全文获取类型
| 收费全文 | 23531篇 |
| 免费 | 142篇 |
| 国内免费 | 19篇 |
专业分类
| 各国政治 | 659篇 |
| 工人农民 | 553篇 |
| 世界政治 | 1110篇 |
| 外交国际关系 | 1103篇 |
| 法律 | 12554篇 |
| 中国共产党 | 772篇 |
| 中国政治 | 2018篇 |
| 政治理论 | 2555篇 |
| 综合类 | 2368篇 |
出版年
| 2023年 | 77篇 |
| 2022年 | 120篇 |
| 2021年 | 220篇 |
| 2020年 | 558篇 |
| 2019年 | 449篇 |
| 2018年 | 483篇 |
| 2017年 | 586篇 |
| 2016年 | 577篇 |
| 2015年 | 652篇 |
| 2014年 | 711篇 |
| 2013年 | 1669篇 |
| 2012年 | 838篇 |
| 2011年 | 1067篇 |
| 2010年 | 1403篇 |
| 2009年 | 1321篇 |
| 2008年 | 1096篇 |
| 2007年 | 1201篇 |
| 2006年 | 1362篇 |
| 2005年 | 1058篇 |
| 2004年 | 499篇 |
| 2003年 | 519篇 |
| 2002年 | 549篇 |
| 2001年 | 812篇 |
| 2000年 | 498篇 |
| 1999年 | 421篇 |
| 1998年 | 213篇 |
| 1997年 | 153篇 |
| 1996年 | 128篇 |
| 1995年 | 165篇 |
| 1994年 | 170篇 |
| 1993年 | 147篇 |
| 1992年 | 250篇 |
| 1991年 | 269篇 |
| 1990年 | 267篇 |
| 1989年 | 271篇 |
| 1988年 | 245篇 |
| 1987年 | 212篇 |
| 1986年 | 233篇 |
| 1985年 | 246篇 |
| 1984年 | 234篇 |
| 1983年 | 196篇 |
| 1982年 | 162篇 |
| 1981年 | 141篇 |
| 1980年 | 134篇 |
| 1979年 | 161篇 |
| 1978年 | 101篇 |
| 1977年 | 84篇 |
| 1976年 | 70篇 |
| 1975年 | 73篇 |
| 1974年 | 80篇 |
排序方式： 共有10000条查询结果，搜索用时 0 毫秒
801.
Historical and recent challenges to the practice of comparative forensic examination have created a driving force for the formation of objective methods for toolmark identification. In this study , fifty sequentially manufactured chisels were used to create impression toolmarks in lead (500 toolmarks total). An algorithm previously used to statistically separate known matching and nonmatching striated screwdriver marks and quasi-striated plier marks was used to evaluate the chisel marks. Impression toolmarks, a more complex form of toolmark, pose a more difficult test for the algorithm that was originally designed for striated toolmarks. Results show in this instance that the algorithm can separate matching and nonmatching impression marks, providing further validation of the assumption that toolmarks are identifiably unique. 相似文献
802.
Gianpiero Boatto M.D. Claudia Trignano M.D. Lucia Burrai M.D. Andrea Spanu M.D. Maria Nieddu Ph.D. 《Journal of forensic sciences》2015,60(Z1):S231-S233
In some countries, it is illegal to drive with any detectable amount of alcohol in blood; in others, the legal limit is 0.5 g/L or lower. Recently, some defendants charged with driving under the influence of alcohol and have claimed that positive breath alcohol test results were due to the ingestion of homeopathic mother tinctures. These preparations are obtained by maceration, digestion, infusion, or decoction of herbal material in hydroalcoholic solvent. A series of tests were conducted to evaluate the alcoholic content of three homeopathic mother tinctures and their ability to produce inaccurate breath alcohol results. Nine of 30 subjects gave positive results (0.11–0.82 g/L) when tests were taken within 1 min after drinking mother tincture. All tests taken at least 15 min after the mother tincture consumption and resulted in alcohol-free readings. An observation period of 15–20 min prior to breath alcohol testing eliminates the possibility of false-positive results. 相似文献
803.
According to biomechanics of fracture production during blunt impact, tubular bones are subject to compressive (impact site) and tensile (opposite impact site) forces; this causes bones to break in tension before compression, producing Y-shaped fracture patterns with breakaway (butterfly) fragments. In current forensic models, the side of the bone exhibiting the breakaway fragment is designated the impact side, with initial breakage occurring opposite. Fracture production and patterning of blunt impacts to 255 sheep femora were analyzed. Contra the existing model, only 60% of complete butterfly fractures exhibited impact side breakaway fragments. Although fractures initiated on the tension, nonimpact side, butterfly fragments formed on either compression or tension sides. Using newly defined breakaway fragment shape criteria, impact side was estimated with 98% accuracy for both complete and partial butterfly fractures. Furthermore, the results suggest that the impact site is the located on one of the Y-fracture's arms, not the butterfly fragment's center, as previously modeled. 相似文献
804.
