全文获取类型
收费全文 | 13679篇 |
免费 | 648篇 |
专业分类
各国政治 | 541篇 |
工人农民 | 463篇 |
世界政治 | 1024篇 |
外交国际关系 | 411篇 |
法律 | 9217篇 |
中国共产党 | 1篇 |
中国政治 | 89篇 |
政治理论 | 2528篇 |
综合类 | 53篇 |
出版年
2021年 | 86篇 |
2020年 | 235篇 |
2019年 | 280篇 |
2018年 | 294篇 |
2017年 | 372篇 |
2016年 | 362篇 |
2015年 | 300篇 |
2014年 | 336篇 |
2013年 | 1239篇 |
2012年 | 312篇 |
2011年 | 397篇 |
2010年 | 346篇 |
2009年 | 376篇 |
2008年 | 372篇 |
2007年 | 330篇 |
2006年 | 359篇 |
2005年 | 321篇 |
2004年 | 332篇 |
2003年 | 308篇 |
2002年 | 311篇 |
2001年 | 599篇 |
2000年 | 516篇 |
1999年 | 375篇 |
1998年 | 214篇 |
1997年 | 188篇 |
1996年 | 150篇 |
1995年 | 164篇 |
1994年 | 187篇 |
1993年 | 185篇 |
1992年 | 269篇 |
1991年 | 292篇 |
1990年 | 270篇 |
1989年 | 265篇 |
1988年 | 276篇 |
1987年 | 258篇 |
1986年 | 316篇 |
1985年 | 294篇 |
1984年 | 233篇 |
1983年 | 237篇 |
1982年 | 136篇 |
1981年 | 148篇 |
1980年 | 105篇 |
1979年 | 160篇 |
1978年 | 101篇 |
1977年 | 96篇 |
1976年 | 84篇 |
1974年 | 108篇 |
1973年 | 87篇 |
1972年 | 88篇 |
1970年 | 73篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
941.
U.S. Office of Personnel Management 《Federal register》2005,70(104):31389-31392
The U.S. Office of Personnel Management (OPM) is issuing a final regulation amending the Federal Employees Health Benefits (FEHB) Acquisition Regulation (FEHBAR). This regulation provides additional contract cost principles and procedures for FEHB Program experience-rated contracts and is intended to clarify our requirements and enhance our oversight of FEHB carriers. 相似文献
942.
Kocsis RN Middledorp J Try AC 《International journal of offender therapy and comparative criminology》2005,49(6):662-681
This study undertook an empirically based examination of the cognitive processes associated with the accurate construction of a criminal psychological profile. This was accomplished by comparing the abilities of profilers and nonprofilers in two simulated profiling exercises that measured both profile accuracy and an individual's performance on various tests of memory and comprehension related to the case materials presented in each exercise. The results of these experiments suggest that an incremental relationship exists between comprehension of the case materials and accuracy of the profiles generated. In addition, the findings provide some tentative indications that the comprehension of case material in a narrative (i.e., written) format is an integral cognitive function to proficient profiling. 相似文献
943.
Blumenthal D Weissman JS Wachterman M Weil E Stafford RS Perrin JM Ferris TG Kuhlthau K Kaushal R Iezzoni LI 《Journal of health politics, policy and law》2005,30(3):453-473
Risk adjustment (RA) consists of a series of techniques that account for the health status of patients when predicting or explaining costs of health care for defined populations or for evaluating retrospectively the performance of providers who care for them. Although the federal government seems to have settled on an approach to RA for Medicare Advantage programs, adoption and implementation of RA techniques elsewhere have proceeded much more slowly than was anticipated. This article examines factors affecting the adoption and use of RA outside the Medicare program using case studies in six U.S. health care markets (Baltimore, Seattle, Denver, Cleveland, Phoenix, and Atlanta) as of 2001. We found that for purchasing decisions, RA was used exclusively by public agencies. In the private sector, use of risk adjustment was uncommon and scattered and assumed informal and unexpected forms. The most common private sector use of RA was by health plans, which occasionally employed RA in negotiations with purchasers or to allocate resources internally among providers. The article uses classic technology diffusion theory to explain the adoption and use of RA in these six markets and derives lessons for health policy generally and for the future of RA in particular. For health policy generally, the differing experiences of public and private actors with RA serve as markers of the divergent paths that public and private health care sectors are pursuing with respect to managed care and risk sharing. For the future of RA in particular, its history suggests the need for health service researchers to consider barriers to use adoption and new analytic technologies as they develop them. 相似文献
944.
