全文获取类型
收费全文 | 680篇 |
免费 | 26篇 |
专业分类
各国政治 | 41篇 |
工人农民 | 71篇 |
世界政治 | 57篇 |
外交国际关系 | 25篇 |
法律 | 322篇 |
中国政治 | 10篇 |
政治理论 | 176篇 |
综合类 | 4篇 |
出版年
2022年 | 4篇 |
2021年 | 10篇 |
2020年 | 11篇 |
2019年 | 18篇 |
2018年 | 20篇 |
2017年 | 19篇 |
2016年 | 26篇 |
2015年 | 18篇 |
2014年 | 22篇 |
2013年 | 85篇 |
2012年 | 17篇 |
2011年 | 16篇 |
2010年 | 18篇 |
2009年 | 23篇 |
2008年 | 27篇 |
2007年 | 25篇 |
2006年 | 10篇 |
2005年 | 21篇 |
2004年 | 23篇 |
2003年 | 22篇 |
2002年 | 17篇 |
2001年 | 11篇 |
2000年 | 22篇 |
1999年 | 8篇 |
1998年 | 11篇 |
1997年 | 15篇 |
1996年 | 13篇 |
1995年 | 15篇 |
1993年 | 7篇 |
1992年 | 9篇 |
1991年 | 3篇 |
1990年 | 11篇 |
1989年 | 11篇 |
1988年 | 5篇 |
1987年 | 11篇 |
1986年 | 4篇 |
1985年 | 10篇 |
1984年 | 14篇 |
1983年 | 8篇 |
1982年 | 7篇 |
1981年 | 4篇 |
1980年 | 7篇 |
1979年 | 7篇 |
1978年 | 3篇 |
1977年 | 6篇 |
1976年 | 3篇 |
1974年 | 3篇 |
1972年 | 3篇 |
1969年 | 3篇 |
1968年 | 4篇 |
排序方式: 共有706条查询结果,搜索用时 515 毫秒
181.
Sandra C. Taylor 《Intelligence & National Security》2013,28(2):61-70
Women who fought the Americans and the South Vietnamese in the Vietnam War performed many tasks. Some were the usual women's work: nursing, providing food, shelter, repairing trails, and preparing ambushes. But, they also were useful as combatants and spies. Less obvious than men, they exchanged information on troop movements while at market. They were couriers, demonstrators and recruiters. They fought and also performed intelligence through ingenious strategems. One old woman cut off her hair, was half naked, and convinced the Southern troops that she was harmless; then she entered a base and gathered information that aided the NLF forces to defeat the enemy. The communist women were indeed a key to victory. 相似文献
182.
183.
184.
Much of the literature on expert testimony addresses ways to improve witness credibility. A smaller body of knowledge examines instances of testimony in which the expert makes stylistic or substantive errors. In the present paper, a case of expert testimony is presented in which an expert witness under the duress of strong cross-examinations lost emotional control and spoke inappropriately. The circumstances of the testimony are discussed and alternative paths towards managing such situations are presented. 相似文献
185.
186.
The goal of this study was to examine the relationship between family dysfunction and wanted, unwanted, and illegal sexual experiences that occurred during childhood and adolescence. Three hundred fifty-three subjects from a sexual abuse clinic, a family practice clinic, and a family planning clinic anonymously completed a survey on childhood sexual experiences and physical violence, family substance abuse, violence toward others, and family quality. Overall, 50% had had unwanted (USE) and wanted sexual experiences (WSE) before they turned 18. Subjects in the sexual abuse clinic had the highest percentage (90%) of unwanted or illegal sexual experiences, followed by the family planning subjects (40%) and the family practice subjects (30%). Both USE and WSE were related to family dysfunction scores, even when they were controlled for demographic influences. Family dysfunction scores were highest for those who reported USE and legal WSE and were lowest for those who reported no USE or WSE. 相似文献
187.
