全文获取类型
收费全文 | 44448篇 |
免费 | 1691篇 |
国内免费 | 20篇 |
出版年
2019年 | 456篇 |
2018年 | 672篇 |
2017年 | 716篇 |
2016年 | 753篇 |
2015年 | 553篇 |
2014年 | 658篇 |
2013年 | 3371篇 |
2012年 | 1157篇 |
2011年 | 1228篇 |
2010年 | 790篇 |
2009年 | 723篇 |
2008年 | 1067篇 |
2007年 | 1056篇 |
2006年 | 954篇 |
2005年 | 866篇 |
2004年 | 843篇 |
2003年 | 832篇 |
2002年 | 878篇 |
2001年 | 1303篇 |
2000年 | 1257篇 |
1999年 | 994篇 |
1998年 | 453篇 |
1997年 | 454篇 |
1996年 | 471篇 |
1992年 | 880篇 |
1991年 | 846篇 |
1990年 | 827篇 |
1989年 | 771篇 |
1988年 | 798篇 |
1987年 | 730篇 |
1986年 | 786篇 |
1985年 | 767篇 |
1984年 | 641篇 |
1983年 | 580篇 |
1982年 | 435篇 |
1981年 | 456篇 |
1979年 | 719篇 |
1978年 | 562篇 |
1977年 | 475篇 |
1976年 | 472篇 |
1975年 | 582篇 |
1974年 | 753篇 |
1973年 | 792篇 |
1972年 | 605篇 |
1971年 | 620篇 |
1970年 | 592篇 |
1969年 | 596篇 |
1968年 | 751篇 |
1967年 | 671篇 |
1966年 | 673篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
Simon P. Liversedge Kevin B. Paterson Emma L. Clayes 《The Quarterly Journal of Experimental Psychology Section A: Human Experimental Psychology》2002,55(1):225-240
We report an eye movement experiment investigating the influence of the focus operator only on syntactic processing of "long" relative clause sentences. Paterson, Liversedge, and Underwood (1999) found that readers were garden pathed by "short" reduced relative clause sentences containing the focus operator only . They argued that due to thematic differences between "short" and "long" relative clause sentences, garden path effect might not occur when "long" reduced relative clause sentences are read. Eye-tracking data show that garden path effects found during initial processing of the disambiguating verb of "long" reduced sentences without only were absent or delayed in the case of counterparts with only . We discuss our results in terms of current theories of sentence processing. 相似文献
32.
33.
34.
35.
36.
37.
Abby C King Bess Marcus David Ahn Andrea L Dunn W Jack Rejeski James F Sallis Mace Coday 《Health psychology》2006,25(3):336-347
The authors used recursive partitioning methods to identify combinations of baseline characteristics that predict 2-year physical activity success in each of 3 physical activity interventions delivered in the multisite Activity Counseling Trial. The sample consisted of 874 initially sedentary primary care patients, ages 35-75 years, who were at risk for cardiovascular disease. Predictors of 2-year success were specific to each intervention and represented a range of domains, including physiological, demographic, psychosocial, health-related, and environmental variables. The results indicate how specific patient subgroups (e.g., obese, unfit individuals; high-income individuals in stable health) may respond differently to varying levels and amounts of professional assistance and support. The methods used provide a practical first step toward identifying clinically meaningful patient subgroups for further systematic investigation. 相似文献
38.
Marcellus M Merritt Gary G Bennett Redford B Williams Christopher L Edwards John J Sollers 《Health psychology》2006,25(3):364-369
This study evaluated cardiovascular responses (CVR) to an active speech task with blatantly discriminatory (BRC) versus neutral (NRC) stimuli and an anger recall task in a sample of Black men (N = 73; age 18 to 47). Diastolic blood pressure scores were higher for NRC versus BRC stimuli during anger recall (p = .05). Moreover, persons in the NRC group who perceived high levels of racism (vs. no racism or BRC group) during active speech showed larger increases in blood pressure across postspeech rest, anger recall, and subsequent rest (p = .03). The notable elevation in CVR in response to an ambiguous event extends current models of racism suggesting that subtle racism is a psychosocial stressor that erodes health through chronically elevated CVR. 相似文献
39.
40.