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   29576篇
  免费   1335篇
  国内免费   18篇
  30929篇
  2021年   292篇
  2020年   474篇
  2019年   456篇
  2018年   817篇
  2017年   739篇
  2016年   771篇
  2015年   479篇
  2014年   633篇
  2013年   2648篇
  2012年   1215篇
  2011年   1251篇
  2010年   705篇
  2009年   668篇
  2008年   1068篇
  2007年   963篇
  2006年   912篇
  2005年   762篇
  2004年   647篇
  2003年   626篇
  2002年   591篇
  2001年   866篇
  2000年   913篇
  1999年   657篇
  1998年   288篇
  1997年   248篇
  1996年   235篇
  1995年   215篇
  1992年   523篇
  1991年   462篇
  1990年   525篇
  1989年   443篇
  1988年   413篇
  1987年   385篇
  1986年   395篇
  1985年   458篇
  1984年   364篇
  1983年   304篇
  1982年   230篇
  1979年   339篇
  1978年   270篇
  1975年   307篇
  1974年   358篇
  1973年   361篇
  1972年   280篇
  1971年   254篇
  1970年   218篇
  1969年   236篇
  1968年   302篇
  1967年   258篇
  1966年   285篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
21.
Determinants of gender-role attitudes were examined in samples of university students from Pittsburgh in the United States, Ljubljana in Slovenia, and Osijek in Croatia. Surveys including items from the Attitudes Toward Women Scale and the Neosexism Scale were administered to a total of 1,544 U.S. students, 912 Slovene students, and 996 Croatian students between the years of 1991 and 2000. As predicted, men held less egalitarian or more sexist attitudes about the appropriate roles for women and men, and those with more frequent attendance at religious services held more sexist attitudes. No changes in attitudes were found for women over time, but Slovene males were found to become more traditional over time.  相似文献   
22.
A growing literature has observed a significant reduction in pain sensitivity among hypertensive animals and humans. It is uncertain whether a reduced sensitivity to pain can be observed in nonnotensive individuals who go on to develop high blood pressure. Blood pressure (BP) was reassessed in one hundred fifteen 19-year-old boys initially tested at age 14, when they were also presented with a pain stimulus (mechanical finger pressure). Hierarchical regression analyses indicated that information regarding pain tolerance improved prediction of changes in systolic and diastolic blood pressure beyond that afforded by differences in BP at age 14, parental history of hypertension, and body mass index. These analyses suggest that pain sensitivity may be associated with physiological processes involved in the development of sustained high blood pressure.  相似文献   
23.
24.
25.
26.
27.
28.
29.
30.
Public goods theories highlight an incentive system that rewards ‘free riding’ on the contributions of early contributors toward collective actions. However, because such theories focus on creation of the good, they may underestimate returns that accrue to early contributors subsequent to the good's realization. The concept of formative investment is introduced here to describe the extent to which organizations help to create public goods such as interorganizational linkages like participatory federations. Data from the CEOs of 48 organizations involved in a participatory federation were used to assess how an organization's level of formative investment is related to later patterns of dependency and interaction among federation members. Findings suggest that from a long‐term perspective, and for goods that involve communication and interaction, the incentive structure may not be so favorable for free riders. To the extent that organizations with high formative investment have the capability to envision the future and communicate that vision to potential federation partners, they may be able to both reduce free riding and secure for themselves advantageous positions in the subsequent network of relations.  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