收费全文 | 12062篇 |
免费 | 511篇 |
国内免费 | 6篇 |
12579篇 |
2023年 | 67篇 |
2022年 | 62篇 |
2021年 | 123篇 |
2020年 | 220篇 |
2019年 | 254篇 |
2018年 | 334篇 |
2017年 | 310篇 |
2016年 | 376篇 |
2015年 | 245篇 |
2014年 | 333篇 |
2013年 | 1312篇 |
2012年 | 566篇 |
2011年 | 562篇 |
2010年 | 412篇 |
2009年 | 417篇 |
2008年 | 584篇 |
2007年 | 563篇 |
2006年 | 501篇 |
2005年 | 433篇 |
2004年 | 468篇 |
2003年 | 423篇 |
2002年 | 414篇 |
2001年 | 178篇 |
2000年 | 195篇 |
1999年 | 185篇 |
1998年 | 188篇 |
1997年 | 157篇 |
1996年 | 107篇 |
1995年 | 146篇 |
1994年 | 143篇 |
1993年 | 131篇 |
1992年 | 123篇 |
1991年 | 111篇 |
1990年 | 110篇 |
1989年 | 106篇 |
1988年 | 110篇 |
1987年 | 107篇 |
1986年 | 85篇 |
1985年 | 101篇 |
1984年 | 116篇 |
1983年 | 97篇 |
1982年 | 110篇 |
1981年 | 115篇 |
1980年 | 104篇 |
1979年 | 102篇 |
1978年 | 109篇 |
1977年 | 89篇 |
1976年 | 93篇 |
1975年 | 64篇 |
1974年 | 76篇 |
Using a Findley changeover procedure, two groups of rats were exposed to various concurrent variable-time (VT) schedules of milk presentation. The rules governing the operation of the timers for the stimulus events differed for the two groups with resulting differences in the overall degree of changeover responding but not with respect to time allocation measures, which in both cases consisted of undermatching. When an interrupted VT reinforcement timer was reset upon re-entry of that component, the rats tended to emit changeover responses almost exclusively to the more favorable component. When the VT reinforcement timers were left running regardless of which components the rats selected, changeover responses were significantly more frequent and equally distributed among both the more and less favorable components. In comparing the present results with those from a similar procedure in which shock was used (Deluty & Church, 1978), it is apparent that what is basic to choice in concurrent interval schedules is not matching or some mathematical variation of it. Instead, it is a tendency to optimize on the basis of the favorability of the stimulus events and the contingencies regarding how those events are timed and administered.
相似文献Perspectives on New Religious Movements John A. Sauba, 1995 London: Geoffrey Chapman 240 pp., £12.99 (pb), £35.00 (hb) ISBN 0–225–66787–8 (pb),’ ISBN 0–225–66786‐X (hb)
New Religions and the New Europe Robert Towler, ed., 1995 Aarhus: Aarhus University Press 246 pp., £19.95 ISBN 87 7288 433 9
A New Dictionary of Religions John R. Hinnells, ed., 1995 Oxford: Blackwell 760 pp., US$74.95 (hb) ISBN 0–631–18139–3
Den Fremden verstehen: Eine Praktische Hermeneutik Theo Sundermeier, 1996 Göttingen: Vandenhoek & Ruprecht 260 pp. ISBN 3–525–01619–0
Religion and Mass Media: Audiences and Adaptations Daniel A. Stout & Judith M. Buddenbaum, eds, 1996 Thousand Oaks, California: Sage Publications 294 pp., £37.00 (hb), £18.50 (pb) ISBN 0–8039–7173–7 (hb), 0–8039–7174–5 (pb)
Contemporary Mainstream Religion: Studies from Humberside and Lincolnshire Peter G. Forster, ed., 1995 Aldershot: Avebury xxxvii +135 pp., £30.00 ISBN 1–8562–919–2
One Earth Many Religions: Multifaith Dialogue and Global Responsibility Paul F. Kntiter, 1995 Maryknoll, New York: Orbis xiv + 218 pp., US$17.00 ISBN 1–57075–037–8
A Wider Vision: A History of the World Congress of Faiths 1936–1996 Marcus Braybrooke, 1996 Oxford: Oneworld Publications 192 pp., £10.99, US$16.95 ISBN 1–85168–119–1
The Phenomenon of Teilhard: Prophet for a New Age David H. Lane, 1996 Macon, Georgia: Mercer University Press xvi +192 pp., US$21.95 ISBN 0–86554–498–0
The Wisdom of the Wyrd: Teachings for Today from our Ancient Past Brian Bates, 1996 London: Rider xiii +306 pp., £12.99 ISBN 0‐712E‐7277‐X
Desinformation als Methode. Die Bahā'ísmus‐Monographie des F. Ficicchia Udo Schaefer, Nicola Towfigh, Ulrich Gollmer, 1995 Hildesheim Georg Olms Verlag xiii + 685 pp., DM 65.00 (hb) ISBN 3–487–10041‐X
The New Latin American Mission History (Latin American Studies Series) Erick Langer & Robert H. Jackson, eds, 1995 Lincoln & London: University of Nebraska Press 212 pp., £15.95 (pb), £32.95 (hb) ISBN 0–8032–7953–1 (pb), ISBN 0–8032–2911–9 (hb)
Gender Rituals: Female Initiation in Melanesia Nancy C. Lutkehaus & Paul B. Roscoe, eds, 1995 New York Routledge 265 pp., £13.99 (pb), £37.50 (hb) ISBN 0–415–91107–9 (pb), ISBN 0–415–91106–0 (hb)
Daughters of Anowa: African Women and Patriarchy Mercy Amba Oduyoye, 1995 Maryknoll, New York: Orbis Books 229 pp., US$18.00 (pb) ISBN 0–88344–999–4
Christianity in Africa: The Renewal of a Non‐Western Religion Kwame Bediako, 1995 Edinburgh: Edinburgh University Press; Maryknoll: Orbis Books 276 pp., £16.95 ISBN 0–7486–0625–4
The Christian Heritage in the Holy Land Anthony O'Mahony with Goran Gunner & Kevork Hintuan, eds, 1995 Epping, Essex: Scorpion Cavendish xi + 320 pp., £15.95 ISBN 1–900269–06–6 (pb)
Patterns of the Sacred: English Protestant and Russian Orthodox Pilgrims of the Nineteenth Century Ruth & Thomas Hummel, 1995 Epping, Essex: Scorpion Cavendish ix + 76 pp., £10.00 ISBN 1–900269–08–2 (pb)
Pilgrimage Past and Present: Sacred Travel and Sacred Space in the World Religions Simon Coleman & John Elsner, 1995 London: British Museum Press 240 pp., Illus., £20.00 ISBN 0–7141–1738–2 相似文献