全文获取类型
收费全文 | 28063篇 |
免费 | 290篇 |
专业分类
各国政治 | 1038篇 |
工人农民 | 1088篇 |
世界政治 | 1972篇 |
外交国际关系 | 1193篇 |
法律 | 16891篇 |
中国共产党 | 17篇 |
中国政治 | 374篇 |
政治理论 | 5281篇 |
综合类 | 499篇 |
出版年
2021年 | 167篇 |
2020年 | 519篇 |
2019年 | 596篇 |
2018年 | 647篇 |
2017年 | 670篇 |
2016年 | 754篇 |
2015年 | 622篇 |
2014年 | 643篇 |
2013年 | 2627篇 |
2012年 | 750篇 |
2011年 | 732篇 |
2010年 | 827篇 |
2009年 | 820篇 |
2008年 | 804篇 |
2007年 | 718篇 |
2006年 | 765篇 |
2005年 | 622篇 |
2004年 | 620篇 |
2003年 | 677篇 |
2002年 | 642篇 |
2001年 | 914篇 |
2000年 | 789篇 |
1999年 | 717篇 |
1998年 | 403篇 |
1997年 | 352篇 |
1996年 | 309篇 |
1995年 | 308篇 |
1994年 | 354篇 |
1993年 | 329篇 |
1992年 | 459篇 |
1991年 | 526篇 |
1990年 | 477篇 |
1989年 | 504篇 |
1988年 | 448篇 |
1987年 | 482篇 |
1986年 | 489篇 |
1985年 | 481篇 |
1984年 | 419篇 |
1983年 | 439篇 |
1982年 | 353篇 |
1981年 | 336篇 |
1980年 | 261篇 |
1979年 | 329篇 |
1978年 | 239篇 |
1977年 | 205篇 |
1976年 | 200篇 |
1975年 | 183篇 |
1974年 | 212篇 |
1973年 | 185篇 |
1972年 | 154篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
41.
The concentration of thyreoglobulin (tg) was determined for death caused by hanging, strangulation by ligature, and throttling. Cases of sudden death (traumatic aortic rupture, penetrating wounds of the heart) were used for comparison. The mean values in cases of hanging (149.9±202.3 ng/ml), strangulation by ligature (193.1±173.3), manual strangulation (561.6±173.9) are distinguishable from violent acute deaths (23.3±27.6) and living healthy individuals (17.3±16.1). By means of statistical comparisons, significant differences were found between throttling and strangulation by ligature and between throttling and hanging (adjusted P<0.001). In connection with examination of the bodies high tg values can be regarded as a vital reaction in obstructive asphyxia. 相似文献
42.
Threatening and otherwise inappropriate letters to members of the United States Congress 总被引:2,自引:0,他引:2
P E Dietz D B Matthews D A Martell T M Stewart D R Hrouda J Warren 《Journal of forensic sciences》1991,36(5):1445-1468
The authors examine the characteristics of threatening and otherwise inappropriate communications sent to members of the U.S. Congress by a sample of 86 subjects, 20 of whom threatened assassination. We quote excerpts from these letters and provide quantitative data on such variables as the volume, duration, form, and appearance of such communications; the enclosures; the subjects' perceived relationships to the recipients; the thematic content of the communications; and the messages and threats communicated. Comparisons between 43 subjects who pursued encounters with members of Congress and 43 who did not revealed 17 factors associated with such pursuit. In this population, threateners were significantly less likely to pursue an encounter than inappropriate letter writers who did not threaten, regardless of the type of threat or the harm threatened. Inappropriate letters to members of Congress are compared with those directed to Hollywood celebrities. Mentally disordered persons writing to public figures often mention and sometimes threaten public figures other than those to whom the letters are addressed, which raises important issues regarding notification of endangered third parties and the sharing of information among protective agencies. 相似文献
43.
R. CHRISTOPHER SPICER CIH CHMM HARRY J. GANGLOFF PH.D. Neil Feldscher CIH CSP 《环境索赔杂志》2005,17(1):13-28
Bioaerosol data is often used in cases of building mold infestation alleging damage or adverse health effects upon occupants, despite the lack of consistent sampling and analytical protocols and numerical health-based standards. The most fundamental problem in these scenarios is defining a “significant” difference between a suspect indoor environment and the reference environment, regardless of the type of sampling and analysis utilized. Data interpretation focused upon differences in absolute numerical concentrations of fungi is subject to wide differences in expert opinion. On the other hand, an objective quantification of differences can be expressed in terms of probability and better meets criteria established in evidentiary rules. 相似文献
44.
Washington University v. Catalona revolves around ownership of tissue samples provided by patients for research purposes, raising significant ethical and legal questions concerning patient rights, current human research practices, and the treatment of samples as capital resources by the research institution. 相似文献
45.
46.
47.
48.
49.
Germ-line Gene Therapy: A New Stage of Debate 总被引:1,自引:0,他引:1
50.
Eight homicidal youths were assessed for language disorders and psychiatric diagnoses using a battery of standardized language tests and the Diagnostic Interview for Children and Adolescents. Both language disorders and Diagnostic and Statistical Manual III-R psychiatric diagnoses were present in all subjects. 相似文献