全文获取类型
收费全文 | 1177篇 |
免费 | 60篇 |
专业分类
各国政治 | 90篇 |
工人农民 | 123篇 |
世界政治 | 98篇 |
外交国际关系 | 61篇 |
法律 | 587篇 |
中国共产党 | 2篇 |
中国政治 | 10篇 |
政治理论 | 264篇 |
综合类 | 2篇 |
出版年
2023年 | 7篇 |
2022年 | 6篇 |
2021年 | 9篇 |
2020年 | 31篇 |
2019年 | 44篇 |
2018年 | 61篇 |
2017年 | 66篇 |
2016年 | 66篇 |
2015年 | 35篇 |
2014年 | 57篇 |
2013年 | 183篇 |
2012年 | 38篇 |
2011年 | 46篇 |
2010年 | 44篇 |
2009年 | 43篇 |
2008年 | 40篇 |
2007年 | 49篇 |
2006年 | 28篇 |
2005年 | 40篇 |
2004年 | 34篇 |
2003年 | 49篇 |
2002年 | 37篇 |
2001年 | 16篇 |
2000年 | 18篇 |
1999年 | 8篇 |
1998年 | 14篇 |
1997年 | 15篇 |
1996年 | 13篇 |
1995年 | 12篇 |
1994年 | 8篇 |
1993年 | 12篇 |
1992年 | 7篇 |
1991年 | 10篇 |
1990年 | 8篇 |
1989年 | 11篇 |
1988年 | 7篇 |
1987年 | 10篇 |
1986年 | 7篇 |
1985年 | 6篇 |
1984年 | 3篇 |
1983年 | 3篇 |
1982年 | 3篇 |
1980年 | 6篇 |
1979年 | 3篇 |
1978年 | 6篇 |
1977年 | 2篇 |
1976年 | 3篇 |
1974年 | 4篇 |
1967年 | 1篇 |
1963年 | 1篇 |
排序方式: 共有1237条查询结果,搜索用时 31 毫秒
61.
Maria Donald Jayne Lucke Michael Dunne Beverley Raphael 《Journal of youth and adolescence》1995,24(4):453-464
The differences between male and female adolescents' emotional reactions to their most recent occasion of sexual intercourse were examined. The sample included 932 sexually active Australian secondary school students who completed a self-report questionnaire concerning their sexual behavior. The majority of young people reported that they felt happy or good following their most recent occasion of sex. Females were more likely than males to report negative emotions such as feeling bad and used, but there was no difference between the percentage of males and the percentage of females who reported feeling guilty. Girls were more likely to feel bad, used, or guilty last time if they were drunk/high or had sex with someone who was not a steady partner. Boys who had sex with someone other than a steady partner last time were more likely to feel guilty. Peer and parental influences were also associated with feelings of guilt. Girls who were more confident that they could talk to one of their parents/guardians about sex, and boys who believed that most of their peers were sexually active, were less likely to have felt guilty.Received B.A. (Hons) from University of Queensland. Research interests include adolescents mental and sexual health.Received B.A.(Hons) from University of Queensland. Interested in the areas of sex roles and sexual behavior among adolescents.Received Ph.D. from Murdoch University. Research interests include population studies of sexual behavior and mental health.Received M.B.B.S., M.D. from University of Sydney. Research interests include adolescent health, psychological response in disasters, coping with grief and loss and living with HIV/AIDS. 相似文献
62.
63.
The global self-esteem of adolescents was examined in relation to two aspects of their daily lives: (a) the perceived quality of their relationships with parents and peers; and (b) their self-evaluation in the areas of school, popularity, and athletics. The quality of relationships with parents made significant contributions to the explained variance in self-esteem of both boys and girls. The quality of peer relationships made a significant additional contribution for girls but not boys. The importance of parent and peer relationships to self-esteem did not vary as a function of age for either sex. Self-evaluation of popularity was related to girls' global self-esteem, while evaluation of school performance was more important for boys.Received her Ph.D. from George Peabody College. Research interests include adolescent stress and coping, and parent-child relationships.Received his M.D. from Medical College of Georgia. Research interests include stress, eating disorders, and pregnancy in adolescents. 相似文献
64.
65.
Salzberger LA Cavuoti D Barnard J 《The American journal of forensic medicine and pathology》2002,23(4):382-385
Salmonellae most commonly cause uncomplicated cases of gastroenteritis but have a predilection for damaged blood vessels, especially those damaged by atherosclerosis. The abdominal aorta is most frequently affected. The most serious complication of aortitis is mycotic aneurysm formation with subsequent rupture. The authors present the case of a 61-year-old man who was found unresponsive at home 3 days after discharge from the hospital for treatment of gastroenteritis with bacteremia. Postmortem examination revealed a ruptured mycotic aneurysm with a large retroperitoneal hematoma. Numerous gram-negative rods were embedded in the wall of the aorta and surrounding inflammatory infiltrate, compatible with the patient's previously isolated. Whereas abdominal aortic aneurysm rupture is most commonly associated with atherosclerosis, the isolation of from blood cultures, coupled with radiographic evidence of gas surrounding the aorta, should raise the suspicion of infectious aortitis. Whereas fatal rupture of an aortic aneurysm secondary to atherosclerosis alone or in conjunction with aortitis will not have an impact on the manner of death, infections are reportable and thus have public health implications. 相似文献
66.
The identification of sodium fluoroacetate (compound 1080) employing NMR spectroscopy 总被引:1,自引:0,他引:1
Nuclear magnetic resonance (NMR) spectroscopy was employed for the purpose of identifying samples of materials suspected of containing sodium fluoroacetate (Compound 1080). Acquisition of routine proton (1H) and carbon (13C) NMR spectra provided a straight-forward means for determining the presence of Compound 1080 in the samples and thus afforded a simple method for analysis and identification of this compound. 相似文献
67.
