全文获取类型
收费全文 | 4716篇 |
免费 | 146篇 |
专业分类
各国政治 | 152篇 |
工人农民 | 213篇 |
世界政治 | 312篇 |
外交国际关系 | 178篇 |
法律 | 3138篇 |
中国政治 | 24篇 |
政治理论 | 822篇 |
综合类 | 23篇 |
出版年
2023年 | 37篇 |
2021年 | 26篇 |
2020年 | 57篇 |
2019年 | 76篇 |
2018年 | 103篇 |
2017年 | 97篇 |
2016年 | 115篇 |
2015年 | 68篇 |
2014年 | 89篇 |
2013年 | 412篇 |
2012年 | 114篇 |
2011年 | 135篇 |
2010年 | 94篇 |
2009年 | 120篇 |
2008年 | 117篇 |
2007年 | 118篇 |
2006年 | 123篇 |
2005年 | 82篇 |
2004年 | 102篇 |
2003年 | 111篇 |
2002年 | 86篇 |
2001年 | 209篇 |
2000年 | 207篇 |
1999年 | 149篇 |
1998年 | 61篇 |
1997年 | 60篇 |
1996年 | 54篇 |
1995年 | 52篇 |
1994年 | 59篇 |
1993年 | 52篇 |
1992年 | 118篇 |
1991年 | 106篇 |
1990年 | 132篇 |
1989年 | 121篇 |
1988年 | 136篇 |
1987年 | 129篇 |
1986年 | 100篇 |
1985年 | 106篇 |
1984年 | 81篇 |
1983年 | 71篇 |
1982年 | 52篇 |
1981年 | 47篇 |
1980年 | 40篇 |
1979年 | 50篇 |
1978年 | 36篇 |
1976年 | 30篇 |
1975年 | 28篇 |
1974年 | 39篇 |
1973年 | 28篇 |
1970年 | 27篇 |
排序方式: 共有4862条查询结果,搜索用时 19 毫秒
261.
The goal of the present study was to determine the relationship between substance use, drug selling, and lethal violence in adolescent male homicide offenders and their victims. The study employed a retrospective review of criminal justice databases and medical examiner records for murders committed by 25 adolescent males incarcerated in the Commonwealth of Virginia juvenile correctional centers from February 1992 to July 1996. The perpetrator sample was 84% African American and 16% white. The average age at the time of the offense was 15.0 years (range = 13.0 to 17.7 years). The victims were 84% male, 60% African American and 32% white. The median victim age was 28.0 years (mean = 34.8, range = 17 months to 75 years). The results indicated that 52% of the murders were committed by juveniles with identified involvement in drug selling, and 28% of the murders were drug-related. Toxicology results indicated recent drug or alcohol use in 27% of the victims; while 74% of the perpetrators reported substance use, 35% indicating daily use. Using discriminant analysis, it was possible to accurately classify 86% of the drug-related murders with the variables of recent victim drug use and perpetrator substance use history. The results indicated that adolescent males involved in the sale and distribution of illegal drugs comprised a significant percentage of those incarcerated for murder. Recent victim drug use and perpetrator substance use may be important variables in identifying drug-related juvenile homicides. These results underscore the link between substance use, drug selling, and lethal violence. 相似文献
262.
Tahir MA Balraj E Luke L Gilbert T Hamby JE Amjad M 《Journal of forensic sciences》2000,45(4):902-907
A body was exhumed from the ground after 27 years. Samples of femur bone, tooth, and a fingernail were collected and successfully subjected to DNA extraction, quantitation, amplification, and subsequently typed for DQA1, polymarker, and nine STR loci. All three types of samples were typed for D3S1358, vWA, FGA, D8S1179, D21S11, D18S51, D5S818, D13S17, D7S820, and amelogenin using ABI Prism 377 DNA sequencer. 相似文献
263.
Sturner WQ Herrmann MA Boden C Scarritt TP Sherman RE Harmon TS Woods KB 《Journal of forensic sciences》2000,45(4):908-910
State Supreme Courts require a minimum threshold of reliability and acceptance in the scientific community for all medical and similar evidence to be admitted at trial. In Florida and some other states, the courts adhere to what is known as the Frye standard, whereas in most states and in Federal Courts, it is the so-called Daubert standard. The jurisdiction of the present case is Hillsborough County (Tampa), Florida. Forensic pathologists seldom, if ever, are requested to participate in such hearings, unlike their toxicological and basic science colleagues who are more involved in research methodology and technical procedures. The burden is on the proponent of the evidence to prove the general acceptance of both the underlying scientific principle of the test and procedures used to apply that principle to the facts of the case at hand. The trial judge has the sole discretion to determine this question and general acceptance must be established by a preponderance of the evidence. The authors describe in detail a hearing in a case in which they were all involved. One author (WQS) had researched and documented the original scientific methodology in the literature. The situation involved a car and tractor trailer crash with the two occupants of the car dying of multiple trauma, whereas the truck driver was not injured. Autopsy of the auto driver revealed multiple injuries with exsanguination, and only vitreous humor and liver tissue, but not blood, were tested for ethyl alcohol. The estate of the driver of the automobile brought suit against the owner of the trucking company for wrongful death. The plaintiff requested a Frye hearing to question the reliability of testing other body specimens to translate to probable blood alcohol level. The testimony, submitted documents, and eventual decision by the judge are discussed. 相似文献
264.
