首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   72677篇
  免费   3303篇
  国内免费   5篇
各国政治   4574篇
工人农民   3007篇
世界政治   6208篇
外交国际关系   3932篇
法律   35373篇
中国共产党   15篇
中国政治   805篇
政治理论   21112篇
综合类   959篇
  2021年   428篇
  2020年   1179篇
  2019年   1559篇
  2018年   1751篇
  2017年   2043篇
  2016年   2239篇
  2015年   1859篇
  2014年   2146篇
  2013年   10708篇
  2012年   1753篇
  2011年   1893篇
  2010年   1903篇
  2009年   2133篇
  2008年   1928篇
  2007年   1943篇
  2006年   2064篇
  2005年   1953篇
  2004年   1847篇
  2003年   1686篇
  2002年   1696篇
  2001年   1806篇
  2000年   1538篇
  1999年   1384篇
  1998年   1164篇
  1997年   994篇
  1996年   981篇
  1995年   945篇
  1994年   956篇
  1993年   980篇
  1992年   1058篇
  1991年   1103篇
  1990年   1042篇
  1989年   1057篇
  1988年   1068篇
  1987年   1043篇
  1986年   1051篇
  1985年   1107篇
  1984年   982篇
  1983年   1029篇
  1982年   912篇
  1981年   872篇
  1980年   678篇
  1979年   721篇
  1978年   619篇
  1977年   548篇
  1976年   500篇
  1975年   454篇
  1974年   465篇
  1973年   449篇
  1972年   393篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
941.
The American health care system appears to suffer from higher costs and less access than the health care systems of other industrialized nations. This perception has set social scientists searching for "lessons from abroad." This paper places the dialogue about health system lessons within the context of American political culture. It sketches out some of the distinctive dynamics in the American policymaking process. Those dynamics help explain the problems we face, the programs we have pursued, and the alternatives we have foregone. The same political process which shaped past policies is likely to frame any lessons we try to import from abroad.  相似文献   
942.
The case of the death by arsenic poisoning of a 62-year-old white man is presented. One year prior to death, he developed intermittent bouts of severe gastroenteritis with vomiting and diarrhea, hyperpigmentation and keratosis of the skin, neutropenia, and Guillain-Barré-like neuropathy for which he was hospitalized several times. Urine test results 6 months prior to death indicating 36 mg/L arsenic were believed to be in error. At the patient's last admission, he appeared in the emergency room with severe gastroenteritis, hypotension, and dehydration. He died 3 days later. Antemortem as well as autopsy specimens revealed elevated arsenic concentrations. Arsenic micrograms/g analysis by neutron activation of hair pulled from the man's head revealed by centimeter segmental analysis proximal to distal: 226, 104, 28, 56, 41, 40, and 74. The wife of the decedent was charged with murder by arsenic poisoning of this, her fifth, husband. The defense alleged that the decedent had committed suicide. The judge awarded a directed verdict of "not guilty." Particulars of the medical, toxicological, and investigative findings are presented.  相似文献   
943.
944.
945.
946.
In the summer of 1984, police in Pinellas County, Florida, confiscated six identically colored imported Asian skulls (in a shipping case) from a private citizen. In May 1988, in nearby Hillsborough County, police confiscated a very similar skull from another private citizen, who allegedly had found it in an abandoned house. Aside from slight color differences between the six found in Pinellas County and the one found in Hillsborough County, the skulls are virtually identical in their osteological characteristics and condition and in the vital statistics derived from each. Each skull is as clean and dry as those typically sold by commercial scientific supply outlets in the United States. Each is edentulous (primarily premortem), between approximately 20 and 60 years of age at death, and morphologically Asian. Five of the seven are morphologically male, one is morphologically female, and one is a mosaic with respect to gender-related features. Police, medical examiners, coroners, and forensic anthropologists should be aware of such "souvenir" specimens, in the event that they encounter similar skulls. Discriminant function analyses for race and sex yield considerably conflicting results, which underscores the need for using extreme caution when interpreting forensic science estimates based on such techniques.  相似文献   
947.
The authors developed a method of malathion insecticide determination in the cadaveric material (blood and wall of the stomach) including extraction of 5 ml of blood (5 g of fragmented tissue of stomach wall) by hexan; preparative chromatographic purification of extract on silicagel layer L 5/40 mkm in hexan-diethyl ether system 10:2; Gas-liquid chromatographic investigation on column with 5% SE-30 and 5% XE-60 (Chromatograph "Colour-106" with thermionic detector). This method makes it possible to detect 72-76% of malathion added.  相似文献   
948.
949.
950.
Certain Biblical passages if interpreted literally can be understood as advocating the use of corporal punishment in disciplining children. The purpose of this research was to determine if persons affiliated with religious denominations which emphasized a literal belief in the Bible would demonstrate less appropriate attitudes with regard to discipline than their counterparts who were affiliated with religious denominations which do not subscribe to a literal interpretation of the Bible. The sample consisted of 881 persons who were members of denominations classified as literal or nonliteral believers. Statistically significant differences were noted on the Physical Punishment Scale of the Adult Adolescent Parenting Inventory with persons, regardless of gender or their level of education, who were members of churches subscribing to a literal belief in the Bible preferring the use of corporal punishment over alternate methods of discipline as compared to their nonliteral counterparts.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号