论文部分内容阅读
there be用法小结
【出 处】
：
中学英语园地：高一版
【发表日期】
：
2006年2期
其他文献
The chemical forms, spatial distribution and sources of As, Hg, Cd, Pb and Zn in sediments of the Miyun reservoir were studied. The results of sequential extrac
Reticulate dunes are one of the commonest dune types, and yet the least understood. Reticulate dunes at southeastern Tengger Desert are constituted by NE-SW tre
There have been a number of investigations for examining the possible link between long-term climate variability and solar activity. A continuous δ18O record o
Effect of the slightly inclined terrain on the stably stratified steady-state atmosphere at the lowe
Under the assumptions that the ground surface is an unbound inclined rough plane and that the wind direction changes less than 20 degrees below z/h【0.2, the un
Water relation characteristics of the desert legume Alhagisparsifolia were investigatedduring the vegetation period from April to September 1999 in the foreland
By using a single-year discrimination chronology detrended from a δ13C chronology from Chinese pine (Pinus tabulaeformis) tree rings and meteorological data, t
The elevation of embryonic Xizang Plateau is reconstructed by the research on planation surfaces to be 500-1 500m a.s.l. The formation age of main surface of 19
Crude oil as carrier of gold: petrological and geochemical evidence from Lannigou gold deposit in so
Organic matter is related closely to mineralization of Lannigou gold deposit in southwestern Guizhou, China, Regionally, the distribution of organic carbon agre
Several typical exinites in China including alginite, cultinite, suberinite and bituminite are analysed by means of 13C high solution solid state CP MAS TOSS NM
Regional fractures and denudation of gold ore deposits in Gangdise block, Tibet: Evidence of Ag/Au v
Mapping with Ag/Au ratios of mineralized rocks and ores as a parameter reveals that the deep fractures in the Gangdise block control the distribution of the hig