全文获取类型
收费全文 | 40024篇 |
免费 | 1603篇 |
国内免费 | 16篇 |
出版年
2020年 | 489篇 |
2019年 | 620篇 |
2018年 | 830篇 |
2017年 | 899篇 |
2016年 | 954篇 |
2015年 | 625篇 |
2014年 | 759篇 |
2013年 | 3207篇 |
2012年 | 1383篇 |
2011年 | 1418篇 |
2010年 | 909篇 |
2009年 | 858篇 |
2008年 | 1247篇 |
2007年 | 1247篇 |
2006年 | 1121篇 |
2005年 | 982篇 |
2004年 | 933篇 |
2003年 | 885篇 |
2002年 | 886篇 |
2001年 | 1201篇 |
2000年 | 1143篇 |
1999年 | 893篇 |
1998年 | 405篇 |
1997年 | 397篇 |
1996年 | 371篇 |
1995年 | 384篇 |
1994年 | 366篇 |
1993年 | 358篇 |
1992年 | 751篇 |
1991年 | 660篇 |
1990年 | 710篇 |
1989年 | 615篇 |
1988年 | 646篇 |
1987年 | 605篇 |
1986年 | 610篇 |
1985年 | 562篇 |
1984年 | 515篇 |
1983年 | 491篇 |
1982年 | 367篇 |
1979年 | 581篇 |
1978年 | 403篇 |
1975年 | 463篇 |
1974年 | 504篇 |
1973年 | 538篇 |
1972年 | 397篇 |
1971年 | 393篇 |
1969年 | 405篇 |
1968年 | 472篇 |
1967年 | 429篇 |
1966年 | 355篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
41.
Collin L. Davidson MS LaRicka R. Wingate PhD Kathy A. Rasmussen BA Meredith L. Slish BA 《Suicide & life-threatening behavior》2009,39(5):499-507
The current study hypothesized that (1) hope would negatively predict burdensomeness, thwarted belongingness, and acquired capability to enact lethal injury; (2) hope would negatively predict suicidal ideation; and (3) the interpersonal suicide risk factors would predict suicidal ideation. Results indicated that hope negatively predicted burdensomeness and thwarted belongingness, but positively predicted acquired capability to enact suicide. Contrary to our second hypothesis, hope did not predict suicidal ideation, but interpersonal risk factors for suicide predicted suicidal ideation. Results are discussed in terms of implications for hope theory and Joiner's (2005) interpersonal risk factors for suicide, and for clinical practice. 相似文献
42.
43.
44.
Elizabeth J. Robinson Stephen A. Butterfill Erika Nurmsoo 《The British journal of developmental psychology》2011,29(4):961-980
In five experiments, we examined 3‐ to 6‐year‐olds’ understanding that they could gain knowledge indirectly from someone who had seen something they had not. Consistent with previous research, children judged that an informant, who had seen inside a box, knew its contents. Similarly, when an informant marked a picture to indicate her suggestion as to the content of the box, 3‐ to 4‐year‐olds trusted this more frequently when the informant had seen inside the box than when she had not. Going beyond previous research, 3‐ to 4‐year‐olds were also sensitive to informants’ relevant experience when they had to look over a barrier to see the marked picture, or ask for the barrier to be raised. Yet when children had to elicit the informant's suggestion, rather than just consult a suggestion already present, even 4‐ to 5‐year‐olds were no more likely to do so when the informant had seen the box's content than when she had not, and no more likely to trust the well‐informed suggestion than the uninformed one. We conclude that young children who can ask questions may not yet fully understand the process by which they can gain accurate information from someone who has the experience they lack. 相似文献
45.
46.
47.
48.
49.
50.