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   412篇
  免费   14篇
  2023年   3篇
  2021年   1篇
  2020年   9篇
  2019年   15篇
  2018年   17篇
  2017年   26篇
  2016年   20篇
  2015年   15篇
  2014年   20篇
  2013年   104篇
  2012年   16篇
  2011年   12篇
  2010年   7篇
  2009年   12篇
  2008年   13篇
  2007年   10篇
  2006年   9篇
  2005年   6篇
  2004年   6篇
  2003年   5篇
  2002年   4篇
  2001年   7篇
  2000年   2篇
  1999年   5篇
  1998年   5篇
  1997年   6篇
  1996年   2篇
  1995年   3篇
  1994年   2篇
  1993年   6篇
  1992年   3篇
  1991年   2篇
  1990年   6篇
  1989年   2篇
  1988年   2篇
  1987年   6篇
  1986年   4篇
  1985年   4篇
  1984年   10篇
  1983年   2篇
  1981年   3篇
  1980年   3篇
  1979年   2篇
  1978年   2篇
  1976年   2篇
  1975年   1篇
  1974年   2篇
  1973年   1篇
  1970年   1篇
排序方式: 共有426条查询结果,搜索用时 15 毫秒
61.
This article examines the traces of Protestantism in contemporary French history and political culture. After contextualising the legacies of Protestantism and Catholicism and recalling the latter's primary role in conceptions of French identity, the study focusses on how Protestant cultural influences came to bear. The article weighs the contributions of renowned Protestant historians and politicians, in the case of the latter, right down to the contemporary period.  相似文献   
62.
The appearance of rich and diverse funerary practices is one of the hallmarks of the Late Epipalaeolithic Natufian in the Levant. Numerous burials at a number of sites excavated mostly in the Mediterranean zone of the southern Levant have fed into the interpretation of the Natufian as a sedentary society of complex hunter-gatherers. Here, we report on the human remains recovered from Shubayqa 1, a well-dated early to late Natufian site in northeast Jordan. The majority of the minimum of 23 individuals that are represented are perinates and infants, which represents an atypical population profile. Ground stone artifacts and traces of colorants are associated with some of these individuals, providing a rare insight into funerary treatment of subadults in Natufian contexts. We interpret the Shubayqa 1 evidence in the light of current and ongoing debates concerning Natufian burial practices and the issue of social complexity.  相似文献   
63.
Ross H. Cordy. A Study of Prehistoric Social Change: The Development of Complex Societies in the Hawaiian Islands. New York: Academic Press, 1981. xii + 274 pp. $29.00  相似文献   
64.
65.
66.
67.
Fragments of fluorite (CaF2) have been found at five Belgian Upper Paleolithic sites (Spy, Chaleux, Trou Magritte, Trou du Frontal and Verlaine caves), primarily of Magdalenian age. These sites are located in a large geographical area. The aim of this study is to isolate one or more primary sources where the mineral could have been quarried prehistorically, and hence try to deduce if time and effort were put into obtaining it, or if it was simply a useful nearby raw material. In order to achieve this objective, isotopic 87Sr/86Sr and REE ratios are used. A total of four archaeological samples from the Chaleux, Spy and Trou Magritte sites along with geological samples were analyzed (new results and data from the literature), obtained from two distinct stratigraphical units in Belgium: the Givetian limestones (mainly from the Calestian Band), and the Dinantian limestones.  相似文献   
68.
Wyse Jackson, P.N., Reid, C.M. & McKinney, F.K., iFirst article, 2011. Fixation of the type species of the genus Protoretepora de Koninck, 1878 (Bryozoa, Fenestrata). Alcheringa, 1–2. ISSN 0311-5518.

The type species of the Palaeozoic bryozoan genus Protoretepora de Koninck, 1878 was originally fixed as Fenestella ampla Lonsdale in Darwin, 1844, but this taxon has been shown to belong to the bryozoan genus Parapolypora Morozova & Lisitsyn, 1996 Morozova, I. P. and Lisitsyn, D. V. 1996. Revision of the genus Polypora. Paleontologicheskii Zhurnal, 1996(4): 3847. [English translation: Paleontological Journal30(5), 530–541] [Google Scholar]. The original type species designation for Protoretepora de Koninck, 1878 is set aside, and in accordance with Article 70.3 of the International Code of Zoological Nomenclature (4th edition, 1999) the nominal species Protoretepora crockfordae Wyse Jackson, Reid & McKinney, 2011 from the Permian of Tasmania, Australia is herein fixed as the type species.  相似文献   
69.
Hampe, O., Witzmann, F. & Asbach, P., 2014. A benign bone-forming tumour (osteoma) on the skull of a fossil balaenopterid whale from the Pliocene of Chile. Alcheringa 38, xxx–xxx. ISSN 0311–5518.

A pathology of the fossil baleen whale ‘Megapterahubachi from the early Pliocene of Chile is described. It is a bony outgrowth on the left side of the supraoccipital, which is interpreted as a benign bone-forming tumour (osteoma). This diagnosis is based on X-ray imaging and CT scans of the abnormal bone, revealing a homogeneously dense internal structure with no evidence for lytic areas. The osteoma described here in ‘Megaptera’ hubachi is the first unequivocal evidence of a bone tumour in a cetacean, fossil or extant.

Oliver Hampe [] and Florian Witzmann [], Museum für Naturkunde, Leibniz-Institut für Evolutions- und Biodiversitätsforschung, Invalidenstraße 43, D-10115 Berlin, Germany; Patrick Asbach [], Institut für Radiologie, Charité—Universitätsmedizin Berlin, Charitéplatz 1, D-10117 Berlin, Germany. Received 28.8.2013, revised 7.11.2013, accepted 12.11.2013.  相似文献   
70.
The so-called footnote period in the 1980s is a controversial era in the history of Danish foreign policy. This article shows how footnote policy was not restricted to the North Atlantic Treaty Organization (NATO) area; rather, it reflected a wider parliamentary practice whereby footnotes and parliamentary resolutions were also used as strategies to impose Social Democratic preferences on the official European Economic Community (EEC) positions of the otherwise right-of-centre government. The article provides a nuanced analysis of the policy making in that period, arguing that the relative importance of different explanatory factors in the literature changed in the period 1982–1986. For instance, support is found for the transnational thesis that the Scandilux security-policy forum had some importance in determining the Social Democratic position, especially during negotiations on the Single European Act (SEA) in 1985. In other periods, short-term electoral concerns played a role, for instance in December 1985 and January 1986. However, the Social Democratic positions on the institutional questions in the 1982–1985 period were remarkably stable and could be interpreted as an attempt to maintain internal party cohesion.  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