全文获取类型
收费全文 | 29576篇 |
免费 | 1335篇 |
国内免费 | 18篇 |
专业分类
30929篇 |
出版年
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.
Irene Hanson Frieze Anuka Ferligoj Tina Kogovek Tanja Rener Jasna Horvat Nataa arlija 《Psychology of women quarterly》2003,27(3):256-261
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.
Tavis S Campbell Blaine Ditto Jean R Séguin Jean-Marc Assaad Robert O Pihl Daniel Nagin Richard E Tremblay 《Health psychology》2002,21(6):594-600
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