Rolling PlainsTexasNorthern bobwhite (Colinus virginianus) populations are monitored using 2 general approaches population indices and abundance estimators. Due to their convenient sampling designs, indices are commonly used by land managers and researchers to predict or estimate hunting-season populations....
根据第一段的句子“About one tenth of the total population are white; one-fourth are mixed Indians and white; and more than half are full-blooded Indians.(大约十分之一的人口是白人;四分之一是印第安人和白人的混血儿;其中一半以上是纯正的印第安人。)”可知,印第安人占玻利维亚人的绝大部分。故选A...
Bolivia has a population of three and a half million.About one tenth of the total population are white; one-fourth are mixed Indians and white; and more than half are full-blooded Indians.The government and the industries are under the control of the white people. The Indians today live in...
The country is made up of plains in the north and the southwest, but has mountains in the northeastern region. The two main mountain ranges are the Hindu Kush and the Pamir mountain ranges. The highest point in the country is Noshaq, which lies on the border between Afghanistan and ...
compared with that of white one : however, faster growth of black population there will lead eventually to white abandonment of suburban community.Without doubt, such new trends as mentioned above, seen during the 1970s, are highly connected with the new patterns of population change of that per...
Author information: (1)Department of Psychiatry, Weill-Cornell Institute of Geriatric Psychiatry, White Plains, New York, USA. GS Alexopoulos,BS Meyers,RC Young,... - 《Biological Psychiatry》 被引量: 2697发表: 1997年 Criterion validity of the Center for Epidemiologic Studies Depression scale (CE...
The eastern slopes ( 坡 ) of the Andes, since there are very few roads there, are fertile( 富饶的 ) but not highly developed . The two primary means of transportation are river boats and porters. East of the hill regions are the great plains where tropical ( 热带的 ) plants are grown...
Aegilops tauschii, the diploid wild progenitor of the D subgenome of bread wheat, is a reservoir of genetic diversity for improving bread wheat performance and environmental resilience. Here we sequenced 242 Ae. tauschii accessions and compared them to t
Dr. Wissler then stated that the birth-rate of the Plains Indians would appear to be the highest hi the world, being 48 per thousand. The white birth-rate, even before the depression, had sunk to 20 per thousand. He went on to point out that when the Indian was first placed on ...
Contrary to recent literature that portrays the High Plains as an over-exploited region of economic and demographic decline and as place that should be dep... SE White - 《Annals of the Association of American Geographers》 被引量: 88发表: 1994年 The Macroeconomics of Zimbabwe in the 1980s:...