Inayama Y Udaka N Amano T Watanuki Y Odagiri S Kawano N Nakatani Y 《Journal of forensic sciences》2000,45(2):478-482
We report a fatal case of death due to unusual aspiration of sardine fry in an elderly Japanese man with lung cancer. The cause of death was sudden respiratory arrest while eating. Autopsy revealed peculiar materials with cell nests and pigmented particles, together with striated muscle and skin, in the ectatic bronchioles of the left lower lobe. Serial histologic sections suggested that the structures observed were the eyeballs of small animals that appeared to have been inhaled. The patient had habitually eaten sardine fry and rice gruel, which were also detected in the gastric contents. Therefore, the eyes were considered to be those of the fry, which is a popular food item in Japan. This was confirmed by histologic examination of fry that were obtained commercially. 相似文献
265.
266.
Lemmens T 《McGill law journal. Revue de droit de McGill》2000,45(2):347-412
This article discusses the desirability of legislation focusing on genetic discrimination, in particular in the context of insurance. Many American states and some European countries as well as the Council of Europe have introduced protective measures against discrimination on the basis of genetic susceptibility. The author questions their effectiveness and queries whether they may be inequitable, because they fail to address more fundamental underlying issues related to the nature of insurance, access to health care, and unequal distribution of wealth. There is also a problem of definition in these statutes. They fail to capture what constitutes genetic information. Nonetheless, the author argues it is important to consider the social consequences of genetic testing. Michael Walzer's theory of justice is used to examine the role of insurance and health care. Using this approach, the author finds the American system of distribution for health care to be problematic. This is then used to inform the author's discussion of the future of health care in Canada. Anti-discrimination provisions could be used in a way that is consistent with Walzer's theory of justice. They would encompass both genetic and non-genetic health factors. These can be modelled on current anti-discrimination statutes in Canada. The author then proposes administrative committee structures to regulate the use of genetic data in Canada. 相似文献
267.
Simonov EA Sorokin VI Drozdov MA Kimstach TB Liubetskiĭ GV Vershtskaia GV 《Sudebno-meditsinskaia ekspertiza》2000,43(3):23-28
A protocol for comparative analysis of heroin making use of chromatographic methods and infra-red spectroscopy is presented. 相似文献
268.
Campman SC Holmes JF Sokolove PE Romero JA Yost BA Lie JT 《The American journal of forensic medicine and pathology》2000,21(1):69-73
Arterial fibromuscular dysplasia (FMD) represents a collection of noninflammatory and nonatherosclerotic vascular diseases with a poorly understood etiology. Classically occurring in renal and cerebral arteries, this entity has also been reported in coronary, carotid, and other medium and small arteries. One case occurring in the pulmonary vasculature has been reported. Fatal hemothorax and lung hemorrhage have multiple causes, including other vascular malformations and connective tissue disorders; however, cases of pulmonary FMD are exceedingly rare. We report what appears to be the second such association, occurring in a 69-year-old man. The patient presented with a 3-week history of increasing dyspnea, fatigue, and productive cough; 3 days of increasing back and chest pain; and syncope. Chest radiograph showed a "white-out" of the left lung. The patient died shortly after admission from a fulminant respiratory disease of undetermined etiology. At autopsy he was found to have a massive left hemothorax resulting from an unsuspected pulmonary arterial fibromuscular dysplasia. 相似文献
269.
Mallak CT Milch KS Horn DF 《The American journal of forensic medicine and pathology》2000,21(1):79-82
The diagnosis of sudden infant death syndrome (SIDS) has been an enigma to medical examiners and coroners for decades. The recent drastic decrease in the number of SIDS cases has been associated with infants sleeping supine instead of prone. The apparent relation between sleeping position and SIDS has led to the marketing of several positioning sleep aids. We report a case of the improper use of one such device which resulted in the death of an infant. 相似文献
270.
Vogel JS Parker JR Jordan FB Coury TL Vernino AR 《The American journal of forensic medicine and pathology》2000,21(3):264-269
The authors report a fatal case of a Persian leopard (Panthera pardus) attack in an animal sanctuary in Oklahoma. The victim was a 53-year-old Costa Rican woman who was attempting to feed the animal when she was attacked and killed. Autopsy, radiography, fingerprint analysis, microbiologic cultures, and dental impressions were used to evaluate the case. These simple techniques can be applied to similar cases involving wild and domestic animal attacks. 相似文献