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   5814篇
  免费   229篇
  6043篇
  2020年   76篇
  2019年   103篇
  2018年   140篇
  2017年   138篇
  2016年   183篇
  2015年   124篇
  2014年   121篇
  2013年   1748篇
  2012年   184篇
  2011年   215篇
  2010年   200篇
  2009年   177篇
  2008年   137篇
  2007年   154篇
  2006年   143篇
  2005年   87篇
  2004年   65篇
  2003年   69篇
  2002年   71篇
  2001年   81篇
  2000年   73篇
  1999年   97篇
  1998年   58篇
  1997年   52篇
  1996年   47篇
  1995年   57篇
  1994年   40篇
  1993年   57篇
  1992年   40篇
  1991年   55篇
  1990年   46篇
  1989年   44篇
  1988年   41篇
  1987年   56篇
  1986年   58篇
  1985年   62篇
  1984年   67篇
  1983年   64篇
  1982年   58篇
  1981年   59篇
  1980年   53篇
  1979年   54篇
  1978年   49篇
  1977年   47篇
  1976年   41篇
  1975年   41篇
  1974年   32篇
  1973年   39篇
  1972年   36篇
  1970年   35篇
排序方式: 共有6043条查询结果,搜索用时 15 毫秒
71.
Blue glass trade beads from well-dated late seventeenth- to early twentieth-century sites and collections have been analysed non-destructively by instrumental neutron activation analysis. The beads display enough variations in their elemental contents to allow us to characterize the different chemistries. The implication of these results is that similar chemical analyses of blue beads from undated archaeological sites may be used to help date the sites, since each bead chemistry has a specific earliest period.  相似文献   
72.
Accelerator mass spectrometry radiocarbon ages have been taken for a test suite of small samples of material removed from some of the ‘beeswax’art figures found in rock shelters in northern Australia. The results indicate that we can reliably date this unique form of rock art with no noticeable damage. We had not expected to find figures of any great antiquity, and so we were surprised to find that the ages obtained spanned the time period from the recent past to about 4000 BP.  相似文献   
73.
Random Time Sampling is an innovative data collection method which has potential for adaptation and use by geographers. Individual pocket-sized programmable beepers were used in a pilot study of the uses of time by older households and older people's attitudes to different activities. Random beeps were used to prompt individuals living in eleven Melbourne suburbs to record time use data in diaries over a period of a week. The method proved extremely effective and reliable, and many participants reporting that they enjoyed the exercise.  相似文献   
74.
75.
Reviews     
“JINNAH: CREATOR OF PAKISTAN.” by Hector Bolitho. John Murray. London, 7954. Pp. x and 244, illus.

“WANTED: AN ASIAN POLICY,” by Edwin O. Reisehauer. New York: Knopf, 7955. Pp. 256.  相似文献   

76.
77.
This essay argues for the moral necessity of retaining connections between the practices of representation and the ideal of authenticity. Using the example of racial representation, the author finds in the political philosophy of Charles Taylor and the cultural criticism of George Steiner resources for engaging in a creative dialogue with the history of our own tradition.  相似文献   
78.
79.
80.
Recent Paleolithic work along the middle Enisei River of central Siberia has revealed a long history of occupation that almost certainly begins in the Middle Pleistocene. Although the evidence for the Lower Paleolithic is somewhat tentative, there is good reason to believe that hunter-gatherers had periodically occupied the middle Enisei before the last interglacial. The steppe environment of the region during the Upper Pleistocene was relatively bountiful; more than 200 Upper Paleolithic sites, both before and after the Last Glacial Maximum, have been located. The region appears to have been abandoned during the Last Glacial Maximum. Most of Soviet and Russian archaeological work has been guided by a cultural–historical orientation, but recently there has been increased interest in developing adaptationist and ecological research strategies. The middle Enisei and the wider central Siberian region are key to understanding early adaptations to the north and the dimensions of Paleolithic population movements.  相似文献   
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