全文获取类型
收费全文 | 431篇 |
免费 | 16篇 |
专业分类
各国政治 | 27篇 |
工人农民 | 64篇 |
世界政治 | 32篇 |
外交国际关系 | 33篇 |
法律 | 176篇 |
中国政治 | 8篇 |
政治理论 | 101篇 |
综合类 | 6篇 |
出版年
2023年 | 3篇 |
2022年 | 2篇 |
2021年 | 3篇 |
2020年 | 6篇 |
2019年 | 8篇 |
2018年 | 18篇 |
2017年 | 21篇 |
2016年 | 17篇 |
2015年 | 13篇 |
2014年 | 11篇 |
2013年 | 69篇 |
2012年 | 11篇 |
2011年 | 11篇 |
2010年 | 12篇 |
2009年 | 9篇 |
2008年 | 10篇 |
2007年 | 22篇 |
2006年 | 20篇 |
2005年 | 10篇 |
2004年 | 8篇 |
2003年 | 11篇 |
2002年 | 17篇 |
2001年 | 9篇 |
2000年 | 7篇 |
1999年 | 3篇 |
1998年 | 8篇 |
1997年 | 4篇 |
1996年 | 6篇 |
1995年 | 10篇 |
1994年 | 4篇 |
1993年 | 3篇 |
1992年 | 6篇 |
1991年 | 5篇 |
1990年 | 2篇 |
1989年 | 7篇 |
1988年 | 7篇 |
1987年 | 2篇 |
1986年 | 3篇 |
1985年 | 3篇 |
1984年 | 2篇 |
1983年 | 3篇 |
1982年 | 6篇 |
1981年 | 7篇 |
1980年 | 2篇 |
1978年 | 2篇 |
1977年 | 3篇 |
1976年 | 2篇 |
1975年 | 5篇 |
1974年 | 6篇 |
1967年 | 2篇 |
排序方式: 共有447条查询结果,搜索用时 15 毫秒
31.
This study examined the perceived social, behavioral, and health effects of phencyclidine (PCP) use among a sample of 200 users in northern California. The study population, generated through snowball sampling techniques, included heavy chronic, light chronic, and recreational users; the vast majority of subjects were not in treatment facilities. Subjects reported that PCP use—particularly long-term, extensive use—resulted in frequent disruption of education and employment, impairment of relationships with parents and with lovers or spouses, involvement with the criminal justice system, and deterioration of physical and mental health. These findings provide systematic documentation of the extent to which problems previously associated with PCP use occurred among this population of users. In addition, the results illustrate the importance of examining the effects of PCP use in light of the psychosocial developmental processes of adolescence and early adulthood.This research was supported by Research Grant No. DA02293 from the National Institute on Drug Abuse.Received M.S. in psychology from California State University, Hayward.Received Ph.D. from University of Iowa. 相似文献
32.
Diane Ellen Papalia-Finlay 《Journal of youth and adolescence》1978,7(2):133-139
In the present study a two-part animism questionnaire was devised and administered to 200 female undergraduate students who had fairly extensive course backgrounds in science. When these students were asked to classify each of 15 objects as living or nonliving, 67% (N=134) gave evidence of apparent animistic thought. Yet when the subjects were asked to choose which of several statements reflected their own definition of living, 66% (N=132) claimed that only plants and animals are living. Scientific background did not relate to performance on either section of the questionnaire. Results indicate that although the primary orientation of many young adults toward the word living is not a biological one, most college students areable to classify stimuli according to this criterion.Received her Ph.D. in lifespan developmental psychology from West Virginia University in 1971. Primary research interest is cognitive functioning after childhood. 相似文献
33.
Ellen H.Palanca 《东南亚纵横》2001,(11):24-24
自从1979年中国实行改革开放以来,菲中两国的经济关系持续发展。菲律宾对华贸易要比它与世界其他国家的贸易增长得更快。近几年来,我们可以看到,由于菲律宾比素对人民币的比值相对较低,菲律宾对华出口骤增。尽管中国在菲律宾外贸总额中所占的份额已经由80年代的2%增长到现在的4%,但总的来说仍然偏少。 当前的菲中贸易结构以工业制成品为主体。正如其整体贸易结构一样,菲律宾的对华出口贸易以半成品为主。中国的工业制品则包含更多的制成品——电子产品、金属制品和建筑材料。近几年,在中国对菲律宾出口中消费品、食品及食… 相似文献
34.
35.
Esther S. Chang Jutta Heckhausen Ellen Greenberger Chuansheng Chen 《Journal of youth and adolescence》2010,39(11):1293-1304
This study proposed and confirmed three ways in which college students can perceive shared agency and two ways in which they can perceive non-shared agency with parents when pursuing educational goals in college. Differences and similarities were examined among participants
from four ethnic backgrounds (N = 515; 67% female): East Asian American, Southeast Asian American, Filipino/Pacific Islander American, and European American.
