全文获取类型
收费全文 | 11200篇 |
免费 | 368篇 |
专业分类
各国政治 | 384篇 |
工人农民 | 546篇 |
世界政治 | 752篇 |
外交国际关系 | 388篇 |
法律 | 7082篇 |
中国共产党 | 34篇 |
中国政治 | 127篇 |
政治理论 | 2119篇 |
综合类 | 136篇 |
出版年
2023年 | 58篇 |
2021年 | 88篇 |
2020年 | 189篇 |
2019年 | 173篇 |
2018年 | 276篇 |
2017年 | 306篇 |
2016年 | 336篇 |
2015年 | 261篇 |
2014年 | 279篇 |
2013年 | 1004篇 |
2012年 | 285篇 |
2011年 | 318篇 |
2010年 | 236篇 |
2009年 | 298篇 |
2008年 | 364篇 |
2007年 | 373篇 |
2006年 | 361篇 |
2005年 | 327篇 |
2004年 | 325篇 |
2003年 | 270篇 |
2002年 | 255篇 |
2001年 | 368篇 |
2000年 | 353篇 |
1999年 | 266篇 |
1998年 | 161篇 |
1997年 | 116篇 |
1996年 | 145篇 |
1995年 | 119篇 |
1994年 | 142篇 |
1993年 | 135篇 |
1992年 | 203篇 |
1991年 | 256篇 |
1990年 | 216篇 |
1989年 | 199篇 |
1988年 | 226篇 |
1987年 | 203篇 |
1986年 | 222篇 |
1985年 | 194篇 |
1984年 | 165篇 |
1983年 | 159篇 |
1982年 | 104篇 |
1981年 | 122篇 |
1980年 | 104篇 |
1979年 | 108篇 |
1978年 | 92篇 |
1977年 | 79篇 |
1976年 | 64篇 |
1975年 | 64篇 |
1974年 | 65篇 |
1973年 | 82篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
102.
In the three years since the Americans with Disabilities Act (ADA) was enacted, significant developments have occurred in the form of new administrative and judicial interpretations of the Act. The new guidelines and decisions will assist employers in complying with the ambiguous, and sometimes confusing, provisions of the ADA. Recent developments in areas such as the definition of a disability and the permissibility of medical inquiries, along with continuing developments in the areas of mental disabilities and defining reasonable accommodations, give employers insight into the obligations created by the ADA. These developments are a good starting point to understanding the ADA, but there is still a long way to go. This article surveys the recent developments in the law and examines the considerations that have become important to the Equal Employment Opportunity Commission and the courts in interpreting the ADA's provisions. 相似文献
103.
104.
105.
106.
107.
108.
109.
110.
In Hannover/Germany in 1976 a so called "Society for Regenerative Hyperbaric Therapy" (Gesellschaft für Regenerative Uberdruck-Therapie) subjected 20 patients within two coupled multi-place chambers to a simulated hyperbaric environment, equivalent to a maximum of 4 ata, followed usually by gradual reductions of the pressure. The patients were of an average age of 67.2 years and were afflicted by various disorders. During one of the "dives" a patient developed air embolism of the central nervous system. During ensuing confusion of the chamber was opened suddenly, with resultant explosive reduction of the high pressure. This resulted in five letal accidents of decompression sickness. Post mortem examination revealed diffuse distribution of gas bubbles throughout the entire body. By elecronmicroscopy each bubble was covered by an osmiophilic coat. Post mortem findings are discussed and correlated with well-known and new clinical symptomes. These observations present for the first time fatal accidents of decompression sickness in humans, associated with hyperbaric air-therapy. 相似文献