全文获取类型
收费全文 | 601篇 |
免费 | 20篇 |
专业分类
各国政治 | 42篇 |
工人农民 | 69篇 |
世界政治 | 28篇 |
外交国际关系 | 36篇 |
法律 | 307篇 |
中国政治 | 10篇 |
政治理论 | 127篇 |
综合类 | 2篇 |
出版年
2023年 | 5篇 |
2022年 | 5篇 |
2021年 | 7篇 |
2020年 | 12篇 |
2019年 | 32篇 |
2018年 | 33篇 |
2017年 | 19篇 |
2016年 | 28篇 |
2015年 | 17篇 |
2014年 | 23篇 |
2013年 | 110篇 |
2012年 | 27篇 |
2011年 | 27篇 |
2010年 | 16篇 |
2009年 | 17篇 |
2008年 | 20篇 |
2007年 | 24篇 |
2006年 | 27篇 |
2005年 | 22篇 |
2004年 | 19篇 |
2003年 | 13篇 |
2002年 | 14篇 |
2001年 | 9篇 |
2000年 | 4篇 |
1999年 | 2篇 |
1998年 | 6篇 |
1997年 | 5篇 |
1996年 | 7篇 |
1995年 | 7篇 |
1993年 | 5篇 |
1992年 | 2篇 |
1991年 | 4篇 |
1989年 | 5篇 |
1988年 | 4篇 |
1987年 | 3篇 |
1986年 | 7篇 |
1984年 | 4篇 |
1983年 | 2篇 |
1982年 | 3篇 |
1977年 | 2篇 |
1976年 | 4篇 |
1975年 | 1篇 |
1974年 | 3篇 |
1973年 | 1篇 |
1972年 | 1篇 |
1971年 | 1篇 |
1970年 | 1篇 |
1969年 | 1篇 |
1968年 | 4篇 |
1967年 | 1篇 |
排序方式: 共有621条查询结果,搜索用时 10 毫秒
561.
Fracture and dislocation of major joints may be caused by the forceful tonic muscular contractions of seizure activity. A 77-year-old man who was found dead in bed with no sign of external trauma had bilateral central fracture dislocations of the femoral head through the acetabular floor with fatal pelvic hemorrhage and extensive pulmonary fat and bone marrow embolism. He had epilepsy, but the last seizure was 6 years earlier, and he had long discontinued medication. The fractures were attributed to a new unwitnessed seizure. This is the twentieth case of central fracture dislocation of the hip since 1970, when better anesthesia eliminated convulsive therapy-induced fractures. The authors review these 20 cases. Seizures followed inflammation, infarction or neoplasia of the brain, eclampsia, metabolic or iatrogenic causes, or epilepsy (6 cases, 2 of which had no prior seizures for 5 years). There were 11 men (mean age, 64 years) and 9 women (mean age, 47 years). Fractures were unilateral in 13 and bilateral in 7. Additional fractures (in vertebrae, shoulders, or femur) were present in eight. Only eight had prior bone disease. Local symptoms led to diagnosis in most, but two were identified incidentally on imaging. The current patient was the only one to die suddenly, but six other patients presented with shock and three died (one of whom had injuries that led to a suspicion of manslaughter). Central fracture-dislocation of the hip is a rare and little known consequence of seizures, with strong potential for misdiagnosis and lethal complications. 相似文献
562.
’My Mother Resides in the Beating Artery …’: Engendering Voices for Medieval and Early Modem Studies
Heather Kerr 《澳大利亚女权主义者研究》1997,12(25):150-152
Elizabeth D. Harvey, Ventiloquized Voices: Feminist Theory and English Reniassance Texts (Routledge) London and New York, [1992 rpt], 1995.
Andrew Lynch and Philippa Maddern (eds), Venus and Mars: Engendering Love and War in Medieval and Early Modem Europe (University of Western Australia Press) Nedlands, 1995. 相似文献
563.
564.
565.
566.
