | 444篇 |
2020年 | 1212篇 |
2019年 | 1567篇 |
2018年 | 1890篇 |
2017年 | 2127篇 |
2016年 | 2357篇 |
2015年 | 1881篇 |
2014年 | 2143篇 |
2013年 | 10849篇 |
2012年 | 1909篇 |
2011年 | 2097篇 |
2010年 | 2018篇 |
2009年 | 2218篇 |
2008年 | 2065篇 |
2007年 | 2098篇 |
2006年 | 2215篇 |
2005年 | 2077篇 |
2004年 | 1961篇 |
2003年 | 1759篇 |
2002年 | 1793篇 |
2001年 | 2286篇 |
2000年 | 2022篇 |
1999年 | 1705篇 |
1998年 | 1252篇 |
1997年 | 1089篇 |
1996年 | 1058篇 |
1995年 | 1011篇 |
1994年 | 1024篇 |
1993年 | 1028篇 |
1992年 | 1245篇 |
1991年 | 1274篇 |
1990年 | 1234篇 |
1989年 | 1240篇 |
1988年 | 1238篇 |
1987年 | 1243篇 |
1986年 | 1257篇 |
1985年 | 1274篇 |
1984年 | 1129篇 |
1983年 | 1158篇 |
1982年 | 978篇 |
1981年 | 898篇 |
1980年 | 727篇 |
1979年 | 867篇 |
1978年 | 677篇 |
1977年 | 586篇 |
1976年 | 540篇 |
1975年 | 493篇 |
1974年 | 525篇 |
1973年 | 515篇 |
1972年 | 450篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
281.
282.
283.
The extent to which local life circumstances influence criminal activity has been the focus of much theoretical debate. Although empirical research has been initiated, it remains limited. Herein, we use data on 524 serious offenders from the California Youth Authority for a seven‐year post‐parole period to examine the relationship between changes in local life circumstances and criminal activity. We extend previous research by employing a statistical model that accounts for the joint distribution of violent and nonviolent crime during the late teens and twenties in order to present information on patterns of criminal activity during a newly recognized developmental period of the life course, “emerging adulthood.” 相似文献
284.
It is a central tenet of most contemporarytheories of justice that the badly-off have aright to some of the resources of the well-off.In this paper, I take as my starting point twoprinciples of justice, to wit, the principle ofsufficiency, whereby individuals have a rightto the material resources they need in order tolead a decent life, and the principle ofautonomy, whereby once everybody has such alife, individuals should be allowed to pursuetheir conception of the good, and to enjoy thefruits of their labour in pursuit of suchconception. I also endorse the value offairness, whereby the right person orinstitution makes the decision as to whether tobring about justice.I show that justice and fairness can besatisfied only if we all enjoy a combination ofprivate and collective rights over the world.In making that case, I shall argue that the setof ownership rights I advocate differs fromreadily available conceptions of restrictedprivate ownership in two important respects.First, it is such that in some circumstances,two individuals or more can have control rightsover the same property at the same time, not,as is standardly the case in legal systems, bycontracting with one another (through gifts andjoint purchase), but simply on grounds ofjustice. Second, it allows that, if necessary,property-owners be expropriated from theirproperty without compensation. 相似文献
285.
On the basis of the uncertainty management model, we argue here that when people are uncertain about an organization's trustworthiness, they may resolve the question how they should react toward the organization by relying on their perceptions of the organization's procedures. As a consequence, we predicted that the reactions of parents whose child was in a day care center would be strongly influenced by their perceptions of the procedures used by the organization that was responsible for their children's day care when the parents would be uncertain about the organization's trustworthiness. However, when parents would be certain that the organization could be trusted they would be less in need of procedural information, yielding less strong effects of perceived procedure on parents' reactions. The findings of a survey study corroborate this line of reasoning. In the discussion it is argued that these findings suggest that people especially rely on their perceptions of procedures when they are uncertain about important aspects of their lives, such as the trustworthiness of organizations that are responsible for their children's day care. 相似文献
286.
D J WILLIAMS WILLIAM B. STREAN ENRIQUE GARCIA BENGOECHEA 《Juvenile & family court journal》2002,53(2):31-41
This article discusses relevant literature on the potential benefits of sport, recreation, and leisure, and how these benefits relate to rehabilitation of juveniles. Many professionals involved in juvenile rehabilitation believe sport and recreation are beneficial adjuncts to treatment programming; however, it can be difficult to structure sport and recreation in ways that directly correspond to treatment goals. The purpose of this article is to provide insights for professionals working with juveniles on how sport and recreation programming can be an effective means of helping to achieve rehabilitation goals. Attention is given to approaches, particularly the Teaching Games for Understanding model (Bunker & Thorpe, 1982), which can be used to effectively link recreation and sport to the rehabilitation process. 相似文献
287.
颅脑损伤患者智能和记忆损害的相关因素研究 总被引:3,自引:0,他引:3
目的探讨交通事故所致颅脑损伤伤者的智能和记忆损害及相关因素。方法 统计分析成都市1999年1月1日至2001年12月31日间因交通事故造成颅脑损伤的652例伤者的心理测验、脑电图及脑影像学资料。结果研究组平均智商为77.85±15.97,27.9%的伤者智商低于70;51.9%的记忆商低于51。智力损害与文化程度、左颞叶损伤、≥3个脑叶损伤以及脑电图异常明显相关;记忆损害与文化程度、损伤和鉴定检查的间隔时间、脑于损伤、左颞叶损伤、脑电图异常明显相关。结论交通事故造成颅脑损伤的伤者多有不同程度的智力和记忆损害,且与左颞叶损伤、脑电图异常、文化程度、脑干损伤等因素有关。 相似文献
288.
289.
This article outlines the new regionalism movement and its metropolitanagenda, reviews federal efforts to promote new regionalism underISTEA and TEA21, considers how the new federal policieschanged the role of metropolitan planning organizations (MPOs)in transportation planning by examining the MPO for the Louisvillemetropolis, and assesses the MPO process in Louisville. Thelocal decision of whether to build a new bridge across the OhioRiver was a major test of the enhanced MPO process. Federaltransportation policies enhanced regional coordination and cooperationin transportation planning in the Louisville metropolis resultingin a consensus plan to build two bridges across the Ohio River.However, the MPO process did not lead to the development ofa metropolitan-wide interest or perspective. Moreover, the newregionalist agenda was not advanced because sprawl was not afactor in the decision on whether and where to build the bridges. 相似文献
290.
Rebecca Emerson Stephen G. Hall Anna Zalewska-Mitura 《Economic Change and Restructuring》1997,30(2-3):75-90
With new technically advanced methods and computers at our disposal, the efficient market hypothesis is once again being debated. At the same time, we are witnessing an unprecedented growth in both existing and new financial markets. These new markets are often in economies which have just recently embraced free market economics; we term these stock markets infant markets. Such stock markets are obviously not efficient in allocating the supply of savings to productive capital. We do not test whether or not these infant markets are informationally efficient, but instead examine whether and how they are becoming more efficient. We propose modelling the excess returns of individual securities using a multi-factor model with time-varying coefficients and generalised auto-regressive conditional heteroskedastic (GARCH) errors. If the markets are becoming more informationally efficient or the agents are learning, we would expect this to manifest itself as the time-varying coefficients becoming more stable as time increases. We test our model using data on four Bulgarian shares. First, we estimate an AR(2) model and a GARCH-M(1,1) model for the shares. Then, we estimated our AR(2) model with time varying coefficients and GARCH type errors. We find varying levels of efficiency and varying speeds of movement towards efficiency within our sample of four shares. 相似文献