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   347篇
  免费   17篇
各国政治   24篇
工人农民   33篇
世界政治   34篇
外交国际关系   10篇
法律   185篇
中国政治   6篇
政治理论   70篇
综合类   2篇
  2023年   1篇
  2022年   2篇
  2021年   5篇
  2020年   11篇
  2019年   11篇
  2018年   13篇
  2017年   16篇
  2016年   12篇
  2015年   13篇
  2014年   10篇
  2013年   42篇
  2012年   16篇
  2011年   8篇
  2010年   20篇
  2009年   14篇
  2008年   6篇
  2007年   17篇
  2006年   6篇
  2005年   13篇
  2004年   9篇
  2003年   19篇
  2002年   10篇
  2001年   4篇
  2000年   6篇
  1999年   5篇
  1998年   1篇
  1997年   8篇
  1996年   4篇
  1995年   8篇
  1994年   6篇
  1993年   2篇
  1992年   1篇
  1991年   5篇
  1990年   6篇
  1989年   5篇
  1988年   7篇
  1987年   3篇
  1986年   4篇
  1985年   3篇
  1984年   1篇
  1983年   2篇
  1982年   1篇
  1980年   1篇
  1979年   1篇
  1978年   1篇
  1976年   1篇
  1974年   1篇
  1973年   2篇
  1967年   1篇
排序方式: 共有364条查询结果,搜索用时 497 毫秒
11.
Abstract

Peasants and rural communities are on the front lines of most climate catastrophes taking place nowadays worldwide; at the same time, we have been the ones taking care of our common planet over generations. This article begins with a brief overview of the current situation of land use in the world today and links it to climate issues. It then describes some of the solutions to climate threats being negotiated between national governments and the private sector. It then highlights solutions that communities are already implementing and concludes with the reasons why systemic change is needed in order to achieve agrarian and climate justice.  相似文献   
12.
13.
14.
Much of the public budgeting literature focuses on the institutional rules of budgeting and how those rules affect process and outcomes. This study focuses on a particularly rudimentary rule of budgeting: the length of the budget period. State budgets are dictated (constitutionally or statutorily) to recur over one-or two-year intervals. Statistical analysis of the determinants of state budget periodicity shows that the more states spend, ceteris paribus, the more likely they are to budget annually. I hypothesize that budget periodicity has the opposite effect on spending: Biennial budget states spend more, ceteris paribus, than annual budget states spend. Ordinary least squares analysis does not support the hypothesis, but with instrumental variable methods, biennial budgeting exhibits a positive and statistically significant effect on state spending.  相似文献   
15.
16.
17.
B. Reviews     
THE CAMBRIDGE HISTORY OF ARABIC LITERATURE. Volume 1: Arabic Literature to the End of the Unayyad Period. Edited by A.F.L. Beeston, T.M.Johnstone, R.B.Serjeant and G.R.Smith, pp.xvi, 547. Cambridge University Press, 1983. £37.95.

AL‐MAQRIZI'S “BOOK OF CONTENTION AND STRIFE CONCERNING THE RELATIONS BETWEEN THE BANU UMAYYA AND THE BANU HASHIM”. Translated into English, with an introduction and commentary by C.E.Bosworth. (Journal of Semitic Studies, Monograph No.3), Manchester, Department of Near Eastern Studies, University of Manchester, 1980. pp.157.

ARABIC CULTURE THROUGH ITS LANGUAGE AND LITERATURE. By M.H. Bakalla. London, Kegan Paul International, 1984. pp.371, 51, plates, maps.

ARABIC LINGUISTICS: AN INTRODUCTION AND BIBLIOGRAPHY. By M.H. Bakalla. London, Mansell, 1983. pp.742.

LA RELATION DE THOMAS PELLOW: UNE LECTURE DU MAROC AU 18e SIÈCLE. By Magali Morsy. (Synthèse No.12), Paris, Editions Recherche sur les Civilisations, 1983. pp.254, 17pl. FF.129.

ESPANA Y EL NORTE DE AFRICA: EL PROTECTORADO DE MARRUECOS (1912–56). By Victor Morales Lezcano. Madrid, Universidad Nacional de Educacion a Distancia, 1984. pp.249. Photos., maps, diagrams. 600.00 ptas.

EGYPT AND THE PALESTINE QUESTION 1936–1945. By Thomas Mayer. Berlin, Klaus Schwarz Verlag, 1983. pp.391 (paperback).

