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   73488篇
  免费   2806篇
  国内免费   39篇
  2020年   771篇
  2019年   935篇
  2018年   1303篇
  2017年   1339篇
  2016年   1431篇
  2015年   989篇
  2014年   1187篇
  2013年   6079篇
  2012年   2155篇
  2011年   2336篇
  2010年   1373篇
  2009年   1408篇
  2008年   2135篇
  2007年   2037篇
  2006年   1807篇
  2005年   1667篇
  2004年   1620篇
  2003年   1521篇
  2002年   1579篇
  2001年   2247篇
  2000年   2148篇
  1999年   1633篇
  1998年   867篇
  1997年   762篇
  1995年   685篇
  1992年   1375篇
  1991年   1319篇
  1990年   1307篇
  1989年   1222篇
  1988年   1137篇
  1987年   1142篇
  1986年   1173篇
  1985年   1250篇
  1984年   1013篇
  1983年   912篇
  1982年   705篇
  1981年   707篇
  1979年   1034篇
  1978年   771篇
  1976年   692篇
  1975年   934篇
  1974年   1027篇
  1973年   1008篇
  1972年   905篇
  1971年   813篇
  1970年   761篇
  1969年   770篇
  1968年   980篇
  1967年   941篇
  1966年   862篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
161.
Suicide and homicide rates by age were analyzed for Canada and the United States, indicating that suicide is higher in Canada and that homicide is higher in the United States. Results indicated a positive association between homicide and suicide rates in the United States but these two rates of death were not significantly associated in Canada. Holinger (1987) had associated the relative size of the cohort to the rates of suicide and homicide in young people in the United States. The more current data in both countries did not support Holinger's results. Using the measure devised by Easterlin (1980) and Ahlburg and Schapiro (1984) –that is, the proportion of youths aged 15–24 relative to adults aged 25–64–the correlation between the size of the youth cohort and the suicide rate of youths aged 15–24 was negative. It is concluded that the two patterns in these two countries may be explained from a historical perspective.  相似文献   
162.
We examined whether four personality traits—trait aggression, trait industriousness, trait deceptiveness, and trait self-control—were differentially related to 11 narrow-bandwidth CWB facets: (a) property destruction, (b) inappropriate verbal actions, (c) inappropriate physical actions, (d) poor attendance, (e) poor quality work, (f) unsafe behavior, (g) theft and related behavior, (h) misuse of information, (i) misuse of time and resources, (j) alcohol use, and (k) drug use. Based on responses from 404 employed participants recruited using Mechanical Turk, we found that each narrow-bandwidth personality trait often yielded stronger relationships with overall CWB than with narrow-bandwidth CWB facets.  相似文献   
163.
164.
165.
Robertson  Simon 《Synthese》2010,181(1):81-106

What is the relation between what we ought to do, on the one hand, and our epistemic access to the ought-giving facts, on the other? In assessing this, it is common to distinguish ‘objective’ from ‘subjective’ oughts. Very roughly, on the objectivist conception what an agent ought to do is determined by ought-giving facts in such a way that does not depend on the agent’s beliefs about, or epistemic access to, those facts; whereas on the subjectivist conception, what an agent ought to do depends on his beliefs. This paper defends the need for, and explicates, a third category of ‘ought’: ‘warranted oughts’. Section 1 introduces the distinction between objective and subjective ‘oughts’. Sections 2–3 draw attention to some serious problems with each. Section 4 examines, though rejects, a recent attempt to replace subjective ‘oughts’ with objective ‘wide-scope oughts’ operating on belief-action combinations. Section 5 explicates the notion of a warranted ‘ought’ and defends the account against some possible objections. The resulting a picture is one in which an adequate analysis of practical normativity requires both objective and warranted ‘oughts’. Section 6 concludes by responding to a worry about countenancing both.

  相似文献   
166.
167.
168.
169.
170.
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