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   15035篇
  免费   450篇
各国政治   621篇
工人农民   564篇
世界政治   1040篇
外交国际关系   438篇
法律   9346篇
中国共产党   1篇
中国政治   93篇
政治理论   3260篇
综合类   122篇
  2020年   164篇
  2019年   220篇
  2018年   279篇
  2017年   337篇
  2016年   327篇
  2015年   249篇
  2014年   268篇
  2013年   1413篇
  2012年   338篇
  2011年   382篇
  2010年   303篇
  2009年   361篇
  2008年   396篇
  2007年   387篇
  2006年   372篇
  2005年   355篇
  2004年   350篇
  2003年   358篇
  2002年   339篇
  2001年   584篇
  2000年   519篇
  1999年   410篇
  1998年   222篇
  1997年   172篇
  1996年   180篇
  1995年   186篇
  1994年   184篇
  1993年   179篇
  1992年   317篇
  1991年   329篇
  1990年   329篇
  1989年   325篇
  1988年   298篇
  1987年   303篇
  1986年   356篇
  1985年   350篇
  1984年   296篇
  1983年   288篇
  1982年   199篇
  1981年   177篇
  1980年   158篇
  1979年   192篇
  1978年   139篇
  1977年   138篇
  1976年   130篇
  1975年   112篇
  1974年   146篇
  1973年   136篇
  1972年   116篇
  1969年   98篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
211.
212.
213.
214.
215.
The purpose of this study was to examine in a sample of 11,516 secondary school students the extent to which different behavioral, emotional and cognitive problems (a) reflected one or more underlying common factors; (b) actually cooccurred; and (c) were single problems. Principal Component Analyses were performed and percentagewise techniques were used. PCA demonstrated that one or more general syndromes could not by far account for all of the variance of the variables. The results suggest the existence of adolescent subgroups with divergent comorbidity patterns: those who primarily report one single symptom; those who report concurrent symptoms either exclusively in the category of behavioral problems or exclusively in the category of emotional and cognitive problems; and those who report concurrent symptoms in both categories. This distinction between different subgroups has important theoretical, diagnostic, and treatment implications.  相似文献   
216.
217.
218.
219.
The medical capabilities derived from modern reproductive technology, such as in vitro fertilization and cryopreservation, have enabled physicians and scientists to intervene in the procreative process in innumerable ways. However, this intervention in the natural reproductive process raises both moral and legal concerns. In this Article, Professor Schiff explores some of the conflicts that may result when an individual or couple elects to cryopreserve gametes or embryos and subsequently, one or both of the contributors dies, or when gametes are harvested from a dead body. This Article will specifically address the moral and legal responses to circumstances where the decedent has either clearly expressed opposition to posthumous use of the reproductive material or else the decedent's intent regarding posthumous use of the material is ambiguous. By discussing philosophical and moral positions relating to personhood and the body and analyzing legal issues such as reproductive choice and organ donation, Professor Schiff creates the necessary format to examine and recommend the proper legal treatment of this controversial aspect of posthumous procreation.  相似文献   
220.
"Whatever, in connection with my professional practice, or not in connection with it, I see or hear, in the life of men, which ought not to be spoken of abroad, I will not divulge, as reckoning that all such should be kept secret."(1) "Safeguards to privacy in individual health care information are imperative to preserve the health care delivery relationship and the integrity of the patient record."(2) As early as the fourth and fifth centuries B.C., Hippocrates contemplated the importance of medical information to the care and treatment of patients. His oath suggests that privacy of a patient's medical information creates the foundation upon which a patient reposes trust in his or her physician. While defining the earliest version of the physician-patient privilege, the oath does not envision the extent of modern day access to healthcare information. A patient's relationship with the modern healthcare delivery system often includes a team of physicians, nurses, and other clinical support personnel. This relationship extends beyond direct caregivers and may include healthcare administrators, payor organizations, and persons unfamiliar with a patient's identity, such as researchers and public health officials. Accessing a patient's medical information links these participants to the patient's healthcare delivery relationship. The Hippocratic Oath does not contemplate such broad access, nor does it contemplate the emerging privacy crisis resulting from the application of computer technology to medical record storage and retrieval. The combination of broad access, individual privacy rights, and computer technology requires a rethinking of measures designed to protect the realities of the modern medical information society.  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