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   1452篇
  免费   307篇
  2021年   17篇
  2020年   20篇
  2019年   108篇
  2018年   73篇
  2017年   77篇
  2016年   132篇
  2015年   89篇
  2014年   93篇
  2013年   300篇
  2012年   91篇
  2011年   99篇
  2010年   82篇
  2009年   53篇
  2008年   78篇
  2007年   73篇
  2006年   51篇
  2005年   25篇
  2004年   42篇
  2003年   32篇
  2002年   25篇
  2001年   24篇
  2000年   31篇
  1999年   4篇
  1998年   16篇
  1997年   17篇
  1996年   13篇
  1995年   16篇
  1994年   14篇
  1993年   3篇
  1992年   4篇
  1991年   3篇
  1989年   3篇
  1987年   4篇
  1986年   3篇
  1985年   3篇
  1983年   3篇
  1982年   6篇
  1980年   3篇
  1979年   3篇
  1978年   2篇
  1977年   6篇
  1976年   2篇
  1975年   1篇
  1974年   4篇
  1973年   1篇
  1971年   1篇
  1969年   1篇
  1968年   2篇
  1960年   1篇
  1951年   1篇
排序方式: 共有1759条查询结果,搜索用时 15 毫秒
81.
82.
83.
84.
85.
We present the palaeopathological analysis of a right fourth metatarsal (ATD6‐124) recovered from the Atapuerca–Gran Dolina site (Spain). This fossil, ca. 1 Ma, belongs to Homo antecessor, the earliest known European hominin species. The metatarsal exhibits a proliferative lesion on its medial periosteal surface. Periosteal reaction can be the bone response to a wide number of injurious processes. We describe a lesion on the basis of macroscopic and microscopic analyses, including microtomography and scanning electron microscopy. Externally, the osteoblastic lesion presents a highly porotic and disorganised morphology. Internally, we observe a series of micro‐fractures on the compact bone that do not affect the medullary canal. We provide a differential diagnosis and suggest that the ATD6‐124 lesion could correspond to a pedal stress fracture, also known as fatigue or march fracture. Stress fractures have been related to a load increase and muscular fatigue. This type of fracture has been widely reported in the foot of soldiers and athletes, which are usually engaged in strenuous, excessive or prolonged locomotive activities. Despite its high frequency in these groups, stress fractures have not been reported as such in fossil collections, with the exception of a metatarsal belonging to the Sima de los Huesos site (Atapuerca). Copyright © 2013 John Wiley & Sons, Ltd.  相似文献   
86.
Current methods of sexing archaeological cattle bones, in particular the metapodials, are based upon past research into contemporary breeds and this work embraces a limited sample size, spread across a vast geographical area. Although the separation of cows and bulls is not in question, there appears a great deal of subjectivity in the literature concerning the identification of castrated beasts. Living bone is in a dynamic state of equilibrium with the rest of the body and responds to increased loading, that is, an increase in weight of the beast or stress/strain through strenuous movement, by remodelling. If cows and oxen are performing the same work, as for example in ploughing, then loading on the bones will be similar. These bones will thus respond by remodelling in corresponding fashion, and hence any morphological and metrical distinctions will be clouded. Horn-cores are less subject to these constraints, although in some cultures there may be loading on these bones, for example through attaching the harness to the horns for ploughing. The Chelmsford cattle horn-cores constitute waste from some industrial activity and it is argued in the text that horn-working is the most likely candidate, together with possibly tanning. Sexing of the bones strongly indicated male animals, with few females being present. A procedure for detecting castrated cattle (oxen) is presented, the results of which suggest an equivalent ratio of oxen to bulls.  相似文献   
87.
Francis Bacon. By Perez Zagorin (Princeton, NJ: Princeton University Press, 1998) xvi + 286 pp. $29.95, £19.95

Francis Bacon: The History of the Reign of King Henry VII. Edited by Brian Vickers (Cambridge, UK: Cambridge University Press 1998) xlv + 284 pp. £40.00 cloth  相似文献   

88.
Beginning in the early 1950s, a series of epidemiological, biochemical, pathological, and animal studies demonstrated a link between cigarette smoking and lung cancer. A number of reputable scientists challenged these findings, but for a variety of reasons, including the behavior of the tobacco industry, historians have assumed that these objections were insubstantial and disingenuous. Viewing these objections in scientific and medical perspective, however, suggests that there was a legitimate and reasonable scientific controversy over cigarette smoking and lung cancer in the 1950s and early 1960s. That controversy had important consequences. A new chronic disease epidemiology emerged, transforming the role and importance of epidemiology to medical research. This new epidemiology supplemented Koch's postulates, establishing a statistical method that allowed for linking environmental factors to the etiology of chronic diseases. The 1964 report to the surgeon general, Smoking and Health, represented the denouement and codification of these developments. This reexamination of the scientific controversy over smoking in the 1950s and early 1960s provides an important context for understanding the subsequent public relations battles between the tobacco industry and public health after 1964.  相似文献   
89.
Book reviews     
CHINA

TANG KWOK‐LEUNG. Colonial State and Social Policy: social Welfare Development in Hong Kong 1842–1997. Lanham, MD: University Press of America, 1998. 192 pp. US$36.00, hardcover.

ZHENG YONGNIAN. Discovering Chinese Nationalism in China: modernity, Identity, and International Relations. Cambridge: Cambridge University Press, 1999. 208 pp. US$54.95, hardcover; US$19.95, paper.