Perceptions of children's credibility were studied in two experiments wherein participants watched a videotape of a 4- to 5- or a 6- to 7-year old child report details of a play session that had been experienced once (single-event) or was the last in a series of four similar play sessions (repeat-event). The child's report was classified as high or low accurate. In Experiments 1 and 2, reports of repeat-event children were judged to be less believable on several measures. In Experiment 1, younger children were viewed as less credible than older children. In both experiments, neither undergraduates nor community members correctly discriminated between high- and low-accurate reports. Content analysis in Study 3 revealed the relationship between age and event frequency and children's credibility ratings was mediated by the internal consistency of children's reports. Recent research on children's reports of instances of repeated events has identified several challenges facing children who report repeated abuse. These data bring to light another potential difficulty for these children. 相似文献
567.
568.
Katy L. Shepherd B.S. Heather Walsh‐Haney Ph.D. Marta U. Coburn M.D. 《Journal of forensic sciences》2010,55(1):237-240
Abstract: The Food and Drug Administration does not require surgical sutures to be tracked by manufacturer, physician, or patient; thereby, surgical sutures have been of little use to forensic practitioners who are tasked with establishing a positive identification with biological evidence. This study demonstrates the investigative process used to pinpoint suture manufacturers by presenting a case where surgical sutures were a distinctive characteristic that aided in the positive identification of skeletal remains. The suture’s manufacturer, construction material and structure, size, and medical use was determined by contacting a local surgical suture and orthopedic implant manufacturer and utilizing publicly available manufacturer websites, which provide catalogs and specific product details. This research was one of many lines of evidence used to establish the positive identification of a 47‐year‐old male. 相似文献
569.
Helen W. Kreuzer Ph.D. Jon H. Wahl Ph.D. Candace N. Metoyer Ph.D. Heather A. Colburn Ph.D. Karen L. Wahl Ph.D. 《Journal of forensic sciences》2010,55(4):908-914
Abstract: Samples containing the toxic castor bean protein ricin have been recently seized in connection with biocriminal activity. Analytical methods that enable investigators to determine how the samples were prepared and to match seized samples to potential source materials are needed. One commonly described crude ricin preparation method is acetone extraction of crushed castor beans. Here, we describe the use of solid‐phase microextraction and headspace analysis to determine whether castor beans were processed by acetone extraction. We prepared acetone‐extracted castor bean mash, along with controls of unextracted mash and mash extracted with nonacetone organic solvents. Samples of acetone‐extracted mash and unextracted mash were stored in closed containers for up to 109 days at both room temperature and ?20°C, and in open containers at room temperature for up to 94 days. Acetone‐extracted bean mash could consistently be statistically distinguished from controls, even after storage in open containers for 94 days. 相似文献
570.
In this paper we use a size and industry matched sample of over 1,900 UK and US businesses for the period 2004–05 in the manufacturing
and business services sectors to analyse the relative “strength” of the university–industry ecosystems in which these firms
operate in the two economies. Our analysis shows that in both countries universities per se play a quantitatively smaller
role as a source of knowledge for business innovation than either the business sector itself or a variety of organisations
intermediating between the university and business sectors. Our analysis reveals a much more diffuse university–industry ecosystem
in the UK in which a higher proportion of businesses claim links external to themselves in their pursuit of knowledge for
innovation and a higher proportion report directly connecting with universities. US firms are more likely to access knowledge
through a combination of business and intermediary sources and are less likely to have established formal collaborative or
partnership agreements in the 3 years prior to the survey. We also find, however, that a higher proportion of US firms place
a very high value on the connections they have with universities and are much more likely to commit resources to support such
innovation related university interactions. A similar pattern of diffuse but weaker links characterise the supply of public
sector financial assistance for innovation in our sample firms. UK firms are more likely to be in receipt of assistance, but
receive far less per firm in absolute terms and relative to their R&D expenditures. It appears that the UK university–industry
ecosystem is characterised by a greater width than quality of interaction. 相似文献