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   8032篇
  免费   268篇
  国内免费   5篇
  8305篇
  2020年   82篇
  2019年   97篇
  2018年   141篇
  2017年   148篇
  2016年   173篇
  2015年   131篇
  2014年   132篇
  2013年   803篇
  2012年   276篇
  2011年   288篇
  2010年   185篇
  2009年   221篇
  2008年   294篇
  2007年   320篇
  2006年   291篇
  2005年   264篇
  2004年   258篇
  2003年   305篇
  2002年   281篇
  2001年   119篇
  2000年   115篇
  1999年   140篇
  1998年   108篇
  1997年   119篇
  1996年   117篇
  1995年   132篇
  1994年   98篇
  1993年   117篇
  1992年   109篇
  1991年   93篇
  1990年   84篇
  1989年   91篇
  1988年   91篇
  1987年   103篇
  1986年   83篇
  1985年   95篇
  1984年   116篇
  1983年   122篇
  1982年   109篇
  1981年   106篇
  1980年   111篇
  1979年   111篇
  1978年   117篇
  1977年   111篇
  1976年   120篇
  1975年   95篇
  1974年   99篇
  1973年   93篇
  1972年   60篇
  1968年   47篇
排序方式: 共有8305条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
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   
5.
6.
7.
8.
We examined the relations between coping, locus of control, and social support and combat-related posttraumatic stress disorder (PTSD). The sample consisted of 262 Israeli soldiers who suffered a combat stress reaction episode during the 1982 Lebanon war and were followed 2 and 3 years after their participation in combat. Cross-sectional analyses revealed significant relations between locus of control, coping, and social support and PTSD at the two points of assessment. Changes in PTSD from Time 1 to Time 2 were also associated with changes in coping. We discuss theoretical and methodological implications of the findings.  相似文献   
9.
This study examined attitudes among 290 residents of three villages in South-West England toward proposals to build a nuclear power station nearby. Respondents were split into four groups according to whether they were neutral or in favor of a new power station either locally or elsewhere in the UK (Group PN), against one locally but neutral or pro elsewhere (LO), or moderately (MO) or extremely (XO) against a new power station both locally and elsewhere. The perceived impact of a nuclear power station on local life was assessed by 30 items. The PN group expected most benefit or least damage on all 30 items. On a majority of items the mean ratings of the LO group resembled those of the XO's more than did those of the MO's. A stepwise discriminant analysis yielded two interpretable functions. The first reflected a trend over the groups in the order PN-LO-MO-XO and was marked particularly by concern with impact on personal peace of mind. The second fuction discriminated the LO's from the other groups, suggesting that they were relatively less concerned with specifically nuclear risks, but more concerned with environmental conservation.  相似文献   
10.
The individual deciding on a nuclear weapons production policy is faced with a dilemma in which a choice must be made to support one of several conflicting defense policies. In order to investigate the social-psychological variables that are related to armament policy decision making, a telephone survey was conducted in the City of St. Louis, Missouri. Adult subjects (N= 110) responded to questions concerned with cognitive, attitudinal, and emotional responses to nuclear arms. Participants were also asked to choose a weapons production policy for the United States under conditions of continued and decreased Soviet nuclear arms production. Results indicated that respondents decisions about nuclear weapons production were related to their support for deterrence, the availability of their nuclear-related images, their emotional response to nuclear war, their attributions of responsibility for the prevention of nuclear war, and their political party affiliation. Distinctions between antinuclear decision-makers and pronuclear decision-makers are discussed.  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