全文获取类型
收费全文 | 17616篇 |
免费 | 1167篇 |
专业分类
各国政治 | 716篇 |
工人农民 | 855篇 |
世界政治 | 1152篇 |
外交国际关系 | 539篇 |
法律 | 12292篇 |
中国共产党 | 2篇 |
中国政治 | 109篇 |
政治理论 | 3026篇 |
综合类 | 92篇 |
出版年
2021年 | 87篇 |
2020年 | 430篇 |
2019年 | 450篇 |
2018年 | 566篇 |
2017年 | 581篇 |
2016年 | 664篇 |
2015年 | 508篇 |
2014年 | 536篇 |
2013年 | 1817篇 |
2012年 | 482篇 |
2011年 | 505篇 |
2010年 | 534篇 |
2009年 | 559篇 |
2008年 | 519篇 |
2007年 | 504篇 |
2006年 | 521篇 |
2005年 | 441篇 |
2004年 | 439篇 |
2003年 | 359篇 |
2002年 | 410篇 |
2001年 | 680篇 |
2000年 | 613篇 |
1999年 | 485篇 |
1998年 | 240篇 |
1997年 | 175篇 |
1996年 | 198篇 |
1995年 | 197篇 |
1994年 | 170篇 |
1993年 | 180篇 |
1992年 | 309篇 |
1991年 | 314篇 |
1990年 | 300篇 |
1989年 | 280篇 |
1988年 | 308篇 |
1987年 | 268篇 |
1986年 | 324篇 |
1985年 | 319篇 |
1984年 | 256篇 |
1983年 | 231篇 |
1982年 | 183篇 |
1981年 | 158篇 |
1980年 | 145篇 |
1979年 | 225篇 |
1978年 | 117篇 |
1977年 | 94篇 |
1976年 | 76篇 |
1975年 | 96篇 |
1974年 | 125篇 |
1973年 | 79篇 |
1972年 | 79篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
The index of lethal poisoning with ethyl alcohol and its surrogates in Russia remains one of the highest in the world. It is explained by high alcohol consumption in Russia (about 15 liters of pure alcohol per capita annually), consumption of mainly strong beverages (about 80%), extensive sales of adulterated strong alcoholic beverages (more than 25%), virtually no preventive work in the population, and other causes. The index of lethal poisoning with alcohol and its surrogates in the country and its regions is one of the most important parameters in evaluation of the socioeconomic well-being of the population. 相似文献
992.
This study describes the characteristics of modacrylic fibres and includes over 80 samples (previous and current) representing 15 trade names. Fibre morphology was examined using brightfield microscopy. Signs of elongation were determined using polarised light microscopy. Fibre cross sections were also examined. The generic class of fibre was divided into sub groups using polymer composition as determined by FTIR-microscopy. Microscopically, some modacrylic fibres cannot be distinguished from acrylic fibres. Others display unusual optical and morphological features which are a strong indication of their generic class. The infrared spectra provide information about the co-monomer, termonomers added to produced dye sites, the presence of solvent residue, dyes, and additives, e.g. flame retardant material. The infrared spectra should always be recorded before and after any thin layer chromatographic examination of the dye, otherwise peaks attributable to dyes, which may be a valuable comparative feature in casework will be lost. 相似文献
993.
O'Byrne ME 《Journal of law and health》1999,14(1):45-86
This paper examines the legal and strategic issues raised by the use of information systems in health maintenance organizations (HMOs) and other managed care organizations. Given the critical nature of information systems to an HMO's business success and regulatory compliance, the large financial investment HMOs make in their systems, and the widely publicized concerns over the year 2000 "millennium bug" problem, information systems are appropriately a matter of concern to an HMO's board of directors. The recent experience of Oxford Health Plans, Inc. offers a case study in the apparent failure of the directors to monitor adequately the in-house development of an information system. The systems disaster which this corporation suffered in 1997 led to a dramatic drop in stock price, from which the company has yet to recover, as well as intense scrutiny by state and federal regulators and countless shareholder derivative actions against the directors. Corporate directors are subject to the fiduciary duty of care. Despite statutes in some states requiring directors to act prudently, state courts almost always apply the standard of gross negligence. As a result, even when directors act without due deliberation in their decision, it is rare that a court will find them to have failed in their duty of care. The business and regulatory community may find otherwise, however, when directors fail to evaluate information systems options carefully and the business suffers as a result. 相似文献
994.
995.
996.
997.
M. Kay Jankowski Harold Leitenberg Kris Henning Patricia Coffey 《Journal of family violence》1999,14(3):267-279
The present study examined the association between witnessing interparental violence as a child, and the risk for perpetrating and being the victim of dating aggression as an adult, in an undergraduate sample. Specifically, this study tested a modeling hypothesis whereby witnessing a same sex parent vs. an opposite sex parent exclusively in the aggressor role would be more highly associated with risk for perpetrating dating aggression. Similarly, observing a same sex parent vs. an opposite sex parent as exclusively a victim of marital aggression would be associated with risk for being a victim of dating aggression. A same sex modeling effect was found for perpetration of dating aggression. Respondents who witnessed only their same sex parent perpetrate physical marital aggression were at increased risk for perpetrating physical dating aggression, whereas respondents who witnessed only their opposite sex parent perpetrate were not. A same sex modeling effect, however, was not found for being a victim of dating aggression. Rather, risk for victimization by dating aggression was associated only with witnessing bidirectional marital violence. Implications of these results, limitations of the present study, and ideas for future research are discussed. 相似文献
998.
999.
1000.
Shapiro MH 《Wake Forest law review》1999,34(3):561-637
There apparently is a genuine possibility that genetic and non-genetic mechanisms eventually will be able to significantly enhance human capabilities and traits generally. Examining this prospect from the standpoint of equality considerations is one useful way to inquire into the effects of such enhancement technologies. Because of the nature and limitations of competing ideas of equality, we are inevitably led to investigate a very broad range of issues. This Article considers matters of distribution and withholding of scarce enhancement resources and links different versions of equality to different modes of distribution. It briefly addresses the difficulties of defining "enhancement" and "trait" and links the idea of a "merit attribute" to that of a "resource attractor." The role of disorder-based justifications is related to equality considerations, as is the possibility of the reduction or "objectification" of persons arising from the use of enhancement resources. Risks of intensified and more entrenched forms of social stratification are outlined. The Article also considers whether the notion of merit can survive, and whether the stability of democratic institutions based on a one-person, one-vote standard is threatened by attitude shifts given the new technological prospects. It refers to John Stuart Mill's "plural voting" proposal to illustrate one challenge to equal-vote democracy. 相似文献