全文获取类型
收费全文 | 3854篇 |
免费 | 261篇 |
专业分类
各国政治 | 67篇 |
工人农民 | 73篇 |
世界政治 | 105篇 |
外交国际关系 | 275篇 |
法律 | 1935篇 |
中国共产党 | 41篇 |
中国政治 | 417篇 |
政治理论 | 411篇 |
综合类 | 791篇 |
出版年
2024年 | 7篇 |
2023年 | 76篇 |
2022年 | 64篇 |
2021年 | 67篇 |
2020年 | 145篇 |
2019年 | 107篇 |
2018年 | 128篇 |
2017年 | 171篇 |
2016年 | 155篇 |
2015年 | 93篇 |
2014年 | 218篇 |
2013年 | 350篇 |
2012年 | 263篇 |
2011年 | 267篇 |
2010年 | 187篇 |
2009年 | 238篇 |
2008年 | 234篇 |
2007年 | 256篇 |
2006年 | 219篇 |
2005年 | 206篇 |
2004年 | 178篇 |
2003年 | 134篇 |
2002年 | 103篇 |
2001年 | 84篇 |
2000年 | 48篇 |
1999年 | 29篇 |
1998年 | 11篇 |
1997年 | 4篇 |
1996年 | 5篇 |
1995年 | 20篇 |
1994年 | 3篇 |
1993年 | 3篇 |
1992年 | 8篇 |
1991年 | 3篇 |
1990年 | 3篇 |
1989年 | 2篇 |
1988年 | 3篇 |
1987年 | 6篇 |
1986年 | 8篇 |
1985年 | 3篇 |
1984年 | 3篇 |
1983年 | 3篇 |
排序方式: 共有4115条查询结果,搜索用时 15 毫秒
331.
随着经济全球化、信息技术化、交际多模态化的转变,越来越多的中国大学英语教师认识到多模态的重要性,并将多模态教学方式应用于教学中。大学英语课堂不再局限于单一模态的语言教学,而是应用多种模态,包括音频、视频、PPT、互联网、模拟实验室等,给予学生多样化的课堂学习氛围,很大程度上激发了学生的学习兴趣。文章探讨多模态话语分析理论在课堂教学中的应用情况。 相似文献
332.
Sungsoon Hwang 《Housing Policy Debate》2015,25(1):91-115
This article considers how spatial analysis of housing submarkets can advance research into residential segregation. While an emphasis on housing submarkets has been proposed as a new construct for modeling housing prices, its use in analyzing residential segregation has been limited. Recent advances in spatial analysis and geographic information systems present new opportunities for researchers to exploit the potential of housing submarkets as constructs that offer a more precise way to examine residential segregation. The article synthesizes literature related to residential segregation and housing submarkets and demonstrates how to delineate housing submarkets using publicly available data. It examines the spatial distribution of housing submarkets and how the socially disadvantaged are represented across housing submarkets in St. Louis, Missouri, and Cincinnati, Ohio, to conclude that St. Louis's housing market is more polarized and racially segregated than Cincinnati's. Spatial analysis of housing submarkets, in conjunction with archival analysis, provides a promising avenue for identifying residential segregation as a multidimensional phenomenon, and a means to explore local processes of urban inequality. 相似文献
333.
In this study, we critically examine the ways in which a nationwide health promotion campaign – the 2013 Diabetes UK/Tesco diabetes campaign, the largest of its kind in the UK – seeks to raise the general public's awareness of Type 2 diabetes. We subject a series of six campaign images (including their layout and accompanying text) to a multimodal discourse analysis, identifying the presence of a range of fear-inducing, stigmatising and commercial strategies, through which the campaign emphasises the dangers of diabetes and advocates personal responsibility for assessing both individual and others' risk of the disease. Specifically, we describe, in multi-semiotic detail, three discursive techniques deployed in the campaign to achieve these ends: (1) the depiction of grief and amplification of diabetes-related danger, (2) the promotion of diabetes risk and localisation of individuals' responsibility for their health and (3) the commercial branding and framing of the Diabetes UK/Tesco partnership – including the promotion of goods and services – as a means of diabetes prevention and management. Our findings raise concerns about the moral legitimacy of using fear-inducing and commercial strategies in order to (effectively) raise public awareness of and responses to Type 2 diabetes, strategies which do little to address the environmental factors which are associated with increasing rates of the disease. 相似文献
334.
Michele Zappavigna 《社会征候学》2015,25(3):274-291
An important dimension of social media discourse is its searchability. A key semiotic resource supporting this function is the hashtag, a form of social tagging that allows microbloggers to embed metadata in social media posts. While popularly thought of as topic-markers, hashtags are able to construe a range of complex meanings in social media texts. This paper uses the concept of linguistic metafunctions, to explore how hashtags enact three simultaneous communicative functions: marking experiential topics, enacting interpersonal relationships, and organizing text. Corpus-based discourse analysis of linguistic patterns in a 100 million word Twitter corpus is used to investigate these functions and how they relate to the notion of social search. 相似文献
335.