Simultaneous separation of different types of amphetamine and piperazine designer drugs by capillary electrophoresis with a chiral selector 总被引:1,自引:0,他引:1
Bishop SC McCord BR Gratz SR Loeliger JR Witkowski MR 《Journal of forensic sciences》2005,50(2):326-335
The recent emergence of a new class of piperazine-type compounds has brought about the need for laboratory screening methods for both seized drugs and toxicological samples. These piperazine compounds, which include 1-benzylpiperazine (BZP) and 1-(3-trifluoromethylphenyl)piperazine (TFMPP), exhibit comparable physiological effects and can be substituted for the classic amphetamine-type drugs. We have optimized a chiral capillary electrophoresis (CE) separation that detects a set of 6 piperazine and 4 chiral amphetamine compounds in under 23 min using a 200 mM phosphate buffer at a pH = 2.8 with 20 mM hydroxypropyl- beta-cyclodextrin (HPbeta3CD). In addition to the above compounds, a series of "clandestine" BZP diHCl samples were also analyzed using this method to assess the ruggedness of the procedure. The novel CE separation was tailored to simultaneously detect these piperzine compounds in addition to amphetamine-type drugs. Distinct migration time and UV-spectral data were obtained for all compounds of interest. 相似文献
188.
189.
Sánchez-Diz P Gusmão L Beleza S Benítez-Páez A Castro A García O Solla LP Geada H Martín P Martínez-Jarreta B de Fátima Pinheiro M Raimondi E Silva de la Fuente SM Vide MC Whittle MR Zarrabeitia MT Carracedo A Amorim A;GEP-ISFG 《Forensic science international》2003,135(2):158-162
A collaborative exercise was carried out by the Spanish and Portuguese ISFG Working Group (GEP-ISFG) in order to evaluate the performance of two Y-chromosome STR PCR tetraplexes, which include the loci DYS461, GATA C4, DYS437 and DYS438 (GEPY I), and DYS460, GATA A10, GATA H4 and DYS439 (GEPY II). The participating laboratories were asked to type three samples for the eight markers, using a specific amplification protocol. In addition, two control samples, with known haplotypes, were provided. The results obtained by the 13 different participating laboratories were identical, except for two laboratories that failed to type correctly the same two samples for GATA C4. By sequence analyses, two different GATA C4 allele structures were found. One control sample (allele 21) and two questioned samples (allele 22, correctly typed by all the laboratories, and allele 25) presented the following repeat structure: (TCTA)4(TGTA)2(TCTA)2(TGTA)2(TCTA)n, but different from the one found for allele 26 in one sample included in this exercise, as well as in the second control sample (allele 23), namely (TCTA)4(TGTA)2(TCTA)2(TGTA)2(TCTA)2(TGTA)2(TCTA)n. The collaborative exercise results proved that both Y-tetraplexes produce good amplification results, with the advantage of being efficiently typed using different separation and detection methodologies. However, since GATA C4 repeat presents a complex structure, with alleles differing in sequence structure, efficient denaturing conditions should be followed in order to avoid typing errors due to sizing problems. 相似文献
190.
Golding Jonathan M. Sanchez Rebecca Polley Sego Sandra A. 《Law and human behavior》1999,23(2):257-268
Two experiments investigated how mock jurors react to testimony involving claims of a repressed memory in a case involving child sexual assault. Participants read a fictional civil trial summary presented in one of three conditions: (a) immediate condition—the alleged victim testified immediately after the incident; (b) repressed condition—the alleged victim reported the assault 1–39 years later, after remembering it for the first time; or (c) not-repressed condition—the alleged victim reported the assault 1–39 years later, but the memory of the assault had been present for those years. When there was any type of delayed reporting, either the age of the alleged victim at the time of the assault was constant and her age at reporting varied (Experiment 1) or the age of the alleged victim at the time of the assault varied and her age at reporting remained constant (Experiment 2). The results showed that (1) a delay in reporting an incident adversely affected believability of the alleged victim and led to fewer rulings in support of the plaintiff compared to reporting it immediately, (2) longer delays in reporting generally led to lower alleged victim believability and fewer decisions in support of the plaintiff than shorter delays, (3) the age of the alleged victim at the time of the incident was a critical variable in determining belief of the alleged victim, and (4) men generally rated believability of the alleged victim lower and ruled in favor of the plaintiff less often than women. The results are discussed in terms of the psychosocial factors affecting the perception of delayed reporting in a child sexual assault trial. 相似文献