全文获取类型
收费全文 | 40877篇 |
免费 | 1623篇 |
出版年
2020年 | 524篇 |
2019年 | 816篇 |
2018年 | 897篇 |
2017年 | 1113篇 |
2016年 | 1198篇 |
2015年 | 924篇 |
2014年 | 900篇 |
2013年 | 14038篇 |
2012年 | 1037篇 |
2011年 | 1064篇 |
2010年 | 1065篇 |
2009年 | 1066篇 |
2008年 | 999篇 |
2007年 | 901篇 |
2006年 | 817篇 |
2005年 | 565篇 |
2004年 | 563篇 |
2003年 | 521篇 |
2002年 | 494篇 |
2001年 | 480篇 |
2000年 | 414篇 |
1999年 | 478篇 |
1998年 | 445篇 |
1997年 | 415篇 |
1996年 | 391篇 |
1995年 | 405篇 |
1994年 | 349篇 |
1993年 | 404篇 |
1992年 | 380篇 |
1991年 | 284篇 |
1990年 | 283篇 |
1989年 | 288篇 |
1988年 | 296篇 |
1987年 | 308篇 |
1986年 | 281篇 |
1985年 | 397篇 |
1984年 | 436篇 |
1983年 | 431篇 |
1982年 | 380篇 |
1981年 | 374篇 |
1980年 | 412篇 |
1979年 | 406篇 |
1978年 | 396篇 |
1977年 | 419篇 |
1976年 | 371篇 |
1975年 | 376篇 |
1974年 | 282篇 |
1973年 | 257篇 |
1972年 | 240篇 |
1970年 | 217篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
911.
912.
913.
914.
John T. Ishiyama 《Nations & Nationalism》1998,4(1):61-85
Abstract. In postcommunist politics many of the ‘new national right’ political formations in Eastern Europe and the former Soviet Union have joined forces with the communist successor parties. Such a combination is, on the surface, a baffling mixture; how is it possible that two fundamentally different ideological approaches (nationalism and internationalist socialism) can coexist and actively cooperate to form such a potent political force? What are the conditions under which such political cooperation emerges? This article attempts to answer the above questions by, first, empirically testing the effects of several factors which might explain postcommunist–nationalist political cooperation. Second, the quantitative analysis is buttressed with a comparison of the Hungarian and Russian cases. The analysis indicates that the most important variable associated with the emergence of postcommunist–nationalist political cooperation is the effect of previous regime type. 相似文献
915.
Vesna V. Godina 《Nations & Nationalism》1998,4(3):409-422
Abstract. In the text some questions about the genesis of radical nationalism on the former Yugoslav territory are discussed. The author's main thesis is that what happened during the outburst of nationalism was an alteration in the status of national identification, particularly in its relation to ‘supranational’ Yugoslav identification; that is, the eruption of radical nationalism was the result of reorganisation within an identification matrix. This thesis is first clarified by a short historical survey of the status of national identification before the outburst of nationalism, and secondly by an analysis of the main changes in the identification matrix during the outbreak of nationalism. Additionally, some of the main characteristics of political socialisation in the Yugoslav socialist state (especially the function of the value ‘brotherhood and unity’), as well as the possibility for future non-conflictual relations between the nations of former socialist Yugoslavia are discussed. 相似文献
916.
Historical records indicate that the fertile soils of the western and central Wimmera Plains of Victoria, Australia formerly supported grassy woodlands on rises and flats, and grasslands on shallow depressions and clay plains. Soil type and micro-relief appear to have been the major factors that determined the distribution of these communities. Burning of the woodlands by Aborigines may have contributed to their open grassy nature. The few ungrazed remnants of Buloke (Allocasuarina luehmannii) woodland support a suite of species that are absent from or uncommon in other Buloke woodland remnants in the region. This work demonstrates that in districts where little intact native vegetation remains, investigation of the distribution and floristic composition of the pre-settlement vegetation can provide useful information for the maintenance and restoration of remnant vegetation. 相似文献
917.
Avril M.C. Maddrell 《Journal of Historical Geography》1996,22(4):373-387
The state school curriculum, and geography in particular, played a role in encouraging emigration to the colonies, if not in actually educating for emigration. Emigration was an implicit and explicit topic in school geography, and was increasingly endorsed after the 1885 Revised Instructions to inspectors of schools which explicitly sought the promotion of emigration to young people as an “honourable enterprise”. Early-twentieth century school geography texts were part of the broader imperial discourse which valorized the settler Dominions over the tropical colonies and portrayed them as the good citizen's choice for emigration. The 1922 Empire Settlement Act represented the British government's most direct intervention in supporting out-migration from Britain, but texts at this time were generally less jingoistic than some of their forerunners, in keeping with the changed attitudes in post-World War I Britain. 相似文献
918.
Jeffrey D. Greene 《政策研究杂志》1996,24(1):135-144
Cities across America look for management strategies useful for accomplishing their responsibilities and programs. While some cities include privatization strategies in their management portfolios, others do not, and the underlying reasons are not readily apparent. This study seeks to gain some insight into this disparity through several questions: Why do some cities use more privatization than others? Are privatization levels higher in fiscally healthy or fiscally stressed cities? Where are the cities that use privatization located? This study attributes municipal privatization levels in medium-sized cities, in part, to degree of wealth, fiscal stress, and location. The findings suggest that privatization levels are higher in wealthy, fiscally healthy, suburban cities. 相似文献
919.
In the last two decades, many states established rail promotion programs in an effort to limit the contraction of their railroad networks. Now federal funds for rail projects are nearly exhausted, and states must decide whether to expand considerably their levels of internal funding for short line investments. Such a decision requires a careful articulation of policy goals, combined with sound cost-benefit techniques. Research shows, however, that states often fail to evaluate the full range of costs and benefits when considering rail investments. Instead, the economic development benefits of local rail service frequently are overstated, while the potential for rail investments to meet broader transportation planning needs is neglected. This paper evaluates the rationale behind state intervention in the rail industry, discusses the tendency of states to focus on economic development to the exclusion of other benefit categories, and presents summary results from an analysis of an investment project in North Carolina. The paper suggests that state funding for rail projects is more likely to be justified based on intermodal substitution benefits generated by local rail service, rather than the railroads' potential to increase jobs. 相似文献
920.
Wolfgang U. Eckart 《Berichte zur Wissenschaftsgeschichte》1996,19(1):1-18
There is no doubt that medical semiotics are having a revival at the moment. Different aspects of yesterday's and today's interest in semiotics and in the historical interpretation of signs of disease in the context of theory and history of medicine can be illuminated: their deciphering as the history of the sign in medicine by historic science, their overestimation by philosophy during the Age of Enlightenment, their reduction to a phenomenology of medicine and natural science during the first half of the 19th century and their transformation to medical diagnostics since the middle of the 19th century and recently even their functionalization as methodical instrument within the history of science. The following will show the change in meaning of medical semiotics. Modern development and especially the transition to medicine, based on natural science, will be emphasized. 相似文献