全文获取类型
收费全文 | 16768篇 |
免费 | 734篇 |
专业分类
各国政治 | 818篇 |
工人农民 | 639篇 |
世界政治 | 1216篇 |
外交国际关系 | 554篇 |
法律 | 10833篇 |
中国共产党 | 1篇 |
中国政治 | 91篇 |
政治理论 | 3262篇 |
综合类 | 88篇 |
出版年
2020年 | 247篇 |
2019年 | 305篇 |
2018年 | 335篇 |
2017年 | 419篇 |
2016年 | 422篇 |
2015年 | 339篇 |
2014年 | 387篇 |
2013年 | 1699篇 |
2012年 | 366篇 |
2011年 | 443篇 |
2010年 | 420篇 |
2009年 | 427篇 |
2008年 | 448篇 |
2007年 | 423篇 |
2006年 | 444篇 |
2005年 | 379篇 |
2004年 | 373篇 |
2003年 | 376篇 |
2002年 | 350篇 |
2001年 | 683篇 |
2000年 | 608篇 |
1999年 | 476篇 |
1998年 | 268篇 |
1997年 | 217篇 |
1996年 | 188篇 |
1995年 | 176篇 |
1994年 | 213篇 |
1993年 | 197篇 |
1992年 | 306篇 |
1991年 | 349篇 |
1990年 | 332篇 |
1989年 | 331篇 |
1988年 | 330篇 |
1987年 | 331篇 |
1986年 | 366篇 |
1985年 | 342篇 |
1984年 | 284篇 |
1983年 | 278篇 |
1982年 | 185篇 |
1981年 | 202篇 |
1980年 | 147篇 |
1979年 | 242篇 |
1978年 | 155篇 |
1977年 | 139篇 |
1976年 | 119篇 |
1975年 | 115篇 |
1974年 | 155篇 |
1973年 | 140篇 |
1972年 | 114篇 |
1971年 | 96篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
971.
972.
AB0 antigens can be extracted from human bone tissue into aqueous solution during boiling and then identified by absorption elution test. 相似文献
973.
974.
975.
Describes the method of comparative analysis of various objects in practical medical criminology and making of high-quality photographs with the use of Adobe Photoshop software. Options of the software needed for expert evaluations are enumerated. 相似文献
976.
977.
Campman SC Holmes JF Sokolove PE Romero JA Yost BA Lie JT 《The American journal of forensic medicine and pathology》2000,21(1):69-73
Arterial fibromuscular dysplasia (FMD) represents a collection of noninflammatory and nonatherosclerotic vascular diseases with a poorly understood etiology. Classically occurring in renal and cerebral arteries, this entity has also been reported in coronary, carotid, and other medium and small arteries. One case occurring in the pulmonary vasculature has been reported. Fatal hemothorax and lung hemorrhage have multiple causes, including other vascular malformations and connective tissue disorders; however, cases of pulmonary FMD are exceedingly rare. We report what appears to be the second such association, occurring in a 69-year-old man. The patient presented with a 3-week history of increasing dyspnea, fatigue, and productive cough; 3 days of increasing back and chest pain; and syncope. Chest radiograph showed a "white-out" of the left lung. The patient died shortly after admission from a fulminant respiratory disease of undetermined etiology. At autopsy he was found to have a massive left hemothorax resulting from an unsuspected pulmonary arterial fibromuscular dysplasia. 相似文献
978.
Mallak CT Milch KS Horn DF 《The American journal of forensic medicine and pathology》2000,21(1):79-82
The diagnosis of sudden infant death syndrome (SIDS) has been an enigma to medical examiners and coroners for decades. The recent drastic decrease in the number of SIDS cases has been associated with infants sleeping supine instead of prone. The apparent relation between sleeping position and SIDS has led to the marketing of several positioning sleep aids. We report a case of the improper use of one such device which resulted in the death of an infant. 相似文献
979.
Byard RW Green H James RA Gilbert JD 《The American journal of forensic medicine and pathology》2000,21(2):101-106
A retrospective analysis of 68 cases of fatal childhood pedestrian accidents in South Australia that occurred over a 20-year period from January 1977 to December 1996 was undertaken. The age range was 12 months to 16 years (average, 7.6 years), with a male to female ratio of 41:27. The most common site of significant injury was the head (91.2%), followed by the abdomen (50%), chest (47.1%), and neck (38.2%). The most frequently encountered significant injury combinations involved the head, chest, and abdomen (14.7%); the head and chest (11.8%); and the head, neck, and abdomen (11.8%). Injuries were severe, consisting of extensive compound and comminuted skull fractures, neck fractures, and massive intraparenchymal brain and internal organ damage with avulsions and fragmentation. Non-life-threatening limb injuries occurred in 88% of cases. A distinct subgroup involved infants and younger children playing in driveways at home who were hit by reversing vehicles. The injuries were often of such a severe nature that death was instantaneous and with no possibility of successful medical intervention. More deaths occurred during the winter than summer months. 相似文献
980.
Distributive and Procedural Justice in Seven Nations 总被引:1,自引:0,他引:1
The paper examines the impact of distributive justice and procedural justice variables on judgments in seven countries (Bulgaria, France, Hungary, Poland, Russia, Spain, and the United States). Subjects were presented with each of two experimental vignettes: one in which the actor unsuccessfully appeals being fired from his job and one in which the actor unsuccessfully goes to an employment agency to seek a job; they were asked to rate the justness of the outcome and how fairly the actor had been treated. The vignettes manipulated deservingness and need of the actor (distributive justice factors) and impartiality and voice in the hearing (procedural justice factors). Four hypotheses were tested: first, a distributive justice hypothesis that deservingness would be more important than need in these settings; second, a procedural justice hypothesis that the importance of voice and impartiality vary depending on the nature of the encounter and the forum in which it is resolved; third, because of their recent socialist experience, Central and Eastern European respondents make greater use of need information and less use of deservingness information than Western respondents; and fourth, that distributive justice and procedural justice factors interact. The distributive justice hypothesis is supported in both vignettes. The procedural justice hypothesis receives some support. Impartiality is more important in the first vignette and voice is more important in the second vignette. The interaction hypothesis was not supported in the first vignette, but does receive some support in the second vignette. The cultural hypothesis is not supported in either vignette. The implications for distributive and procedural justice research are discussed. 相似文献