336.
Carla Martinez Machain 《国际相互影响》2015,41(3):539-564
This article explores the role that ground troops play in aerial campaigns. Specifically, it intends to explain how ground troops affect the duration of aerial bombing campaigns. It distinguishes between the effect of ground troops on the duration of aerial campaigns that are selective and on those that are more general and less discriminate (using newly coded data on aerial strategies). The effect of ground troops may vary depending on how air power is being used. Ground troops may increase the duration of aerial campaigns in cases in which selective strategies are used during the aerial bombing campaign. In these cases, states lose the possibility of quick, “clean” victories once ground troops are introduced. In the cases of the less-discriminate bombing campaigns, the effect of ground troops is the opposite: They shorten the duration of the bombing campaign, possibly through the increased effectiveness of a combined arms approach. 相似文献
337.
DAVID WEISBURD 《犯罪学》2015,53(2):133-157
According to Laub (2004), criminology has a developmental life course with specific turning points that allow for innovations in how we understand and respond to crime. I argue that criminology should take another turn in direction, focusing on microgeographic hot spots. By examining articles published in Criminology, I show that only marginal attention has been paid to this area of study to date—often termed the criminology of place. I illustrate the potential utility of a turning point by examining the law of crime concentration at place, which states that for a defined measure of crime at a specific microgeographic unit, the concentration of crime will fall within a narrow bandwidth of percentages for a defined cumulative proportion of crime. By providing the first cross‐city comparison of crime concentration using a common geographic unit, the same crime type, and examining a general crime measure, I find strong support for a law of crime concentration. I also show that crime concentration stays within a narrow bandwidth across time, despite strong volatility in crime incidents. By drawing from these findings, I identify several key research questions for future study. In conclusion, I argue that a focus on the criminology of place provides significant opportunity for young scholars and has great promise for advancing criminology as a science. 相似文献
338.
Assessment of Maceration Techniques Used to Remove Soft Tissue from Bone in Cut Mark Analysis 下载免费PDF全文
Maceration techniques employed in forensics must be effective without compromising the bone's integrity and morphology, and prevent destruction of evidence. Techniques must also be fast, safe, easily obtainable and inexpensive; not all techniques currently employed are appropriate for forensic use. To evaluate the most suitable approach, seven techniques including current and new methodologies were applied to fresh, fleshed porcine ribs exhibiting cut marks. A sample size of 30 specimens per technique was examined under scanning electron microscopy at the cut mark and the surrounding uncompromised regions; a scoring system of effectiveness was applied. The previously unpublished microwave method fared best for bone and cut mark preservation. Sodium hypochlorite destroyed cut marks, and was deemed unsuitable for forensic analysis. No single technique fulfilled all criteria; however, this study provides a benchmark for forensic anthropologists to select the most appropriate method for their situation, while maintaining the high standards required by forensic science. 相似文献
339.
Methoxetamine (MXE) is a new synthetic drug of abuse structurally related to ketamine and phencyclidine. A case of a 29-year-old male with acute toxicity related to the analytically confirmed use of MXE is reported. The man was found dead at his residence. Biological material was analyzed using liquid chromatography–tandem mass spectrometry. The concentration of MXE in urine of the deceased was 85 μg/mL. Despite the vial containing the blood sample being destroyed during transportation and the blood leaking out into the cardboard packaging, the blood level of MXE was estimated. After determination of the cardboard grammage (approx. 400 g/m3) and the mean mass of the blood obtained after drying (0.1785 ± 0.0173 g per 1 mL), the estimated blood concentration of MXE was found to be 5.8 μg/mL. The high concentration of MXE in blood and urine and the circumstances of the case indicate an unintentional, fatal intoxication with this substance. 相似文献
340.
Melissa D. Suarez M.S. Randal J. Southard Ph.D. Sanjai J. Parikh Ph.D. 《Journal of forensic sciences》2015,60(4):894-905
Soil samples have potential to be useful in forensic investigations, but their utility may be limited due to the inherent variability of soil properties, the wide array of analytical methods, and complexity of data analysis. This study examined the differentiation of similar soils based on both gross (texture, color, mineralogy) and explicit soil properties (elemental composition, cation exchange, Fe‐oxyhydroxides). Soils were collected from Fallbrook and adjacent map units from Riverside and San Diego Counties in California. Samples were characterized using multiple techniques, including chemical extracts, X‐ray diffraction (XRD), and Fourier transform infrared spectroscopy. Results were analyzed using multiple analytical approaches to compare counties and land uses. Some analyses (XRD, extractions) were better at distinguishing among samples than others (color, texture). Ratios of rare earth elements were particularly useful for distinguishing samples between counties. This potential to “fingerprint” soils illustrates the usefulness of a comprehensive soil database for criminal investigators. 相似文献