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   11789篇
  免费   525篇
  2023年   57篇
  2020年   163篇
  2019年   227篇
  2018年   560篇
  2017年   491篇
  2016年   589篇
  2015年   278篇
  2014年   252篇
  2013年   2864篇
  2012年   331篇
  2011年   484篇
  2010年   484篇
  2009年   349篇
  2008年   336篇
  2007年   399篇
  2006年   240篇
  2005年   180篇
  2004年   153篇
  2003年   144篇
  2002年   156篇
  2001年   185篇
  2000年   156篇
  1999年   154篇
  1998年   122篇
  1997年   119篇
  1996年   109篇
  1995年   105篇
  1994年   89篇
  1993年   113篇
  1992年   99篇
  1991年   98篇
  1990年   82篇
  1989年   86篇
  1988年   73篇
  1987年   94篇
  1986年   83篇
  1985年   111篇
  1984年   117篇
  1983年   118篇
  1982年   100篇
  1981年   95篇
  1980年   105篇
  1979年   95篇
  1978年   101篇
  1977年   103篇
  1976年   108篇
  1975年   97篇
  1974年   67篇
  1973年   60篇
  1972年   60篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
951.
Isotopic, EPR and petrographic studies aimed at establishing the provenance of sculptural bigio antico are reported, including 18 possible quarry sites and 21 ancient sculptures. The results demonstrate that the Belevi quarry, north‐east of Ephesos, above the more famous white marble quarry, was the major source of this marble. Nineteen artefacts belong to Belevi, whereas the precise origin of the remaining two is unknown, but must probably be found within the same area. The peculiar distribution of δ13C values both for Belevi and artefacts was crucial for inferring the correct provenance, subsequently confirmed by additional analytical and petrographic data.  相似文献   
952.
The Lv family tombs in Lantian, Shaanxi Province are one of the most important archaeological sites of China in recent years, providing numerous objects and a wealth of information for the study of the history of the Northern Song dynasty. There were a large number of exquisite cultural relics unearthed from the tombs, including one porcelain box containing white powder, which was identified as women's makeup. The phase composition, microstructure, thermal properties and characteristics of the trace elements in the unearthed white cosmetic powder were comprehensively analysed by X‐ray diffraction (XRD), scanning electron microscopy (SEM), differential scanning calorimetry – thermogravimetry (DSC–TG), Fourier transform infrared (FT–IR) microscopy and inductively coupled plasma atomic emission spectroscopy (ICP–AES). The white makeup powder was determined to be a product made from high‐quality freshwater pearls. These results, for the first time, showed evidence that freshwater pearl powder was used as a cosmetic in ancient China using archaeological objects, providing scientific evidence and new clues to enrich and expand research into the ancient Chinese cosmetic materials.  相似文献   
953.
954.
Five Iron Age ceramic lamps from a tomb at the site of Sahab in the south‐eastern part of central Jordan were analysed using gas chromatography – mass spectrometry (GC–MS). The results of this study provide data on the type of fuel used in three of these lamps. The study proposes that animal fat, possibly of ruminant origin, was used in three Early Iron Age II lamps. The material used in the other two Iron Age I lamps could not be determined due to the absence of diagnostic biomarkers. The data obtained from the lamps can be put in conjunction with the archaeological evidence on the availability of domestic animals and, most probably, use of their products at the site of Sahab during the Iron Age.  相似文献   
955.
Dating is perhaps the most frequently asked question in rock art studies, but still one of the most difficult to answer. However, chronology is vital in order to understand and interpret rock art sites. Unfortunately, attempts at dating the Mikinak site, at Lake Wapizagonke, Quebec, Canada were unsuccessful. But a multi‐instrumental protocol applied to characterize paintings shows that at least three different paint recipes were employed to create the site. These may reflect three different phases of paintings, and that at least three different artists contributed to the production of this site.  相似文献   
956.
The aim of this paper is to investigate whether the ceramics from the Goguryeo fortified sites of the Han River region in central Korea were manufactured and consumed locally during the southern expansion of the Goguryeo State (475–551 ce ). For this research, 88 ceramic samples from seven contemporary sites in the southern territories of Goguryeo were sampled and analysed by ceramic thin‐section petrography and neutron activation analysis (NAA). In addition, to establish a possible chemical fingerprint at Hongryeonbong Fort 2, five clay specimens were also gathered and analysed from the pottery firing structure. The results of this analytical study indicate that the majority of the ceramics from the Goguryeo fortified sites of central Korea were produced and circulated within this newly acquired region. In addition, it is highly probable that Hongryeonbong Fort, which contains the remains of what may be ceramic firing architecture, is the place of production for the ceramics.  相似文献   
957.
958.
959.
960.
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