SUDAN. By M.W.Daly. (World Bibliographical Series, Vol.40.) Oxford (UK) & Santa Barbara (USA), Clio Press, 1983. pp.xvi, 176, 1 map. £19.50.

THE OTHER FACE OF OPEC: FINANCIAL ASSISTANCE TO THE THIRD WORLD. ENERGY RESOURCES AND POLICIES OF THE MIDDLE EAST AND NORTH AFRICA. By Ibrahim F.I. Shihata. London, Longman, 1982. pp.281 (paperback).

DEVELOPING EDUCATION SYSTEMS IN THE OIL STATES OF ARABIA: CONFLICTS OF PURPOSE AND FOCUS. By J.S.Birks and J.A.Rimmer. (Occasional Papers Series, No.21: Manpower and Migration Series, no.3). University of Durham, Centre for Middle Eastern and Islamic Studies, 1984. pp.33. E2.50.

BIBLIOGRAPHICAL GUIDE TO IRAN: THE MIDDLE EAST LIBRARY COMMITTEE GUIDE. Edited by L.P.Elwell‐Sutton. Sussex, The Harvester Press/New Jersey, Barnes & Noble Books, 1984. pp.462.

ARABISCHE UND PERSISCHE PRIVATURKUNDEN DES 12. UND 13. JAHRHUNDERTS AUS ARDABIL (ASERBEIDSCHAN). By Monika Gronke. (Islamkundliche Untersuchungen, Bd 72), Berlin, Klaus Schwarz Verlag, 182. pp.555.

MYSTICISM AND DISSENT: SOCIORELIGIOUS THOUGHT IN QAJAR IRAN. By Mangol Bayat. Syracuse, N.Y., Syracuse U.P., 1982. pp.xvii, 228. $25.00.

SOCIAL DISINTEGRATION AND POPULAR RESISTANCE IN THE OTTOMAN EMPIRE 1881–1908: REACTIONS TO EUROPEAN ECONOMIC PENETRATION. By Donald Quataert. New York, Columbia U.P., 1983. pp.xxii, 205. $45.50.  相似文献   

18.
A sensitive analytical method was developed for quantitative analysis of delta(9)-tetrahydrocannabinol (delta(9)-THC), 11-nor-delta(9)-tetrahydrocannabinol-carboxylic acid (delta(9)-THC-COOH), cannabinol (CBN) and cannabidiol (CBD) in human hair. The identification of delta(9)-THC-COOH in hair would document Cannabis use more effectively than the detection of parent drug (delta(9)-THC) which might have come from environmental exposure. Ketamine was added to hair samples as internal standard for CBN and CBD. Ketoprofen was added to hair samples as internal standard for the other compounds. Samples were hydrolyzed with beta-glucuronidase/arylsulfatase for 2h at 40 degrees C. After cooling, samples were extracted with a liquid-liquid extraction procedure (with chloroform/isopropyl alcohol, after alkalinization, and n-hexane/ethyl acetate, after acidification), which was developed in our laboratory. The extracts were analysed before and after derivatization with pentafluoropropionic anhydride (PFPA) and pentafluoropropanol (PFPOH) using a Hewlett Packard gas chromatographer/mass spectrometer detector, in electron impact mode (GC/MS-EI). Derivatized delta(9)-THC-COOH was also analysed using a Hewlett Packard gas chromatographer/mass spectrometer detector, in negative ion chemical ionization mode (GC/MS-NCI) using methane as the reagent gas. Responses were linear ranging from 0.10 to 5.00 ng/mg hair for delta(9)-THC and CBN, 0.10-10.00 ng/mg hair for CBD, 0.01-5.00 ng/mg for delta(9)-THC-COOH (r(2)>0.99). The intra-assay precisions ranged from <0.01 to 12.40%. Extraction recoveries ranged from 80.9 to 104.0% for delta(9)-THC, 85.9-100.0% for delta(9)-THC-COOH, 76.7-95.8% for CBN and 71.0-94.0% for CBD. The analytical method was applied to 87 human hair samples, obtained from individuals who testified in court of having committed drug related crimes. Quantification of delta(9)-THC-COOH using GC/MS-NCI was found to be more convenient than GC/MS-EI. The latter may give rise to false negatives due to the detection limit.  相似文献   
19.
Allele frequencies for the nine STRs included in the AmpFlSTR Profiler Plus kit (D3S1358, VWA, FGA, D8S1179, D21S11, D18S51, D5S818, D13S317 and D7S820) were estimated from a sample of 143 unrelated individuals living in different regions of Greece.  相似文献   
20.
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