全文获取类型
收费全文 | 24905篇 |
免费 | 825篇 |
国内免费 | 5篇 |
专业分类
各国政治 | 924篇 |
工人农民 | 1136篇 |
世界政治 | 1612篇 |
外交国际关系 | 829篇 |
法律 | 15847篇 |
中国共产党 | 40篇 |
中国政治 | 263篇 |
政治理论 | 4784篇 |
综合类 | 300篇 |
出版年
2021年 | 139篇 |
2020年 | 342篇 |
2019年 | 376篇 |
2018年 | 520篇 |
2017年 | 605篇 |
2016年 | 629篇 |
2015年 | 494篇 |
2014年 | 499篇 |
2013年 | 2222篇 |
2012年 | 650篇 |
2011年 | 706篇 |
2010年 | 569篇 |
2009年 | 652篇 |
2008年 | 752篇 |
2007年 | 831篇 |
2006年 | 801篇 |
2005年 | 716篇 |
2004年 | 713篇 |
2003年 | 680篇 |
2002年 | 616篇 |
2001年 | 924篇 |
2000年 | 801篇 |
1999年 | 677篇 |
1998年 | 382篇 |
1997年 | 268篇 |
1996年 | 325篇 |
1995年 | 269篇 |
1994年 | 310篇 |
1993年 | 302篇 |
1992年 | 467篇 |
1991年 | 555篇 |
1990年 | 511篇 |
1989年 | 446篇 |
1988年 | 498篇 |
1987年 | 441篇 |
1986年 | 501篇 |
1985年 | 444篇 |
1984年 | 368篇 |
1983年 | 353篇 |
1982年 | 265篇 |
1981年 | 303篇 |
1980年 | 222篇 |
1979年 | 258篇 |
1978年 | 207篇 |
1977年 | 173篇 |
1976年 | 156篇 |
1975年 | 178篇 |
1974年 | 184篇 |
1973年 | 168篇 |
1969年 | 137篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
291.
One of the important resources to any state, such as California, is the technology that is available from the many federally operated and/or funded laboratories within its borders. In this age of technology a state needs to take advantage of applications of modern technology and innovative exploitation of human and natural resources. This article illuminates the importance of the Federal Government research laboratories. Many examples are presented to support the argument that the Federal Government research laboratories can be and often are substantial contributors to the storehouse of technology that finds its way to the private sector and public sector. Several types of technology transfer are discussed, i.e. primary technology, secondary applications, mission related, technical assistance and cooperative. In addition the article discusses the structure and logic of the Federal Laboratory Consortium for Technology Transfer (FLC). The legislaltion that has helped to make the FLC effective is discussed. Included in the discussion are insights of how the FLC operates and how the private sector and public sector may use the FLC in order to locate process, product and service technology. 相似文献
292.
D A Hawley J E Pless H Palmer 《The American journal of forensic medicine and pathology》1987,8(3):229-232
Atypical entrance gunshot wounds may be produced by deflected or ricocheting bullets. One special type of atypical entrance wound involves abrasion of the skin at a site that is remote from the point of dermal penetration. These remote abrasions, termed "tumbling abrasions," are produced by bullets that tumble after impact with an intermediate target. Three cases of tumbling abrasions are presented. 相似文献
293.
294.
Four unrelated hanging deaths involving young white males, all in enlisted status in the United States military, are presented. Taken in a military context, one scene served as a suicide note equivalent with the unmistakable message of extreme defiance toward military regulations. In two cases, the elaborate attire of the decedents could have lead to the misclassification of the manner of death if investigative information had not been considered. Extensive background investigation and review of medical records in the fourth case disclosed that the victim had an eight- to ten-year history of compressing his neck to cause unconsciousness. He left an extensive suicide note in which he concluded that "hanging would be good." Each case has certain unique features, as a group, the cases all demonstrate a continuum from obvious suicide to cases where the manner of death is, at first, equivocal. 相似文献
295.
