全文获取类型
收费全文 | 15080篇 |
免费 | 351篇 |
专业分类
管理学 | 2003篇 |
民族学 | 75篇 |
人才学 | 2篇 |
人口学 | 1301篇 |
丛书文集 | 97篇 |
教育普及 | 2篇 |
理论方法论 | 1394篇 |
综合类 | 361篇 |
社会学 | 7638篇 |
统计学 | 2558篇 |
出版年
2021年 | 81篇 |
2020年 | 216篇 |
2019年 | 251篇 |
2018年 | 291篇 |
2017年 | 435篇 |
2016年 | 337篇 |
2015年 | 260篇 |
2014年 | 307篇 |
2013年 | 2505篇 |
2012年 | 451篇 |
2011年 | 404篇 |
2010年 | 276篇 |
2009年 | 290篇 |
2008年 | 317篇 |
2007年 | 355篇 |
2006年 | 273篇 |
2005年 | 415篇 |
2004年 | 357篇 |
2003年 | 320篇 |
2002年 | 321篇 |
2001年 | 360篇 |
2000年 | 342篇 |
1999年 | 351篇 |
1998年 | 254篇 |
1997年 | 249篇 |
1996年 | 262篇 |
1995年 | 239篇 |
1994年 | 237篇 |
1993年 | 219篇 |
1992年 | 277篇 |
1991年 | 273篇 |
1990年 | 245篇 |
1989年 | 247篇 |
1988年 | 222篇 |
1987年 | 216篇 |
1986年 | 213篇 |
1985年 | 206篇 |
1984年 | 235篇 |
1983年 | 234篇 |
1982年 | 196篇 |
1981年 | 167篇 |
1980年 | 167篇 |
1979年 | 195篇 |
1978年 | 167篇 |
1977年 | 134篇 |
1976年 | 127篇 |
1975年 | 117篇 |
1974年 | 116篇 |
1973年 | 102篇 |
1971年 | 74篇 |
排序方式: 共有10000条查询结果,搜索用时 203 毫秒
101.
Lisa R. Larson M.S.W. 《Clinical Social Work Journal》1993,21(2):137-150
Betrayal by a significant object is seen as primary in causing behavioral and emotional disturbances in incest victims, leading to a pervasive identification with the aggressor and disturbances in object relations development. Identification with the aggressor is understood not as a uniform defense mobilized against a specific affect but as a complex compromise formation which defends against anxiety, while also providing libidinal, aggressive and superego gratifications. Far from simply attempting to overcome the past, identifications thus preserve affects that have become pleasurable and self-defining. Two case studies of adolescent girls illustrate how treatment can help victims recognize and begin to forego the sadomasochistic pleasure derived from these identifications, a relinquishment necessary for true mastery. 相似文献
102.
William S. Pease 《Risk analysis》1992,12(2):253-265
The extent of carcinogen regulation under existing U.S. environmental statutes is assessed by developing measures of the scope and stringency of regulation. While concern about cancer risk has played an important political role in obtaining support for pollution control programs, it has not provided the predominant rationale for most regulatory actions taken to date. Less than 20% of all standards established to limit concentrations of chemicals in various media address carcinogens. Restrictions on chemical use are more frequently based on concerns about noncancer human health or ecological effects. Of the chemicals in commercial use which have been identified as potential human carcinogens on the basis of rodent bioassays, only a small proportion are regulated. There is an inverse relationship between the scope of regulatory coverage and the stringency of regulatory requirements: the largest percentages of identified carcinogens are affected by the least stringent requirements, such as information disclosure. Standards based on de minimis cancer risk levels have been established for only 10% of identified carcinogens and are restricted to one medium: water. Complete bans on use have affected very few chemicals. The general role that carcinogenicity now plays in the regulatory process is not dramatically different from that of other adverse human health effects: if a substance is identified as a hazard, it may eventually be subject to economically achievable and technically feasible restrictions. 相似文献
103.
104.