Carbon monoxide (CO) poisoning as a cause of death is well documented in industrialized countries. The objective of this study was to compare demographic data in deaths due to accidents (in fires) and suicides in the same population between 1988 and 1998. Furthermore, the potential effect of a community wide education effort regarding safety in the home was assessed. Postmortem reports were reviewed for all deaths examined at the Office of the Cuyahoga County Coroner in Cleveland, OH, USA. During the study period, there were 209 accidental deaths due to fires in the home (6.5% of all accidents in the home) and 182 CO deaths by suicide (9.8% of all suicides). Demographic characteristics of the two groups differed: while males represented the majority of cases in both groups (55% of accidents, 70% suicides), race specific death rates were higher for whites than blacks (18/100,000 white, 3/100,000 black) in suicides compared with 29/100,000 deaths for blacks and 11/100,000 for whites in accidental cases. Fire deaths were prevalent in the young (0-9 years) and old (>60) whereas in the suicide group the age specific death rate was highest for those over 70 years. The majority of fire deaths occurred in the city of Cleveland but suicides were prevalent in the suburbs. More fire deaths occurred in December than any other month whereas more suicides occurred in April. In 1992, there was a community wide effort to provide free smoke detectors to residents in Cleveland. In 1992, there were 4.2/100,000 fire deaths in the city. This decreased to 0.6/100,000 in 1996, increased to 1.2/100,000 in 1997 followed by a decrease to 0.8/100,000 in 1998. This suggested that the program may have aided in decreasing these types of deaths. Deaths due to fires in the suburbs were <1/100,000 throughout the study period. 相似文献
945.
The bodies of socially isolated people may remain undiscovered in their own houses for prolonged periods. Occasionally the body is in situ for sufficient time to become skeletonised, or partially so. Medico-legal investigation of these cases is complicated by degradation and contamination of evidence. Thus, a multidisciplinary forensic investigation is recommended. The potential contributions of forensic pathology, anthropology, odontology and entomology are outlined here with reference to two cases that occurred in Victoria, Australia, in 2003. Forensic pathologists are often unable to determine the cause of death in skeletonised bodies, however, they may find evidence to support either a natural or unnatural mode of death, and they may describe skeletal pathology or trauma, and identify skeletal features to support radiological identification of the deceased. Anthropologists can provide supplementary evidence of skeletal trauma. Additionally, they can assess age, sex, stature and racial affiliation from skeletal remains. Odontologists can identify individuals through comparison with ante-mortem dental records; however, potential difficulties exist in identifying the treating dentist of a socially isolated person. Odontologists may also examine the teeth and oro-facial skeleton for trauma. Entomologists may estimate minimum death time and/or season of death. Entomological examination of insect remains may also confirm that a body has lain in situ for a considerable period. 相似文献
946.
L'Abbé EN 《Forensic science international》2005,151(2-3):201-206
In the spring of 2003, bush cutters discovered a large grain bag filled with human skeletal remains in a forest in South Africa. Differential taphonomic processes observed on the bones suggested that the individuals had not died at the same time or had decomposed under different circumstances. The remains were sorted using gross morphological techniques which included assessing the number of skeletal elements present, visual pair matching, articulation, process of elimination and taphonomy. Standard techniques were used to estimate age, sex, racial affinity and stature. A minimum number of individuals (MNI) of 10 was established, which included 7 adult males, 1 adult female and 2 juveniles. Trauma was observed on only one individual. Approximately, 80% of the skeletal remains were missing. These various skeletal elements may have been lost by accident, normal taphonomic processes or taken by scavengers. Possible origins for these skeletal remains include removal from a formal grave, found in the veldt or murdered. 相似文献
947.
S R Sherman 《Social security bulletin》1985,48(7):27-43
Most new retired workers in 1982 owned some type of asset, usually a savings, checking, or credit union account, according to data obtained by the Social Security Administration (SSA) in its New Beneficiary Survey. Many recently retired workers also owned their home, often mortgage-free. Homeownership was their most significant asset in terms of its median value. Comparatively few retirees owned property other than a home, though for owners of such property, the median value was substantial. Married couples, whose assets included those of both partners, more frequently owned assets and their assets had higher median values than did unmarried individuals. A comparison of retired workers with persons aged 65 or older who were enrolled in the Medicare program but who had not yet received retired-worker benefits showed that these Medicare-only enrollees were much better off, both in the likelihood of owning assets and in having higher median values for their assets. Individuals who retired before reaching age 65 and therefore received a reduced social security benefit were not as well off as those whose first benefit was paid at age 65 or older. Overall, the asset situation of new retired workers in 1982 was better than that of men and unmarried women aged 58-63 in 1969, even when the 1969 assets were adjusted to constant 1982 dollars. 相似文献
948.
949.
950.