The impact of health maintenance organizations and competition on hospitals in Minneapolis/St. Paul 总被引:1,自引:0,他引:1
The Healthcare Educational and Research Foundation (HERF) in Minneapolis undertook a two-year research project to study the effects of health maintenance organizations (HMOs) and competition on the hospital industry in Minneapolis/St. Paul. This article summarizes HERF's major findings surrounding three key questions: (1) do the HMOs in Minneapolis/St. Paul use fewer hospital resources relative to conventional payers?; (2) do recent overall community trends in inpatient use suggest evidence of hospital utilization-reducing effects attributable to HMOs?; and (3) given the highly visible competitive process among Minneapolis/St. Paul providers, do hospital cost and revenue data suggest any evidence of cost-containment? The findings (based on data through 1982) indicate that for comparable patients, Twin Cities HMOs appear to use fewer medical care resources per hospitalized patient. There was, however, no clear evidence of community-wide, utilization-reducing effects directly attributable to the "competitive effect" of HMO introduction and development in the market. In addition, there was no empirical evidence that HMOs (which had enrolled 25 percent of the consumer market by 1982), or other large buyers of inpatient services, have selected hospitals on the basis of price as hypothesized by competition advocates. 相似文献
296.
A R Copeland 《Zeitschrift für Rechtsmedizin》1986,96(4):291-296
A study of non-commercial accidental water transport (boating) fatalities was performed on the case files of the Office of the Medical Examiner of Metropolitan Dade County in Miami, Fla., during the years 1980-1984. A total of 23 cases were collected and analyzed as to the age, race, sex, and the cause of death of the victim along with the blood alcohol content and the Urine EMIT drug screen at autopsy. Furthermore, the type of boat involved, the geographic locale, the time of the incident, the reason or risk factor for the incident, and the scene circumstances were also noted. Commonly, one is dealing with a male population below the age of 30 years who die of drowning. In approximately half of the cases alcohol is detected. The scenario involves "small" boats or canoes in the Atlantic Ocean or in canals in the afternoon or evening. Inexperience in boating/or stupidity plays a key role. A discussion ensues concerning recommendations designed to avoid such tragedies. 相似文献
297.
The future of public health law 总被引:1,自引:0,他引:1
L O Gostin 《American journal of law & medicine》1986,12(3-4):461-490
Developments in medicine and constitutional law dictate modification of public health legislation in the United States. Traditionally overlooked by legislators, present public health laws provide inadequate decision-making criteria and inappropriate procedures for dealing with issues. Revised legislation should provide health care officials and agencies with the tools to balance individual rights against public health necessities. This Article makes four recommendations for legislative reform: (1) remove artificial legislative distinction between venereal and other communicable diseases; (2) provide criteria defining "public health necessity" to limit discretionary exercise of police power by health officials; (3) provide strong confidentiality protections in the collection and storage of public health information; (4) empower public health officials to select from a graded series of less restrictive alternatives in dealing with public health problems. 相似文献
298.
299.
P S Appelbaum A Meisel 《The Bulletin of the American Academy of Psychiatry and the Law》1986,14(3):221-230
The law governing the obligation of therapists to report their patients' previous criminal acts was reviewed. Most often, discussions of this subject fall under the general category of "misprison of a felony," that is, the presumed general obligation of all citizens to report felonies that come to their attention. Review of federal law revealed that the courts have consistently interpreted the federal misprision statute as requiring active concealment of a crime, not a mere failure to report, in order to convict for the offense. State law is more diverse. Only one state has a general misprison statute labeled as such, and several states have recently repealed such statutes. The strong trend in states without statutes is to reject misprison as a common law crime, because of its incompatibility with modern notions of justice. Most states, however, have limited reporting statutes, such as for child abuse or gunshot wounds, that impose similar obligations. Therapists' reporting of past crimes may be affected by clinical and ethical concerns, as well as by obligations to protect future victims. In almost all jurisdictions, however, the fear of prosecution for failure to report a past crime should not be a factor in deciding on a course of action. 相似文献
300.
Data examined in this study are from the 1976 Mexican Fertility Survey. The authors review previous findings and compare information from this survey with data from the 1969 PECFAL Survey. They then examine the types of consensual union and factors such as women's age, educational status, occupation, premarital fertility, and rural or urban residence. The focus of the study is on the extent to which consensual unions eventually become legal marriages. The authors also investigate the increasing probability of termination of marriage through divorce or separation, especially in urban areas. 相似文献