Do legal elites—lawyers admitted to federal appellate bars—perceive the Supreme Court as a “political” institution? Legal elites differentiate themselves from the mass public in the amount and sources of information about the Court. They also hold near‐universal perceptions of Court legitimacy, a result we use to derive competing theoretical expectations regarding the impact of ideological disagreement on various Court perceptions. Survey data show that many legal elites perceive the Court as political in its decision making, while a minority perceive the Court as activist and influenced by external political forces. Ideological disagreement with the Court's outputs significantly elevates political perceptions of decision making, while it exhibits a null and moderate impact on perceptions of activism and external political influence, respectively. To justify negative affect derived from ideological disagreement, elites highlight the political aspects of the Court's decision making rather than engage in “global delegitimization” of the institution itself. 相似文献
805.
Don D Marshall Senior Fellow 《Third world quarterly》2013,34(5):917-938
This article examines the role and force of international finance in contemporary capitalism and the norms being established by international financial governance structures. More than the matter of exclusion, the article argues that financial stability discourse girding issues related to the nature of capital market liberalisation, terrorist financing, money laundering and tax evasion attempts to suture over, erase and/or render illegitimate ideational resistance—particularly by offshore financial centres (ofcs) of the global South. The ongoing experience of the English-speaking Caribbean ofcs is discussed as local operatives have long been simultaneously framing as well as resisting Anglo-American insistence on a new configuration of market ethics, norms and sociality in the virtual world of ‘shores’ and high finance. This adds to the emerging body of work seeking to discursively unpack financialisation. 相似文献
806.
This paper focuses on how Airbnb, an internet platform which has created the possibility for mass participation in the tourism market, is resulting in class conflict between new entrants and the ‘traditional’ tourism industry. Specifically, it studies how traditional tourism interests in Barbados have responded to Airbnb by seeking to restrict participation in the industry and presents this as a microcosm of broader class transitions and conflicts associated with new technologies. The paper utilises a Marxist theoretical perspective buttressed by Joseph Schumpeter’s theory of ‘creative destruction’ – places emphasis on the process of destroying productive systems to understand how specific industries expand and survive – and Clayton Christensen’s notion of ‘disruptive innovation’ – a process by which a disruptive product transforms a market – for studying how transformations in technology are impacting the tourism industry in Barbados. Its aim is to provide an account of how the process of disruption is unfolding in Barbados by highlighting the reactions of the main hotel lobby group to Airbnb, while also applying the ideas of Marx, Schumpeter and Christensen as useful theoretical lenses through which to examine the unfolding of the process of disruption of settled class and historical control of a dominant economic sector by new technologies. 相似文献
807.
808.
In China industrial clusters consisting of small and medium enterprises have been proliferating in areas where private sectors have successfully developed. This study inquires into the process of forming a new industrial cluster and the roles of local and distant urban traders in the garment industry in China. We found that the local marketplace, where enterprise managers can easily purchase materials from and sell products to local traders, plays a critical role in stimulating the entry of new enterprises in the early stage of cluster development. As a cluster develops, however, entrepreneurial ability in producing high-quality products and marketing them to urban traders plays a more significant role. 相似文献
809.
This paper explores linkages between the demand for health care providers and the consumption of food, non-food goods, and leisure in Vietnam, using a mixed continuous/discrete dependent variable model. Cross-price elasticities calculated from the model suggest there are strong substitution effects between health care, leisure, and certain commodities. The model allows us to explore the implications of replacing user fees with alternative forms of health care finance, such as commodity taxes. In particular, the results suggest financing public health care services with a non-food sales tax rather than user fees would be more progressive and would improve access to care. 相似文献
810.
Producers in small-scale rural markets often receive unfavourable prices for their goods as a result of more powerful market participants. This study uses a combination of price analysis and interview data to assess the position of snake hunters in the aquatic snake market from Tonle Sap Lake in Cambodia. Despite the hunters' dependence on intermediary traders for market access and credit, the evidence implies that they are not powerless participants. Intermediary traders operate under high competition as a result of the increasing scarcity of snakes and therefore, despite interlocked credit and snake markets, offer relatively high prices to hunters. 相似文献