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971.
The objective of this project was to investigate the trends of changes in the crystal morphology of cocaine in the presence of the common adulterants, caffeine and lidocaine HCl. By performing gold chloride microcrystal tests on samples of cocaine with adulterants at 10, 20, and 50% concentrations, trends in the changes of the crystal morphology can be linked to specific adulterants and concentrations. For cocaine/caffeine mixtures, the trend is elongation of one axis, additional branching, and brown discoloration of the crystals. At 50:50 cocaine/caffeine mixtures, branched spherical crystals and long needles appear. The trends for cocaine/lidocaine mixtures include elongation of one axis with an X-shaped middle axis. The axes continue to grow and branching decreases until at 50%, spherical clusters of needles appear. These results indicate microcrystal analysis can be used as a novel method for presumptively identifying not only cocaine but also the identity and concentration of the adulterant. 相似文献
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973.
Cassandra L. Kisiel Tracy Fehrenbach Elizabeth Torgersen Brad Stolbach Gary McClelland Gene Griffin Kristine Burkman 《Journal of family violence》2014,29(1):1-14
Patterns of trauma exposure and symptoms were examined in a sample of 16,212 children in Illinois child welfare. Data were collected on trauma histories, child and caregiver needs and strengths, and analyzed in light of the proposed Developmental Trauma Disorder diagnostic criteria. Youth exposed to both interpersonal violence and attachment-based (“non-violent”) traumas within the caregiving system had significantly higher levels of affective/physiological, attentional/behavioral, and self/relational dysregulation in addition to posttraumatic stress symptoms compared to youth with either type of trauma alone or in relation to other trauma experiences. These complexly traumatized children exhibited higher levels of functional impairment and were more likely to have placement disruptions and psychiatric hospitalizations. Findings suggest a developmental trauma framework can more adequately capture the spectrum of needs of these multiply traumatized youth than existing diagnostic formulations. Utilizing this framework for assessment, treatment planning, and intervention can lead to more targeted and effective services for these children. 相似文献
974.
Achieving public participation often is a goal for public budgeting entities, but it is difficult to accomplish in practice. This study examines three questions: How do public representatives interpret and define their democratic responsibilities? What are their insights regarding opportunities for and barriers to participatory budgeting processes? To what extent are these goals met? To address these questions, this research employs a qualitative research strategy with a case study design of a public university budgeting committee. The findings reveal that respondents (1) define their mission structurally and procedurally, (2) identify a need for ethical behavior and leadership, and (3) recognize that democratic values such as participation and efficiency are in tension with one another. Being open and inclusive comes in the form of the citizen–public administrator dialectic and requires intellectual, ethical, and practical engagement with competing democratic values. 相似文献
975.
The purpose of this study was to conduct a longitudinal examination of predictors of sexual aggression among male juvenile offenders. Four hundred and four adolescent males between the ages of 14 and 17 years were recruited from juvenile probation offices to take part in a prospective study of substance use and sexual risk. At baseline, participants completed a series of questionnaires that assessed putative risk factors for sexual aggression. They then completed a measure of sexual aggression at the 6-month follow-up period. Correlational analyses revealed that participants who reported hard drug use, more frequent alcohol and marijuana use, and less severe offenses reported engaging in more severe sexual aggression. In addition, participants who reported higher impulsivity, sensation seeking, and externalizing behaviors also reported participating in more severe sexual aggression. When these variables were included in a regression analysis, only externalizing behaviors and severity of offense uniquely predicted severity of sexual aggression at the 6-month follow-up. 相似文献
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977.
978.
Research on trends in partner violence has primarily relied on official measures of victimization focusing primarily on women's risk for intimate partner homicide. The current study uses 28 years of data from the National Crime Victimization Survey (NCVS) to examine the trends of intimate partner violence against female victims and identify variation in women's risk as a function of race and employment. Although it has been theorized that employment is correlated with the risk of intimate partner victimization for women, research has not thoroughly addressed this in a longitudinal context. In addition, research has not explored the extent to which intimate partner violence is correlated with the combined variables of race and employment. The authors find that between 1980 and the mid-2000s employment is associated with an increase in women's risk for intimate partner violence. However, the conclusion that the rate of victimization is higher for employed women appears to be partly contingent on the victims' race. The trend for non-White unemployed women appears to be relatively comparable to both White and non-White employed women, at least for the first 15 years of the series. 相似文献
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980.