STEVAN HARRELL, BAMO QUBUMO and MA ERZI (photographs by Zhong Dakun). Mountain Patterns, The Survival of Nuosu Culture in China. Seattle and London: University of Washington Press, 2000. Colour and black‐and‐white illustrations. No price given, paper.

PENG XIZHE with ZHIGANG GUO (eds). The Changing Population of China. Oxford: Blackwell Publishers, 2000. 312 pp. Figures, tables, index. £50.00, US$68.95, hardcover; £15.99, US$31.95, paper.

ROBERT S. ROSS (ed). After the Cold War: domestic Factors and U.S.‐China Relations. Armonk: M. E. Sharpe, 1998. xiv, 208 pp. Charts, figures, index. US$59.95, hardcover; US$22.95, paper.

PING CHEN. Modern Chinese: history and Sociolinguistics. Cambridge: Cambridge University Press, 1999. 229 pp. Introduction, tables, notes, references, index. US$59.95, hardcover; US$21.95, paper.

JAPAN, KOREA

MARK R. MULLINS. Christianity Made in Japan: a Study of Indigenous Movements. Honolulu: University of Hawai'i Press, 1998. 288 pp. Illustrations, preface, notes, bibliography, index. US$24.95, paper.

HIROSUKE KAWANISHI (ed). The Human Face of Industrial Conflict in Post‐war Japan. London: Kegan Paul International, 1999. 287 pp. Introduction, chronology of events, translation of Japanese organisational and statutory names, index. US$93.50, hardcover.

YUKIKO KOSHIRO. Trans‐Pacific Racisms and the US Occupation of Japan. New York: Columbia University Press, 1999. xi, 295 pp. US$21.50, paper.

PHYLLIS BIRNBAUM. Modern Girls, Shining Stars, the Skies of Tokyo: five Japanese Women. New York: Columbia University Press, 1999. 255 pp. US$29.00; UK£19.95, hardcover.

ROBIN M. LEBLANC. Bicycle Citizens: the Political World of the Japanese Housewife. Berkeley: University of California Press, 1999. 246 pp. US$14.95, paper.

SOUTH, WEST & CENTRAL ASIA

ROWENA ROBINSON. Conversion, Continuity and Change: lived Christianity in Southern Goa. New Delhi, Thousand Oaks, London: Sage Publications, 1998. 236 pp. £27.50, hardcover.

RAJAT GANGULY. Kin State Intervention in Ethnic Conflicts: lessons from South Asia. New Delhi: Sage Publications, 1998.266 pp. Map, notes, bibliography, index. Rs. 350, hardcover.

SOUTHEAST ASIA

DANNY UNGER. Building Social Capital in Thailand: fibers, Finance, and Infrastructure. Cambridge: Cambridge University Press, 1998. 227 pp. A$90.00, hardcover; A$29.95, paper.

JEFFREY R. VINCENT, ROZALI MOHAMED ALI and ASSOCIATES. Environment and Development in a Resource‐Rich Economy: Malaysia Under the New Economic Policy. Cambridge, MA: Harvard University Press, 1997. 364 pp. Foreword, preface, bibliography, index. US$46.95, hardcover; US$22.95, paper.

GENERAL ASIA

ANITA CHAN, B. J. TRIA KERKVLIET and J. UNGER (eds). Transforming Asian Socialism: China and Vietnam Compared. St. Leonards, NSW: Allen & Unwin, 1999. 240 pp. A$24.95, paper.

KURT W. RADTKE and J. A. STAM et al. (eds). Dynamics in Pacific Asia: conflict, Competition and Cooperation. London and New York: Kegan Paul International, 1998. 287 pp. US$110, hardcover.

YUE‐MAN YEUNG (ed). Urban Development in Asia: retrospect and Prospect. Hong Kong: Hong Kong Institute of Asia‐Pacific Studies, Chinese University of Hong Kong, 1998. 453 pp. Plates, introduction, notes, index. No price given, hardcover.  相似文献   

90.
This research aims at delineating the dietary practices in Central Italy during the Bronze Age. The study of food choices is a mean for investigating palaeoenvironmental agricultural and economic activities and social relationships, which have been little explored until now in Italy from this specific perspective. Recent researches have showed that the Middle Bronze Age is a crucial period of dietary changes in Italy. Following these first observations, we studied three Bronze Age sites in Tuscany and Latium: Grotta dello Scoglietto, Grotta Misa and Felcetone. Analyses of stable carbon, nitrogen and sulphur isotopes on 38 human and 22 animal collagen samples were performed. The results show three different dietary patterns. Data from Grotta dello Scoglietto (Early Bronze Age) indicate a high‐protein intake, with a probable consumption of fish. Additionally, sulphur results let us infer the presence of some non‐local people. Individuals from Felcetone (Initial phase of the Middle Bronze Age) show a terrestrial diet dominated by plant proteins, which suggests a low δ15N food intake, namely legumes, as well as C4 plant, such as millet. Finally, values from Grotta Misa (Middle Bronze Age) highlight a mixed terrestrial diet and the consumption of millet. Given the variety of the obtained results, we are able to conclude that the transition from the Early to the Middle Bronze Age represents a moment of change, which is reflected by the presence of different dietary patterns. Copyright © 2015 John Wiley & Sons, Ltd.  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