全文获取类型
收费全文 | 18133篇 |
免费 | 327篇 |
专业分类
各国政治 | 505篇 |
工人农民 | 1470篇 |
世界政治 | 773篇 |
外交国际关系 | 588篇 |
法律 | 11066篇 |
中国共产党 | 34篇 |
中国政治 | 127篇 |
政治理论 | 3760篇 |
综合类 | 137篇 |
出版年
2021年 | 64篇 |
2020年 | 154篇 |
2019年 | 137篇 |
2018年 | 1429篇 |
2017年 | 1389篇 |
2016年 | 1250篇 |
2015年 | 285篇 |
2014年 | 239篇 |
2013年 | 875篇 |
2012年 | 425篇 |
2011年 | 1154篇 |
2010年 | 1182篇 |
2009年 | 821篇 |
2008年 | 1030篇 |
2007年 | 998篇 |
2006年 | 336篇 |
2005年 | 363篇 |
2004年 | 467篇 |
2003年 | 377篇 |
2002年 | 268篇 |
2001年 | 355篇 |
2000年 | 330篇 |
1999年 | 259篇 |
1998年 | 164篇 |
1997年 | 126篇 |
1996年 | 158篇 |
1995年 | 146篇 |
1994年 | 150篇 |
1993年 | 127篇 |
1992年 | 199篇 |
1991年 | 250篇 |
1990年 | 212篇 |
1989年 | 198篇 |
1988年 | 222篇 |
1987年 | 201篇 |
1986年 | 221篇 |
1985年 | 194篇 |
1984年 | 175篇 |
1983年 | 166篇 |
1982年 | 108篇 |
1981年 | 123篇 |
1980年 | 101篇 |
1979年 | 106篇 |
1978年 | 96篇 |
1977年 | 86篇 |
1976年 | 64篇 |
1975年 | 65篇 |
1974年 | 66篇 |
1973年 | 77篇 |
1971年 | 50篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
971.
972.
973.
974.
This paper summarizes the results of previous work on the microscopic observation of linear dichroism found in dyed fibres (polyesters, polyamides, wool, silk, cotton, viscose, acrylics and acetates) and in pigmented fibres as well as the measurements on these fibre classes using microspectrophotometry with plane polarized light (MSP-PPL). The validation of this method is discussed and a practical tool is proposed for comparing fibre traces with control fibres. The limitations and strengths of this method are also revised. 相似文献
975.
976.
Suzanne Uniacke 《Law and Philosophy》2011,30(3):253-272
Proportionality is widely accepted as a necessary condition of justified self-defense. What gives rise to this particular
condition and what role it plays in the justification of self-defense seldom receive focused critical attention. In this paper
I address the standard of proportionality applicable to personal self-defense and the role that proportionality plays in justifying
the use of harmful force in self-defense. I argue against an equivalent harm view of proportionality in self-defense, and
in favor of a standard of proportionality in self-defense that requires comparable seriousness and takes into account the
wrong, as opposed simply to the harm that the victim is fending off. I distinguish the standard of proportionality in self-defense
from proportionality in circumstances of necessity, and I discuss whether proportionality is an internal or an external constraint
on the right of self-defense. 相似文献
977.
978.
Engagement in school is crucial for academic success and school completion. Surprisingly little research has focused on the
relationship between student engagement and delinquency. This study examines whether engagement predicts subsequent school
and general misconduct among 4,890 inner-city Chicago elementary school students (mean age: 11 years and 4 months; 43.3% boys;
66.5% black; 28.8% Latino). To improve upon prior research in this area, we distinguish three types of engagement (emotional,
behavioral, and cognitive), examine whether the relationship between engagement and misconduct is bidirectional (misconduct
also impairs engagement), and control for possible common causes of low engagement and misconduct, including peer and family
relationships and relatively stable indicators of risk-proneness. Emotional and behavioral engagement predict decreases in
school and general delinquency. However, cognitive engagement is associated with increases in these outcomes. School and general
delinquency predict decreased engagement only in the cognitive domain. Suggestions for future research and implications for
policy are discussed. 相似文献
979.
The adage that “it is always easier to fight the last war” is one that readily can be applied to the United States and its armed forces for not predicting the scale and type of operations encountered in the occupations of Iraq and Afghanistan. This article argues that the lack of preparation in the post-invasion phases arose from an institutional attachment to a preferred paradigm of warfare, as exemplified by the Persian Gulf War of 1991. This paradigm, though, has been substantially resurrected and re-configured to suit the fighting preferences of the American armed forces in its protracted encounters in Iraq and Afghanistan. Far from re-orienting its organization and mindset to meet the challenges of so-called counterinsurgency campaigns, as much current advocacy maintains, the military has reverted to the form of warfare it knows best. 相似文献
980.
Edmund Terence Gomez 《East Asia》2007,24(2):153-172
This article reviews theoretical perspectives about the development of ethnic Chinese-owned enterprises in two major sets of literature. The first school is one that adopts culture as the primary explanatory tool for the dynamism of Chinese enterprise. The second school employs the concept of transnationalism, which has served to create a link between identity and capitalism, to analyse Chinese entrepreneurship. Both sets of literature argue that common ethnic identity facilitates the creation of business networks, which explains the rise of ‘Chinese capitalism’. This study questions the foundations of these theoretical arguments by tracing the evolution of family firms and by employing the concept of ‘generational change’. 相似文献