全文获取类型
收费全文 | 11297篇 |
免费 | 624篇 |
专业分类
各国政治 | 474篇 |
工人农民 | 378篇 |
世界政治 | 886篇 |
外交国际关系 | 379篇 |
法律 | 7452篇 |
中国共产党 | 1篇 |
中国政治 | 60篇 |
政治理论 | 2241篇 |
综合类 | 50篇 |
出版年
2021年 | 62篇 |
2020年 | 203篇 |
2019年 | 248篇 |
2018年 | 252篇 |
2017年 | 321篇 |
2016年 | 318篇 |
2015年 | 257篇 |
2014年 | 283篇 |
2013年 | 1135篇 |
2012年 | 252篇 |
2011年 | 326篇 |
2010年 | 308篇 |
2009年 | 328篇 |
2008年 | 309篇 |
2007年 | 284篇 |
2006年 | 303篇 |
2005年 | 279篇 |
2004年 | 274篇 |
2003年 | 258篇 |
2002年 | 261篇 |
2001年 | 483篇 |
2000年 | 432篇 |
1999年 | 314篇 |
1998年 | 203篇 |
1997年 | 159篇 |
1996年 | 139篇 |
1995年 | 128篇 |
1994年 | 158篇 |
1993年 | 142篇 |
1992年 | 219篇 |
1991年 | 232篇 |
1990年 | 214篇 |
1989年 | 220篇 |
1988年 | 221篇 |
1987年 | 203篇 |
1986年 | 253篇 |
1985年 | 220篇 |
1984年 | 167篇 |
1983年 | 176篇 |
1982年 | 125篇 |
1981年 | 126篇 |
1980年 | 91篇 |
1979年 | 142篇 |
1978年 | 79篇 |
1977年 | 82篇 |
1976年 | 73篇 |
1974年 | 77篇 |
1973年 | 69篇 |
1972年 | 66篇 |
1970年 | 47篇 |
排序方式: 共有10000条查询结果,搜索用时 13 毫秒
881.
When the anterior thoracic wall is within the hypostatic area, postmortem lividity in the region of the nipples and their immediate vicinity is less intense or absent. Where hypostatic skin haemorrhages (so-called vibices) are present, these are also found outside the areola of the nipple only. This phenomenon is visible not only externally, but is particularly pronounced on the cut surface. A possible explanation may be the different distribution pattern of connective tissue, smooth muscles and blood vessels inside and outside the areola mammae. Based on 13 cases from the forensic autopsy material--mostly drug related deaths--the macromorphological findings and their histological correlates are presented. 相似文献
882.
The authors tested whether use of an electro shock weapon (stun gun) leaves marks on skin which can be found in an exterior examination. On pig skin such marks could not be produced postmortally. An experiment on one of the authors caused reddish skin marks which persisted for about 2 h. Inability to act as promised by the weapons' manufacturers did not occur in our experiments, exactly as previously described by other authors. Use of an air tester which shoots barbed electrodes ought to produce bleedings if the electrodes actually penetrate the skin. 相似文献
883.
884.
Scheutzow SO 《Journal of health law》2001,34(1):21-45
The Anti-Referral laws are omnipresent in the practice of health law. Perhaps as a result of their wide scope in application, those laws have had a number of unintended consequences. This Article closely examines one aspect of those laws: the exception applicable to otherwise forbidden conduct that takes place between employer and employee. The author concludes that this exception does nothing to advance the policy of the laws, has led to much confusion, and has had the unintended consequence of accelerating the business consolidation of physicians with each other and with clinics and hospitals. Consequently, she asserts that this exception should be repealed. 相似文献
885.
Himes SM 《Journal of health law》2001,34(3):335-376
This Article analyzes potential conflicts that arise from both the judicial and administrative approval processes that govern the closure of charitable hospitals through a sale of all or substantially all of their assets. Examining the recent closure attempt by the Manhattan Eye, Ear & Throat Hospital as an example, the Article highlights the various public health and corporate law issues that are raised when a not-for-profit hospital seeks closure. The Article thoroughly discusses both the statutorily and judicially required approval schemes applicable to the closure of charitable hospitals. The Article also suggests ways in which these conflicts might be avoided or remedied, as well as gives advice regarding hospital board decisionmaking. 相似文献
886.
887.
The heterozygous condition characterized by the presence of hemoglobin AS (sickle-cell trait) occurs in approximately 8% of the American black population. Unlike the homozygous state (sickle-cell disease), sickle-cell trait is not widely recognized as a cause of life-threatening illness or death despite over 30 case reports describing fatal or serious complications of exercise in young black males with this condition. These reports identify heat stress, dehydration, viral illness, and poor physical conditioning as factors which may contribute to exertional rhabdomyolysis and sudden death, suggesting multifactorial etiology. However, since sickling is known to occur postmortem, it remains controversial as to whether the pathogenesis of these exercise related deaths involves microvascular obstruction by sickled erythrocytes. We describe three young black individuals with no significant past medical history who died following physical exertion. In all three cases, postmortem hemoglobin electrophoresis demonstrated hemoglobin AS. In none of the cases was the body temperature found to be elevated. These cases serve to remind the forensic community that, in the proper setting, sickle-cell trait must be viewed as a potentially fatal disorder. 相似文献
888.
889.
This study examined the psychological characteristics of a sample of self-reported stalkers in comparison with a control group, on measures of empathy, problem-solving skills, attachment, and borderline personality features. Stalkers were identified by their endorsement of specific behavioral items, consistent with a widely adopted definition of stalking, denoting behaviors that: (a) are repeatedly directed toward an identified target; (b) are intrusive and unwanted; and (c) evoke fear in the victim. Stalkers scored significantly higher than controls on measures of insecure attachment and borderline personality features, suggesting that the stalking group demonstrates a general pattern of inadequate interpersonal attachment, has limited abilities to form and maintain appropriate relationships, is emotionally labile and unstable, and experiences ambivalence regarding their interpersonal relationships. Treatment implications are discussed herein. 相似文献
890.
Lewis LA Smithwick RW Devault GL Bolinger B Lewis SA 《Journal of forensic sciences》2001,46(2):241-246
Chemical processes involved in the development of latent fingerprints using the cyanoacrylate fuming method have been studied. Two major types of latent prints have been investigated-clean and oily prints. Scanning electron microscopy (SEM) has been used as a tool for determining the morphology of the polymer developed separately on clean and oily prints after cyanoacrylate fuming. A correlation between the chemical composition of an aged latent fingerprint, prior to development, and the quality of a developed fingerprint has been observed in the morphology. The moisture in the print prior to fuming has been found to be more important than the moisture in the air during fuming for the development of a useful latent print. In addition, the amount of time required to develop a high quality latent print has been found to be within 2 min. The cyanoacrylate polymerization process is extremely rapid. When heat is used to accelerate the fuming process, typically a period of 2 min is required to develop the print. The optimum development time depends upon the concentration of cyanoacrylate vapors within the enclosure. 相似文献