Results indicated that Asian American youth reported higher levels of non-shared agency with parents (i.e., parental directing
and noninvolvement), lower levels of shared agency (i.e., parental accommodation, support, or collaboration), and poorer college
adjustment compared to European Americans. However, ethnic similarities were found whereby perceived shared agency in education
with parents was associated with college adjustment. Multiple mediation analyses also indicated that our model of shared and
non-shared agency with parents explained differences in college adjustment between Asian and European Americans, though more
strongly for comparisons between European and East Asian Americans. Our results suggest that parents continue to be important
in the education of older youth but that continued directing of youth’s education in college can be maladaptive. 相似文献
36.
Jess Alderman Jason A. Smith Ellen J. Fried Richard A. Daynard 《The Journal of law, medicine & ethics》2007,35(1):90-112
Childhood obesity is in important respects a result of legal policies that influence both dietary intake and physical activity. The law must shift focus away from individual risk factors alone and seek instead to promote situational and environmental influences that create an atmosphere conducive to health. To attain this goal, advocates should embrace a population-wide model of public health, and policymakers must critically examine the fashionable rhetoric of consumer choice. 相似文献
37.
Ingrid Sharp 《Women's history review》2014,23(3):347-364
German women were working within a context strikingly different from either the USA or the UK following the granting of suffrage in 1918. Focusing on the largest of the bourgeois women's organisations, the Federation of Women's Associations (Bund Deutscher Frauenvereine, BDF), this article situates the post-suffrage strategies and priorities of the German women's movement within their particular national context. The BDF have been accused of failing to fully utilise the vote as a tool for change, but a study of their journal, Die Frau, shows that it was the weight of external factors that reduced the BDF's impact, rather than any failure of courage or commitment by the women. An overview of German press coverage of female suffrage before, during and after the war sets out the mental landscape within which the women were operating and gives for the first time a much-needed indication of public response to the issue. 相似文献
38.
A key goal of housing assistance programs is to help lower income households reach neighborhoods of opportunity. Studies have described the degree to which Low-Income Housing Tax Credit (LIHTC) developments are located in high-opportunity neighborhoods, but our focus is on how neighborhood outcomes vary across different subsets of LIHTC residents. We also examine whether LIHTC households are better able to reach certain types of neighborhood opportunities. Specifically, we use new data on LIHTC tenants in 12 states along with eight measures of neighborhood opportunity. We find that compared with other rental units, LIHTC units are located in neighborhoods with higher poverty rates, weaker labor markets, more polluted environments, and lower performing schools, but better transit access. We also find that compared with other LIHTC tenants, poor and minority tenants live in neighborhoods that are significantly more disadvantaged. 相似文献
39.
Managing incidental findings in human subjects research: analysis and recommendations. 总被引:8,自引:8,他引:0
Susan M Wolf Frances P Lawrenz Charles A Nelson Jeffrey P Kahn Mildred K Cho Ellen Wright Clayton Joel G Fletcher Michael K Georgieff Dale Hammerschmidt Kathy Hudson Judy Illes Vivek Kapur Moira A Keane Barbara A Koenig Bonnie S Leroy Elizabeth G McFarland Jordan Paradise Lisa S Parker Sharon F Terry Brian Van Ness Benjamin S Wilfond 《The Journal of law, medicine & ethics》2008,36(2):219-48, 211
No consensus yet exists on how to handle incidental findings (IFs) in human subjects research. Yet empirical studies document IFs in a wide range of research studies, where IFs are findings beyond the aims of the study that are of potential health or reproductive importance to the individual research participant. This paper reports recommendations of a two-year project group funded by NIH to study how to manage IFs in genetic and genomic research, as well as imaging research. We conclude that researchers have an obligation to address the possibility of discovering IFs in their protocol and communications with the IRB, and in their consent forms and communications with research participants. Researchers should establish a pathway for handling IFs and communicate that to the IRB and research participants. We recommend a pathway and categorize IFs into those that must be disclosed to research participants, those that may be disclosed, and those that should not be disclosed. 相似文献
40.
Previous findings have shown both beneficial and adverse effects of parents’ attempts to influence adolescents’ eating habits.
The current study examined the differential effect of parents’ persuasion (e.g., encouragement, giving information) and pressure
tactics (e.g., guilt induction, ridicule) and the moderating influence of parental warmth on older adolescents’ emotional
and behavioral responses. An ethnically diverse sample of 336 older adolescents (M age = 18.6; SD = 1.1; 58.0% female) were surveyed. Adolescents who reported higher levels of pressure tactics by parents reported more negative
affect and behavioral resistance. Perceived parental warmth moderated the influence of persuasion tactics, but not pressure
tactics. For adolescents with low parental warmth, high levels of persuasion were associated with more negative emotional
and behavioral responses; persuasion had the opposite associations for adolescents with high parental warmth. These results
suggest that parental warmth plays an important role in how older adolescents respond to parents’ persuasion tactics. However,
when parents use more forceful pressure tactics to influence eating habits, adolescents react negatively regardless of the
overall quality of the parent–adolescent relationship. 相似文献