全文获取类型
收费全文 | 20803篇 |
免费 | 689篇 |
国内免费 | 5篇 |
专业分类
各国政治 | 823篇 |
工人农民 | 933篇 |
世界政治 | 1405篇 |
外交国际关系 | 742篇 |
法律 | 13292篇 |
中国共产党 | 6篇 |
中国政治 | 179篇 |
政治理论 | 3917篇 |
综合类 | 200篇 |
出版年
2020年 | 271篇 |
2019年 | 343篇 |
2018年 | 438篇 |
2017年 | 505篇 |
2016年 | 519篇 |
2015年 | 358篇 |
2014年 | 399篇 |
2013年 | 1949篇 |
2012年 | 552篇 |
2011年 | 603篇 |
2010年 | 480篇 |
2009年 | 521篇 |
2008年 | 596篇 |
2007年 | 653篇 |
2006年 | 640篇 |
2005年 | 554篇 |
2004年 | 561篇 |
2003年 | 586篇 |
2002年 | 496篇 |
2001年 | 818篇 |
2000年 | 720篇 |
1999年 | 597篇 |
1998年 | 297篇 |
1997年 | 229篇 |
1996年 | 256篇 |
1995年 | 224篇 |
1994年 | 259篇 |
1993年 | 243篇 |
1992年 | 412篇 |
1991年 | 443篇 |
1990年 | 455篇 |
1989年 | 389篇 |
1988年 | 440篇 |
1987年 | 383篇 |
1986年 | 408篇 |
1985年 | 372篇 |
1984年 | 300篇 |
1983年 | 289篇 |
1982年 | 227篇 |
1981年 | 244篇 |
1980年 | 174篇 |
1979年 | 224篇 |
1978年 | 158篇 |
1977年 | 131篇 |
1976年 | 131篇 |
1975年 | 151篇 |
1974年 | 168篇 |
1973年 | 130篇 |
1972年 | 119篇 |
1970年 | 117篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
62.
63.
Based on interviews with facility managers in the electroplating and chemical industries, this study examines regulated firms’ perceptions of how various instrumental, normative, and social factors motivated their firms’ environmental actions. We found that “implicit general deterrence” (the overall effect of sustained inspection and enforcement activity) was far more important than either specific or general deterrence, and that deterrence in any form was of far greater concern to small and medium‐sized enterprises than it was to large ones. Most reputation‐sensitive firms in the environmentally sensitive chemical industry chose to go substantially beyond compliance for reasons that related to risk management and to the perceived need to protect their social license to operate. Almost half our respondents also provided normative explanations for why they complied. Overall, we conclude that there are various, often interwoven, strands that must be taken into account in understanding what motivates corporate environmental behavior, and how they play out depends very much on the size and sophistication of companies themselves and on the characteristics of the industry sector within which they are located. 相似文献
64.
CAROLINE A. WILLIAMS 《Bulletin of Latin American research》2007,26(2):181-199
This article explores the consequences for the native population of the Colombian Chocó of the emergence, over the course of the eighteenth century, of an elite of caciques and indios mandones or principales whose functions of powers far exceeded those of the warrior chiefs that had traditionally acted as leaders of their people. Appointed for the purpose of facilitating the collection of tribute and the supply of labour to European settlers, caciques and mandones were almost universally rejected by native communities during the early phases of Spanish colonisation (c. 1630–1690), and they disappear from the historical record after Independence. Eighteenth‐century sources, however, not only record the existence of a clearly defined elite of mandones or principales in villages across the region, but show these individuals engaging actively with the colonial authorities, on behalf of their communities, at local and audiencia levels. This article argues that, at a time of a much strengthened European presence in the region, caciques and mandones came to understand their roles in ways that were entirely different from those intended by the Spanish, and in so doing acquired the legitimacy that had eluded their seventeenth‐century predecessors. Far from serving merely as intermediaries between settlers and indigenous populations, indios mandones acted as negotiators on behalf of the indigenous population, whose task was to defend and/or advance the interests of the communities they had been appointed to control. 相似文献
65.
Prior studies of recidivism have focused almost exclusively on individual‐level characteristics of offenders and their offenses to explore the correlates of reoffending. Notably absent from these studies are measures reflecting the neighborhood contexts in which individuals live. The current research addresses this shortcoming. Using data on a sample of ex‐offenders in Multnomah County, Oregon (Portland and surrounding area) in conjunction with 2000 census data, we answer two questions. First, which individual‐level factors influence rates of recidivism? Second, to what extent does neighborhood socioeconomic status account for variation in the reoffending behavior of ex‐prisoners that is not explained by their individual‐level characteristics? We find that those who return to disadvantaged neighborhoods recidivate at a greater rate while those who return to resource rich or affluent communities recidivate at a lesser rate, controlling for individual‐level factors. 相似文献
66.
Alexander M Holsinger Christopher T LowenkampEdward J Latessa 《Journal of criminal justice》2003,31(4):309
Offender assessment and classification is becoming an increasingly important part of correctional supervision and intervention. Over the last several decades, several different methods and “generations” of offender classification have emerged. Of most value appear to be third-generation, actuarial, dynamic risk/need assessments. With any new correctional strategy, however, there is a need to investigate the use of these risk/need assessments on offender subgroups in order to inform issues, such as reliability and prevalence of criminogenic risk factors. The present study utilized data that were gathered using the Level of Service Inventory-Revised (LSI-R). Results and comparisons of these assessments were investigated and presented for Native American and non-Native American offenders as well as male and female offenders. Discussion of the results, implications, and recommendations for further research are presented. 相似文献
67.
68.
A fatality following ingestion of the drug baclofen (Lioresal) is described. Baclofen was identified in urine by gas chromatography/mass spectrometry. After derivatization with trinitrobenzene sulfonic acid, baclofen was quantitated in serum and urine by high-performance liquid chromatography. The concentration of baclofen was 17 mg/L in serum and 760 mg/L in urine collected approximately 12 h after the overdose. To our knowledge, this is only the second reported fatality involving a baclofen overdose. The previous case did not include quantitation of baclofen in any biological fluid. 相似文献
69.
We use data from 1983 and 1985 on the volume of Medicare physician services to analyze whether Medicare's Prospective Payment System (PPS), which resulted in a significant decline in hospital spending, led to a partially offsetting increase in real expenditures for physician services. We also analyze the effect of increases in assignment rates, increasing incomes of the elderly, and other factors on real expenditures during this period. Our main conclusion is that PPS has at most a small positive effect on real physician expenditures. Because people spent less time in the hospital, Medicare physician spending declined; but because of incentives to shift radiology and other services out of the hospital, some of this decline was offset. We also conclude that the sharp increase in Medicare assignment rates over this period, along with the rising incomes of the elderly during this period, contributed to the observed growth. 相似文献
70.