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   834篇
  免费   36篇
  2023年   14篇
  2021年   5篇
  2020年   22篇
  2019年   32篇
  2018年   41篇
  2017年   54篇
  2016年   40篇
  2015年   25篇
  2014年   28篇
  2013年   225篇
  2012年   34篇
  2011年   23篇
  2010年   35篇
  2009年   31篇
  2008年   21篇
  2007年   20篇
  2006年   14篇
  2005年   17篇
  2004年   14篇
  2003年   15篇
  2002年   15篇
  2001年   10篇
  2000年   12篇
  1999年   12篇
  1998年   11篇
  1997年   5篇
  1996年   9篇
  1995年   5篇
  1994年   6篇
  1993年   3篇
  1992年   5篇
  1991年   4篇
  1990年   3篇
  1989年   2篇
  1988年   3篇
  1985年   2篇
  1984年   6篇
  1983年   2篇
  1982年   9篇
  1981年   3篇
  1980年   4篇
  1979年   3篇
  1977年   3篇
  1976年   3篇
  1975年   3篇
  1974年   3篇
  1973年   2篇
  1972年   2篇
  1971年   2篇
  1968年   2篇
排序方式: 共有870条查询结果,搜索用时 163 毫秒
101.
102.
Chickens were part of the Lapita cultural complex, transported into and through the Pacific by prehistoric colonists; as such they can be used as a proxy for tracking prehistoric migration and interaction. The Lapita site of Teouma in Vanuatu is well known for the recovery of complete dentate stamped pots and a cemetery containing the largest collection of Lapita period skeletons ever found. Chicken bones recovered from these excavations provide the first ancient DNA sequences from any commensal organism directly associated with a Lapita context. The ancient mtDNA sequences obtained from two Teouma chicken bones are compared with previously published archaeologically derived ancient DNA sequences to extend our understanding of the spread of chickens in Pacific prehistory. The results also show that the haplogroup E signature was present in very early populations of chickens transported into Remote Oceania. This study also adds to the suite of available data relating to isotopic signatures for commensal animals during the early settlement of Vanuatu and may reveal a different diet for Teouma chickens than those from other early prehistoric assemblages in the Pacific.  相似文献   
103.
104.
105.
The history of rape on trial in colonial India sheds new light on the colonial civilising mission and the claims made by white men about saving brown women from brown men. Through an analysis of almost a century of case law, this article concludes that the modernisation of law and the development of a new medico-legal understanding of rape introduced evidentiary standards that placed a heavy burden on Indian women seeking judicial remedy in colonial courts. The fear imported from Britain of false charges combined with colonial views about Indian culture to make native female complainants doubly dubious. The colonial jurisprudence has survived to devastating effect in postcolonial India and Pakistan in ways that are explored and explained by the author.  相似文献   
106.
107.
This article examines the portrayal of non-North Koreans in North Korean textbooks to assess the influences on the formation of North Korean identity, and how such identity formation is important in Kim Jeong-il's retention of power. This study not only looks closely at textual representations; it also examines how political and ideological changes in North Korea had a critical influence on these texts. The study encompasses both lexico-grammatical analysis and the analysis of textual and visual images, based on an examination of six North Korean language textbooks published from 1954 to 2000. It demonstrates that North Korean identity is defined through the portrayal of non-North Koreans, particularly enemy others. The portrayal of non-North Koreans facilitates the formation of a solid North Korean identity – an identity that entails serving their political leaders, remaining vigilant against threats to their country, and liberating South Koreans from poverty and oppression by America and its puppet states.  相似文献   
108.
109.
Until now, the oldest known human hair was from a 9000-year-old South American mummy. Here we report fossil hairs of probable human origin that exceed that age by about 200,000 years. The hairs have been discovered in a brown hyaena (Parahyaena brunnea) coprolite from Gladysvale cave in South Africa. The coprolite is part of a hyaena latrine preserved in calcified cave sediment dated between 195,000 and 257,000 years ago. This find supports the hypothesis that hyaenas accumulated some of the early hominin remains found in cave sites, and provides a new source of information on Pleistocene mammals in the Sterkfontein Valley.  相似文献   
110.
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