全文获取类型
收费全文 | 4745篇 |
免费 | 39篇 |
国内免费 | 38篇 |
专业分类
教育 | 2601篇 |
科学研究 | 675篇 |
各国文化 | 15篇 |
体育 | 1001篇 |
综合类 | 36篇 |
文化理论 | 15篇 |
信息传播 | 479篇 |
出版年
2024年 | 15篇 |
2023年 | 12篇 |
2022年 | 18篇 |
2020年 | 12篇 |
2019年 | 9篇 |
2016年 | 13篇 |
2015年 | 13篇 |
2014年 | 37篇 |
2013年 | 37篇 |
2012年 | 296篇 |
2011年 | 466篇 |
2010年 | 174篇 |
2009年 | 53篇 |
2008年 | 287篇 |
2007年 | 293篇 |
2006年 | 350篇 |
2005年 | 332篇 |
2004年 | 276篇 |
2003年 | 242篇 |
2002年 | 231篇 |
2001年 | 202篇 |
2000年 | 176篇 |
1999年 | 130篇 |
1998年 | 36篇 |
1997年 | 54篇 |
1996年 | 38篇 |
1995年 | 37篇 |
1994年 | 45篇 |
1993年 | 66篇 |
1992年 | 57篇 |
1991年 | 63篇 |
1990年 | 59篇 |
1989年 | 78篇 |
1988年 | 36篇 |
1987年 | 65篇 |
1986年 | 59篇 |
1985年 | 54篇 |
1984年 | 37篇 |
1983年 | 47篇 |
1982年 | 48篇 |
1981年 | 34篇 |
1980年 | 17篇 |
1979年 | 13篇 |
1977年 | 7篇 |
1959年 | 12篇 |
1958年 | 12篇 |
1957年 | 13篇 |
1956年 | 12篇 |
1955年 | 12篇 |
1954年 | 13篇 |
排序方式: 共有4822条查询结果,搜索用时 15 毫秒
101.
102.
103.
105.
Vertesi J 《Endeavour》2004,28(2):64-68
In their race to provide the ultimate guide to the moon, two 17th-century astronomers proposed lunar maps and nomenclatures that they hoped would gain international currency. But the names we use today were those proposed by the Jesuit, a friend of Galileo's persecutors, in a book whose purpose was to refute the Copernican system once and for all. We now believe that Riccioli was wrong about the universe, but why do we still use his nomenclature? The keys to this foundational visual debate in astronomical image-making are the moon maps themselves. 相似文献
106.
A century before the outbreak of bovine spongiform encephalopathy (BSE), Great Britain and North America grappled with pleuro-pneumonia - a disease in cattle that had equally maddening consequences. Towards the end of the 19th century, this condition was at the heart of a transatlantic trade dispute that lasted for decades and attracted the attention of livestock farmers, diplomats, shipping moguls, veterinarians, public health regulators and journalists the world over. Scientific controversy aggravated the situation when there were doubts about the scientific judgment of Privy Council veterinary officials, who were simultaneously conducting disease-diagnosis activities and pushing for tighter regulations at British ports. At this point, William Williams, principal of the New Veterinary College in Edinburgh, waded into this troubled arena. His strong convictions spawned a long-running disagreement with the British Government over the diagnoses of pleuro-pneumonia in cattle imported from the USA and Canada. 相似文献
108.
Kraft M 《Medical reference services quarterly》2007,26(1):27-35
Podcasts offer a way for medical professionals to listen to current information in medicine from an iPod, MP3 player, handheld device, or computer. As podcasts become more popular, libraries may be interested in integrating programs into the library collection. South Pointe Medical Library evaluated medical podcasts relevant to the scope of the library collection and explored methods for finding and organizing such programs in ways that are efficient for both the librarian and the patron. doi:10.1300/J115v26n01_03. 相似文献
109.
Jackson R Baird W Davis-Reynolds L Smith C Blackburn S Allsebrook J 《Health information and libraries journal》2007,24(2):95-102
OBJECTIVES: The objectives of this work were to identify the sources of information currently received, information-seeking behaviours, information requirements and preferences for future information provision amongst health and social care professionals providing care to children with health care needs. METHODS: Data were collected using a cross-sectional postal questionnaire survey. RESULTS: A wide range of information resources was reported as being available to professionals. However, a large proportion of respondents found it necessary to perform additional searches for information, suggesting that current resources were not satisfying their needs. The majority of professionals reported a preference for electronic formats, whilst a smaller proportion preferred hard copy materials. Participants promoted the use of informal networks as a means of support and exchange of information. CONCLUSION: Supplementing the information that is provided in electronic and hard copy formats, by enhancing informal networks, may be the most effective way of meeting the information needs of this group of professionals. 相似文献
110.
Objectives: To explore how the library service expectations and perceptions of users might differ across health‐related libraries as against major research libraries not operating in a medical context; to determine whether users of medical libraries demand better library service quality, because the inability of users to access needed literature promptly may lead to a patient who cannot be properly diagnosed, or a diagnosis that cannot be properly treated. Methodology: We compared LibQUAL+® total and subscale scores across three groups of US, Canadian and British libraries for this purpose. Results: Anticipated differences in expectations for health as other library settings did not emerge. Conclusions: The expectations and perceptions are similar across different types of health science library settings, hospital and academic, and across other general research libraries. 相似文献