Baptista MJ Monsanto PV Pinho Marques EG Bermejo A Avila S Castanheira AM Margalho C Barroso M Vieira DN 《Forensic science international》2002,128(1-2):66-78
A sensitive analytical method was developed for quantitative analysis of delta(9)-tetrahydrocannabinol (delta(9)-THC), 11-nor-delta(9)-tetrahydrocannabinol-carboxylic acid (delta(9)-THC-COOH), cannabinol (CBN) and cannabidiol (CBD) in human hair. The identification of delta(9)-THC-COOH in hair would document Cannabis use more effectively than the detection of parent drug (delta(9)-THC) which might have come from environmental exposure. Ketamine was added to hair samples as internal standard for CBN and CBD. Ketoprofen was added to hair samples as internal standard for the other compounds. Samples were hydrolyzed with beta-glucuronidase/arylsulfatase for 2h at 40 degrees C. After cooling, samples were extracted with a liquid-liquid extraction procedure (with chloroform/isopropyl alcohol, after alkalinization, and n-hexane/ethyl acetate, after acidification), which was developed in our laboratory. The extracts were analysed before and after derivatization with pentafluoropropionic anhydride (PFPA) and pentafluoropropanol (PFPOH) using a Hewlett Packard gas chromatographer/mass spectrometer detector, in electron impact mode (GC/MS-EI). Derivatized delta(9)-THC-COOH was also analysed using a Hewlett Packard gas chromatographer/mass spectrometer detector, in negative ion chemical ionization mode (GC/MS-NCI) using methane as the reagent gas. Responses were linear ranging from 0.10 to 5.00 ng/mg hair for delta(9)-THC and CBN, 0.10-10.00 ng/mg hair for CBD, 0.01-5.00 ng/mg for delta(9)-THC-COOH (r(2)>0.99). The intra-assay precisions ranged from <0.01 to 12.40%. Extraction recoveries ranged from 80.9 to 104.0% for delta(9)-THC, 85.9-100.0% for delta(9)-THC-COOH, 76.7-95.8% for CBN and 71.0-94.0% for CBD. The analytical method was applied to 87 human hair samples, obtained from individuals who testified in court of having committed drug related crimes. Quantification of delta(9)-THC-COOH using GC/MS-NCI was found to be more convenient than GC/MS-EI. The latter may give rise to false negatives due to the detection limit. 相似文献
68.
Freddie Ssengooba Lynn Atuyambe Barbara McPake Kara Hanson Sam Okuonzi 《公共行政管理与发展》2002,22(5):415-428
The policy of hospital autonomy has been discussed for some time in Uganda. There is little evidence from Uganda or elsewhere that increased autonomy will improve hospital performance. This article compares the performance of three private not‐for‐profit (PNFP) and public hospital pairs to address this question. PNFP and public hospitals have similar management structures but PNFP hospitals had better trained managers and a church affiliated chair in the hospital management committee. Both types have problems with personnel management but these appear more pronounced in public hospitals. Drug supply management appears better in PNFP hospitals. Overall, workloads are similar, but analysis of patterns of utilisation and prices across services suggest that patient choice of facilities is influenced by relative price levels, and that willingness to pay is higher for PNFP services. PNFP hospitals are more successful at generating revenue. There are no clear differences in efficiency between PNFP and public hospitals but there is some evidence of higher quality levels in PNFP hospitals. PNFP hospitals' performance is plausibly related to three areas of managerial autonomy. First, better management of drug supply is facilitated by their freedom to purchase drugs from the open market. Second, greater success with personnel management is plausibly related to their greater autonomy over staffing. Third, higher levels of cost recovery are enabled by their freedom to set fees. However, differences in accountability and competence of hospital management, and population willingness to pay for services may also help to explain differences. Further, the use of PNFP financing strategy by public hospitals has implications for universal access to hospital services. Although there appear to be potential advantages from greater public hospital autonomy, the Ugandan government should ensure it has developed strategies to enhance public hospital management and to protect access to public hospitals before advancing further with hospital autonomy policy. Copyright © 2002 John Wiley & Sons, Ltd. 相似文献
69.
70.
Kelly?N.?GravesEmail author Maria?E.?Fernandez Terri?L.?Shelton James?M.?Frabutt Amanda?P.?Williford 《Journal of youth and adolescence》2005,34(4):379-387
The purpose of this study was to increase the knowledge base of adolescent substance use by examining the influences of risk and protective factors for specific substance use, namely alcohol, cigarettes, and marijuana. Participants included 271 adolescents and their primary caregivers referred for mental health services across North Carolina. A series of hierarchical multiple regressions showed that the relative influences of risk and protective factors differed depending on the target substance in some cases. History of parental felony predicted use of all 3 substances, although the direction of association was substance specific. Parental behavioral control (how families express and maintain standards of behavior) was predictive only of cigarette and marijuana use, not alcohol use. The different links among risk factors, protective factors, and specific substance use are discussed, and recommendations for both mental health and substance use professionals are offered.She received her M.A. in Psychology from Wake Forest University and is currently a doctoral student in Clinical Psychology at the University of North Carolina at Greensboro. Her major research interests include developmental pathways to aggressive behavior among females.An evaluator for the North Carolina Department of Health and Human Services, her major research interests include system of care intervention programming.She received her PhD in Clinical Psychology from Purdue University. Her major research interests include developmental psychopathology and early intervention.His research interests focus on youth violence and youth involved with the juvenile justice system.She received her PhD in Clinical Psychology from the University of North Carolina at Greensboro. Her research interests focus on early intervention with young children. 相似文献