全文获取类型
收费全文 | 65112篇 |
免费 | 2625篇 |
国内免费 | 20篇 |
专业分类
67757篇 |
出版年
2020年 | 637篇 |
2019年 | 846篇 |
2018年 | 1098篇 |
2017年 | 1164篇 |
2016年 | 1212篇 |
2015年 | 910篇 |
2014年 | 1068篇 |
2013年 | 5078篇 |
2012年 | 1967篇 |
2011年 | 2123篇 |
2010年 | 1307篇 |
2009年 | 1328篇 |
2008年 | 1917篇 |
2007年 | 1917篇 |
2006年 | 1751篇 |
2005年 | 1566篇 |
2004年 | 1461篇 |
2003年 | 1376篇 |
2002年 | 1487篇 |
2001年 | 2056篇 |
2000年 | 2020篇 |
1999年 | 1557篇 |
1998年 | 787篇 |
1997年 | 671篇 |
1996年 | 677篇 |
1995年 | 617篇 |
1992年 | 1299篇 |
1991年 | 1195篇 |
1990年 | 1172篇 |
1989年 | 1076篇 |
1988年 | 1058篇 |
1987年 | 1007篇 |
1986年 | 1089篇 |
1985年 | 1105篇 |
1984年 | 937篇 |
1983年 | 854篇 |
1982年 | 611篇 |
1981年 | 607篇 |
1979年 | 973篇 |
1978年 | 722篇 |
1975年 | 816篇 |
1974年 | 868篇 |
1973年 | 948篇 |
1972年 | 801篇 |
1971年 | 749篇 |
1970年 | 664篇 |
1969年 | 689篇 |
1968年 | 883篇 |
1967年 | 803篇 |
1966年 | 685篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
81.
有两个问题常常被人们提及。第一个是为什么宗教可以持续至今?第二个是我们是否可以创造出世俗人文的替代品。对于为什么宗教可以一直延续这个问题,众说纷纭。 相似文献
82.
A theoretical structure for multiattribute decision making is presented, based on a dynamical system for interactions in a neural network incorporating affective and rational variables. This enables modeling of problems that elude two prevailing economic decision theories: subjective expected utility theory and prospect theory. The network is unlike some that fit economic data by choosing optimal weights or coefficients within a predetermined mathematical framework. Rather, the framework itself is based on principles used elsewhere to model many other cognitive and behavioral data, in a manner approximating how humans perform behavioral functions. Different, interconnected modules within the network encode (a) attributes of objects among which choices are made, (b) object categories, (c) and goals of the decision maker. An example is utilized to simulate the actual consumer choice between old and new versions of Coca-Cola. Potential applications are also discussed to market decisions involving negotiations between participants, such as international petroleum traders. 相似文献
83.
84.
Matthew J. Traxler Michael D. Bybee Martin J. Pickering 《The Quarterly Journal of Experimental Psychology Section A: Human Experimental Psychology》1997,50(3):481-497
An eye-tracking experiment investigated whether incremental interpretation applies to interclausal relationships. According to Millis and Just's (1994) delayed-integration hypothesis, interclausal relationships are not computed until the end of the second clause, because the processor needs to have two full propositions before integration can occur. We investigated the processing of causal and diagnostic sentences (Sweetser, 1990; Tversky & Kahneman, 1982) that contained the connective because . Previous research (Traxler, Sanford, Aked, & Moxey, 1997) has demonstrated that readers have greater difficulty processing diagnostic sentences than causal sentences. Our results indicated that difficulty processing diagnostic sentences occurred well before the end of the second clause. Thus comprehenders appear to compute interclausal relationships incrementally. 相似文献
85.
86.
87.
88.
89.
Visual acuity for the detection of gratings at four orientations was measured for groups of ten boys and ten girls aged five to seven years, from the following four populations: Scots in Glasgow, Pakistanis in Glasgow, Gaels in Stornoway (Outer Hebrides) and East Anglians in Littleport (Cambridgeshire fenlands). The Glaswegians, both Scottish and Pakistani, showed the normal pattern of anisotropy, with poorest acuity for oblique orientations; the East Anglians showed no significant anisotropy; while the Gaels were unusual in showing poorest horizontal acuity. A group of fourteen Pakistani children in Stornoway differed slightly from a matched group of Gaels. The group differences bore little relation to the visual environments, and were probably due to genetic or cultural factors. The relatively poor horizontal acuity of the Gaels was not correlated with astigmatism. Sex differences were also found, with the boys showing higher mean acuity and a higher ratio between vertical and oblique acuity. 相似文献
90.
N B Anderson R B Williams J D Lane T Haney S Simpson S J Houseworth 《Health psychology》1986,5(4):393-406
The purpose of this study was to determine the effects of Type A behavior and family history of hypertension on cardiovascular reactivity to mental stress in a group of employed black women. Measures of heart rate and of systolic blood pressure (SBP) and diastolic blood pressure (DBP) were taken at rest, during a mental arithmetic task, and during the Type A Structured Interview (SI). Results indicated that the Type A behavior pattern was associated with SBP and DBP hyperresponsivity during the SI but not during mental arithmetic. Additionally, certain speech components of the Type A pattern, as well as features of the potential-for-hostility component, were also related to cardiovascular responses during the SI. Family history of hypertension did not influence the cardiovascular parameters either alone or in combination with Type A behavior. The results suggest that many of the cardiovascular response characteristics of the Type A pattern that have been observed in predominantly white samples also hold true for blacks. Replication of these findings with other subgroups of blacks, such as young females and middle-aged males, will help document the generality of these findings within the black population. 相似文献