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   3077篇
  免费   358篇
  2021年   21篇
  2020年   34篇
  2019年   141篇
  2018年   119篇
  2017年   134篇
  2016年   190篇
  2015年   122篇
  2014年   130篇
  2013年   779篇
  2012年   127篇
  2011年   148篇
  2010年   119篇
  2009年   104篇
  2008年   116篇
  2007年   89篇
  2006年   82篇
  2005年   60篇
  2004年   73篇
  2003年   64篇
  2002年   52篇
  2001年   53篇
  2000年   59篇
  1999年   17篇
  1998年   44篇
  1997年   42篇
  1996年   31篇
  1995年   30篇
  1994年   34篇
  1993年   20篇
  1992年   17篇
  1991年   15篇
  1990年   15篇
  1989年   10篇
  1988年   15篇
  1987年   22篇
  1986年   21篇
  1985年   19篇
  1984年   28篇
  1983年   24篇
  1982年   28篇
  1981年   11篇
  1980年   18篇
  1979年   19篇
  1978年   9篇
  1977年   23篇
  1976年   17篇
  1975年   13篇
  1974年   13篇
  1972年   9篇
  1968年   8篇
排序方式: 共有3435条查询结果,搜索用时 15 毫秒
91.
92.
93.
94.
95.
One of the most intriguing questions for archaeologists studying clay artefacts concerns technologies employed in their manufacture and whether standardization can be demonstrated through traditional ceramic analysis. Visual comparisons and mechanical measurements have been used to determine correlations and infer standardization. Using a laser multi‐line scanner and software developed to quantify Hausdorff distances between vertices in 3D surfaces, we analysed sample collections of figurines and moulds from Belize, Mexico and Honduras. The results indicated that this procedure was a more precise indicator of common source and standardization in moulded clay artefacts. This method provided data relevant to assessing the scope of ancient trade networks and the nature of social and economic relationships that existed among the ancient inhabitants of Mesoamerica.  相似文献   
96.
97.
98.
In October 1942, five British civilians and 17 New Zealand coast-watchers were executed by Japanese military forces, at Tarawa, Gilbert Islands (Kiribati), in the central Pacific. The bodies were buried in a mass grave, the location of which became obscured when the Japanese constructed military fortifications. A battle was fought at Tarawa in November 1943 whereby the US Marines defeated the Japanese defenders and took control of the island. In the battle more than six thousand men died and their bodies were buried in hastily prepared and often unmarked graves. Since the end of the war the remains of hundreds of Americans and some Japanese have been located and recovered from Tarawa but nothing among the remains has been identified as belonging to the 22 British subjects. A problem in locating the grave of the British has been a lack of any record of its position. In this paper the authors consider the documentary evidence including an important map and a report on the first attempt, using local knowledge, to locate the grave. The specific area of the grave is identified, the date of the executions is confirmed and the reasons behind the order to execute are discussed.  相似文献   
99.
An error dating from 1885 in mapping the upper Strickland River, Papua New Guinea, was reinforced and extended by government officer Charles Karius in 1929 when reporting results from a lengthy exploratory patrol. Detailed maps produced by the US Army and the Royal Australian Survey Corps in, respectively, 1942 and 1966 perpetuated these errors. It was not until 1979, with release of a series of 1:100,000 topographic maps, that long-standing errors were finally put to rest. Throughout these years, the contributions of well-informed people tended to be ignored in favour of the opinions of those whose status implied authority.  相似文献   
100.
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