Mining the Data: Analyzing the Economic Implications of Mining for Nonmetropolitan Regions 总被引:1,自引:0,他引:1
Extractive industries such as logging and mining are generally expected to bring significant economic benefits to rural regions, but a growing number of findings have now challenged that common expectation. Still, it is not clear whether the findings of less–than–desirable economic outcomes are isolated or representative. In this article, we assemble literally all of the relevant quantitative findings on mining that we have been able to identify in published and/or technical literature from the United States. In the interest of rigor, we limit the assessment to cases in which strictly nonmetropolitan mining regions are compared against other nonmetropolitan regions and/or against those regions’ own experiences over time. Overall, 301 findings meet the criteria for inclusion. Contrary to the long–established assumptions, but consistent with more recent critiques, roughly half of all published findings indicate negative economic outcomes in mining communities, with the remaining findings being split roughly evenly between favorable and neutral/indeterminate ones. Positive findings are more likely to be associated with incomes than with poverty or (especially) unemployment rates, and they are more likely to come from the western United States, where much of the mining involves relatively large, new coal strip mines. Over half of all positive findings come from the years prior to 1982. In virtually all other categories, the plurality or majority of findings have been negative. When the patterns of findings are subjected to one–sample means tests, the only way to produce a significantly positive outcome is by combining all neutral/indeterminate findings with the positive ones, while focusing exclusively on incomes; by contrast, in the case of poverty or unemployment rates—as well as for the overall body of findings—the results are consistently and significantly negative, whether the neutral/indeterminate findings are combined with negative ones or omitted from the equations altogether. Until or unless future studies produce dramatically different findings, there appears to be no scientific basis for accepting the widespread, “obvious” assumption that mining will lead to economic improvement. 相似文献
105.
Developing a fair and widely accepted income definition presents one of the greatest challenges to tax reform. To arrive at a definition separate from the federal tax code, we surveyed 1200 Latter‐day Saints about their practice of tithing. Tithing is similar to a flat tax with no deductions, where individuals voluntarily contribute 10% of self‐defined income to the church. The results of our survey indicate that most respondents operate on a cash realization basis, which excludes savings and does not allow any deductions. Respondents' income concepts generally do not coincide with current tax laws or economists' views of comprehensive income. 相似文献
106.
107.
该文在查阅古文献的基础上 ,对我国古代在城市水资源合理利用与开发的同时 ,如何与改善人居环境、城市景观相结合进行了分析研究。古人的这种做法对于如何改善我国目前日益恶劣的城市生态环境以及如何使人居环境工程建设与城市景观建设密切结合 ,给予了很好的启示作用 相似文献
108.
满昌慧 《北京林业大学学报(社会科学版)》2002,(Z1)
本文通过对我国 45名优秀女子背越式跳高运动员力量训练手段进行分析研究 ,找出影响专项成绩的关键因素 ,为检查评定运动员的力量训练水平提供准确、易行的检查性项目。通过R型因子分析和逐步回归分析 ,得到各项检查性指标与运动成绩的数学模型 ,制定出评定运动员力量训练水平的评定标准和评定方法 ,从而给教练员提供了评价力量训练水平的量化标准 相似文献
109.
邵玉铮 《北京林业大学学报(社会科学版)》2003,2(4):73-76
该文依据分类学的原则 ,剖析了沿用一千多年的“永字八法” ,减撇加折 ,构成了“新永字八法”。同时推出了“方圆米格” ,不仅适用于楷书 ,也可传习行、草、隶、篆诸种书体。改进后的“大小多用方圆米格” ,既可写大小多种字体 ,又能提高利用率。 相似文献
110.
William G. Herron Rafael Art Javier Maura McDonald-Gomez Lydia K. Adlerstein 《Journal of Social Distress and the Homeless》1994,3(3):213-228
This paper suggests a direction for the exploration of the causes of family violence. Explanatory models of family violence were considered in this regard, with the recommendation that a multi-determined model should be considered to ensure the most accurate explanation. We suggest that family violence will be best understood and prevented or alleviated, if a model is used that considers the interaction of structural violence and the personality features of all the family members. 相似文献