全文获取类型
收费全文 | 862篇 |
免费 | 77篇 |
专业分类
各国政治 | 66篇 |
工人农民 | 40篇 |
世界政治 | 73篇 |
外交国际关系 | 53篇 |
法律 | 458篇 |
中国政治 | 5篇 |
政治理论 | 232篇 |
综合类 | 12篇 |
出版年
2021年 | 5篇 |
2020年 | 14篇 |
2019年 | 14篇 |
2018年 | 30篇 |
2017年 | 35篇 |
2016年 | 37篇 |
2015年 | 21篇 |
2014年 | 22篇 |
2013年 | 136篇 |
2012年 | 36篇 |
2011年 | 40篇 |
2010年 | 25篇 |
2009年 | 22篇 |
2008年 | 31篇 |
2007年 | 44篇 |
2006年 | 24篇 |
2005年 | 19篇 |
2004年 | 22篇 |
2003年 | 24篇 |
2002年 | 26篇 |
2001年 | 18篇 |
2000年 | 9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 | 13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 | 4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939条查询结果,搜索用时 15 毫秒
921.
Histological Changes in the Thyroid Gland in Cases of Infant and Early Childhood Asphyxia—A Preliminary Study 下载免费PDF全文
A retrospective blinded study of thyroid gland histology was undertaken in 50 infants and young children aged from 1 to 24 months. Deaths were due to (i) suffocation (N = 7), hanging (4), wedging (3), and chest and/or neck compression (4), and (ii) SIDS (20), noncervical trauma (7), organic disease, (4) and drug toxicity (1). In the asphyxia group (N = 18), thyroid gland congestion ranged from 0 to 3+ with 39% of cases (7/18) having moderate/marked congestion. In three cases, focal aggregates of red blood cells (blood islands) were observed within the intrafollicular colloid. These deaths involved chest compression, chest and/or neck compression, and crush asphyxia in a vehicle accident, and all had facial petechiae. Only 22% of the 32 control cases (7/32) had moderate/marked congestion with no blood islands being identified (p < 0.05). Blood islands within the thyroid gland may be caused by congestion associated with crushing or compression and may provide supportive evidence for this diagnosis. 相似文献
922.
Charles Roger Satishkumar Belliethathan 《International Environmental Agreements: Politics, Law and Economics》2016,16(1):91-108
The African Group of Negotiators (AGN) has become a much more significant bargaining coalition in the global climate change negotiations. It has been participating more proactively and on a much more significant scale, and, as a result, it has had a greater impact on bargaining outcomes, notably in Nairobi, Copenhagen and Durban. Yet, at present, the group remains poorly understood by both scholars and policymakers. Compared to other groups in the climate negotiations, such as the Group of 77 and Alliance of Small Island States, it has received relatively little attention. This paper fills this gap by tracking the evolution of the AGN over the course of the climate change negotiations. In the early years after the Earth Summit, it shows that the AGN faced tremendous difficulties pursing regional objectives effectively, largely due to a number of “internal” barriers to participation, which compounded the structural barriers that the continent faced by making it difficult to use “low-power” negotiating strategies such as coalition building, agenda-setting and persuasion. However, in recent years, the group has become much more proactive as a result of greater access to material, ideational and institutional resources. These have relieved, somewhat, the internal barriers that the group faced, making it possible for the AGN to negotiate much more confidently and effectively than before. 相似文献
923.
924.
925.
Roger Koppl 《Science & justice》2019,59(2):166-171
926.
The changing agricultural sector and the challenges faced by smallholders call for the need for farm mechanisation suited to smallholder farming. Conventional four-wheeled tractors (4WTs) are not feasible for many smallholders owing to their high capital costs, unsuitability for fragmented holdings as well as topography and slope. More appropriate technologies are needed such as two-wheeled tractors (2WTs) and their requisite accessories. Our findings show that opportunities exist for the introduction of 2WTs in maize based systems through service provider models combining a number of operations that can be offered throughout the year and targeted to niche areas where 4WT access is unlikely. The paper also suggests that attention needs to be given concurrently to development of the 2WT supply chain to ensure that its profitability is sustainable. 相似文献
927.
928.
Roger Richman 《国际公共行政管理杂志》2013,36(4):443-465
Emerging forms of intergovernmental management include roles for neutrals in a range of problem solving and conflict management situations. Third party intergovernmental mediation has been used to settle adversarial municipal boundary disputes in Virginia since 1980. Settlements fashioned through mediated negotiations are responsive to local officialst concerns. This paper reports on this innovation. 相似文献
929.
Galen Roger Perras 《Diplomacy & Statecraft》2018,29(2):143-166
In 1877, employing the unwanted presence of armed Sioux in western Canada as a useful mechanism, Canada’s Cabinet, represented by Minister of the Interior David Mills, unhappy with perceived British indifference to Canada’s concerns, sought to initiate direct diplomatic relations with the United States. That effort failed, and British opposition to this endeavour was so sharp that Canada made no similar initiative for half a century. Although he failed, Mills’ effort marked the birth of the Functional notion that Canada’s voice should matter more in Imperial foreign policy formulation when its direct interests were at stake, especially when dealing with the United States. 相似文献
930.
Raquel M. Derrick Lisa Callahan Roumen Vesselinov Roger W. Krauel Judith A. Litzenberger Leiana Rae Camp 《Psychological injury and law》2018,11(2):171-183
Veterans Treatment Courts (VTCs) are a type of specialty treatment, problem-solving, criminal court. Though the number of VTCs has increased over the past decade, few research studies have examined their effectiveness. This paper examines the data collected concerning a particular VTC experience, the first 82 Veterans enrolled in the Veterans Treatment Review Calendar Pilot Program conducted by the California Superior Court of the county of San Diego from February 2011 until July 2014 (SDVTRC.) The evidence presented herein concerns the nature of this cohort’s population, the SDVTRC program structure in which these Veterans participated, and the outcomes of participation. SDVTRC participants showed a significant decrease in symptoms on 11 of 12 clinical measures from baseline to 12 months. Particular outcomes of the SDVTRC program were related to factors of military service, such as length of service, number of awards, and discharge status. There were also significant relationships between symptom decrease and court process factors, such as length of time in program and sanctions imparted. This court has a 0% recidivism rate, which is believed to be related to its systematic data collection process that was used to inform individualized treatment plans for participants. Implications for other VTCs are provided. 相似文献