全文获取类型
收费全文 | 18563篇 |
免费 | 552篇 |
专业分类
各国政治 | 822篇 |
工人农民 | 758篇 |
世界政治 | 1192篇 |
外交国际关系 | 542篇 |
法律 | 11615篇 |
中国共产党 | 3篇 |
中国政治 | 119篇 |
政治理论 | 3903篇 |
综合类 | 161篇 |
出版年
2020年 | 197篇 |
2019年 | 290篇 |
2018年 | 378篇 |
2017年 | 426篇 |
2016年 | 417篇 |
2015年 | 303篇 |
2014年 | 325篇 |
2013年 | 1867篇 |
2012年 | 432篇 |
2011年 | 474篇 |
2010年 | 389篇 |
2009年 | 453篇 |
2008年 | 506篇 |
2007年 | 470篇 |
2006年 | 500篇 |
2005年 | 452篇 |
2004年 | 450篇 |
2003年 | 431篇 |
2002年 | 432篇 |
2001年 | 654篇 |
2000年 | 597篇 |
1999年 | 447篇 |
1998年 | 267篇 |
1997年 | 236篇 |
1996年 | 243篇 |
1995年 | 227篇 |
1994年 | 220篇 |
1993年 | 232篇 |
1992年 | 384篇 |
1991年 | 418篇 |
1990年 | 395篇 |
1989年 | 400篇 |
1988年 | 369篇 |
1987年 | 377篇 |
1986年 | 415篇 |
1985年 | 397篇 |
1984年 | 370篇 |
1983年 | 354篇 |
1982年 | 238篇 |
1981年 | 215篇 |
1980年 | 185篇 |
1979年 | 246篇 |
1978年 | 158篇 |
1977年 | 173篇 |
1976年 | 150篇 |
1975年 | 122篇 |
1974年 | 149篇 |
1973年 | 151篇 |
1972年 | 135篇 |
1969年 | 104篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
161.
Effects of positional restraint on oxygen saturation and heart rate following exercise 总被引:1,自引:0,他引:1
D T Reay J D Howard C L Fligner R J Ward 《The American journal of forensic medicine and pathology》1988,9(1):16-18
This report assesses the effects on peripheral oxygen saturation and heart rate that positional restraint induces when a person is prone, handcuffed, and "hog-tied." Peripheral oxygen saturation and heart rate were monitored at rest, during exercise, and during recovery from exercise for 10 adult subjects. The effects of positional restraint produced a mean recovery time that was significantly prolonged. Consequently, the physiological effects produced by positional restraint should be recognized in deaths where such measures are used. 相似文献
162.
163.
Schneider CE 《California law review》1988,76(1):151-176
164.
Northern Ireland is a bicommunal society in which Protestantsare numerically dominant; Roman Catholics constitute virtuallyall of the remaining population. On the island as a whole, Protestantsare heavily outnumbered; the Republic of Ireland (the "South")has a population that is about 96 percent Catholic. Social segregationof the two northern communities is relatively distinct, andthere is little crosscutting between groups that might lessenbicommunal conflict. A reciprocal relationship exists betweenthe social system and political structures. Northern Irish politicalinstitutions followed the Westminster model, which facilitatedthe political exclusion of Catholics and impeded social as wellas political integration. The bicommunal social structure hasimpeded the development of more accommodating political structures.Geographic issues and external linkages compound the politicalproblem. Northern Irish politics can be viewed as a "dual dyad"in which the United Kingdom and the Republic of Ireland arecritical components. Psychological dimensions of Northern Irishbicommunalism further exacerbate the conflict. 相似文献
165.
While the holdings in Davidowitz and Arkansas Blue Cross & Blue Shield arose in different contexts, they both reflect the courts' increasing willingness to consider the importance of cost containment in the health insurance arena, even though patient accessibility to health care may be restricted as a result. If the holding in Davidowitz is not successfully appealed, providers may need legislative relief in order to retain their ability to take valid assignments of patient claims for payment from ERISA plans. It is uncertain whether such legislation can be sought at the state level or must instead come from Congress due to ERISA preemption of state legislation. Clearly, the district court decision on remand in Arkansas Blue Cross & Blue Shield will be closely watched for any light it may shed on this question. On a pragmatic note, providers who have not entered into "participation" agreements with insurers or other private payors may now have a greater incentive to do so, and "nonparticipating" providers who continue to obtain assignments from patients in order to collect directly from insurers or other private payors should determine on a case-by-case basis whether the source of the patient's benefits is a group health plan--which is likely to fall under ERISA and may contain nonassignment provisions--or some other form of coverage. For an additional perspective on insurers' responses to copayment waivers, see Newsletter, Vol. 6, No. 10, October 1991, at 7. 相似文献
166.
167.
168.
Lobbyists, entrenched forces in congress and self-interested friends will try to stymie Clinton's efforts. A look at four key arenas of combat. 相似文献
169.
170.