全文获取类型
收费全文 | 1032篇 |
免费 | 1篇 |
专业分类
安全科学 | 22篇 |
废物处理 | 1篇 |
环保管理 | 89篇 |
综合类 | 794篇 |
基础理论 | 71篇 |
污染及防治 | 41篇 |
评价与监测 | 6篇 |
社会与环境 | 4篇 |
灾害及防治 | 5篇 |
出版年
2022年 | 7篇 |
2018年 | 4篇 |
2016年 | 6篇 |
2015年 | 5篇 |
2014年 | 7篇 |
2013年 | 45篇 |
2012年 | 7篇 |
2011年 | 7篇 |
2010年 | 8篇 |
2009年 | 5篇 |
2008年 | 7篇 |
2007年 | 5篇 |
2005年 | 3篇 |
2004年 | 3篇 |
2003年 | 12篇 |
2002年 | 8篇 |
1998年 | 12篇 |
1997年 | 4篇 |
1995年 | 57篇 |
1994年 | 51篇 |
1993年 | 38篇 |
1992年 | 32篇 |
1991年 | 26篇 |
1990年 | 33篇 |
1989年 | 26篇 |
1988年 | 34篇 |
1987年 | 31篇 |
1986年 | 21篇 |
1985年 | 14篇 |
1984年 | 12篇 |
1983年 | 14篇 |
1982年 | 11篇 |
1981年 | 5篇 |
1979年 | 5篇 |
1976年 | 6篇 |
1975年 | 9篇 |
1974年 | 4篇 |
1973年 | 10篇 |
1971年 | 4篇 |
1963年 | 3篇 |
1961年 | 3篇 |
1940年 | 2篇 |
1920年 | 2篇 |
1919年 | 47篇 |
1918年 | 44篇 |
1917年 | 36篇 |
1916年 | 53篇 |
1915年 | 37篇 |
1914年 | 71篇 |
1913年 | 106篇 |
排序方式: 共有1033条查询结果,搜索用时 31 毫秒
71.
72.
B. Fullerton Dr R. C. Wilkinson Jeremy Howells Naima Chabbis M. F. Downing 《Journal of Environmental Planning and Management》1986,29(2):98-100
URBANIZATION AND COMMUNITY BUILDING IN MODERN NORWAY
J. S. Tortenson, M. F. Metcalfe, T. F. Rasmussen
Urbana Press, Oslo 1985. 312 pp., figs and tables.
REGIONAL DEVELOPMENT POLICY
R. Riddell
Gower, 1985. £18.50
REVIEW OF SERVICE INDUSTRIES: A GEOGRAPHICAL APPRAISAL
P. W. Daniels
Methuen, 1985. £27.50.
ARABIC‐ISLAMIC CITIES: BUILDING AND PLANNING PRINCIPLES
Besim Selim Hakim
KPI Ltd., London, 1986. pp. 192. £46 (h/b)
FIFTY YEARS OF LANDSCAPE DESIGN
Sheila Harvey and Stephen Rettig
The Landscape Press, 1985. £12.50
CAPABILITY BROWN AND THE EIGHTEENTH CENTURY ENGLISH LANDSCAPE
Roger Turner
Weidenfeld & Nicholson. £16.95. 相似文献
73.
The future supplies of iron ore, coking coal and ferrous scrap are discussed. There is no likelihood of the resources of iron ore being exhausted until well into the twenty-first century. Coking coal, on the other hand, is in shorter supply but it is being eked out by blending with non-coking coal and by making blast furnaces more efficient. Briquettes made completely from non-coking coal will play a part in iron making in the future. To ensure greater flexibility in steel making, hydrocarbons are being considered as possible substitutes for coal. Scrap has always played an important part in steel making and the amount recycled is increasing every year. But more effort is needed, for example, to ensure that the steel in car scrap is fully utilised and that refuse is efficiently recycled. Steel making increasingly demands the scrap to have few impurities and to be in uniform sized pieces. A cryogenic method of preparing such scrap is described. A futuristic way of extracting iron, non-ferrous metals and other saleeable by-products from refuse, by using redundant blast furnaces, is also discussed. 相似文献
74.
75.
76.
77.
78.
79.
Dr E. Vamos D. Pratola N. Van Regemorter M. Freund J. Flament-Durand F. Rodesch 《黑龙江环境通报》1985,5(3):209-214
Amniocentesis was performed in view of a paternal balanced chromosomal rearrangement t(4;20)(p16;p12), inv(18)(p11q11). The pregnancy was complicated by severe oligohydramnios. The fetal karyotype was unbalanced: 46XX, der(4), t(4;20)(p16;p12), inv(18) (p11q11)pat., thus resulting in partial trisomy 2Op and monosomy 4p. In addition, the amniotic fluid alpha-fetoprotein (AFP) became increasingly elevated with gestational age. The pregnancy was terminated at 25 weeks. The fetus presented with typical facial dysmorphic features, unilateral cleft lip and palate, severe renal hypoplasia, consistent with the 4p- (Wolf-Hirschhorn) syndrome. 相似文献
80.
Using the polymerase chain reaction (PCR), it was possible to amplify a single copy fragment of the β-globin gene from 2–32 human embryonic cells obtained from arrested preimplantation embryos. For the detection of β-thalassaemia mutations, allele specific priming of the PCR using nested primers was employed using approximately 10 pg of DN A from individuals known to carry these mutations. This approach was successful in detecting the presence or absence of five Asian Indian β-thalassaemia mutations that were selected for this study. In spite of meticulous precautions against contamination, false-positive amplification was observed, a problem that will have to be overcome before this approach can be used in clinical practice. 相似文献