论文部分内容阅读
本文通过对荣华二采区10<
对肉牛品种改良的几点建议
【摘 要】
：
本文通过对荣华二采区10
【机 构】
：
黑龙江省黑河市爱辉区奶牛场;
【出 处】
：
黑龙江科技信息
【发表日期】
：
2003年4期
其他文献
早在古时,蝗灾就经常肆虐我国北方地区,给当时的劳动生产带来了很大损失.近几年来非洲几次大蝗灾也都使当地人民损失惨重.但是蝗虫是如何迁徙、活动的,人类却对此几乎一无所
Influence of proximity to the Qinghai-Tibet highway and railway on variations of soil heavy metal co
本文通过对荣华二采区10
Relationship between ponding and topographic factors along the China?Russia Crude Oil Pipeline in pe
本文通过对荣华二采区10
A series of directional shear tests on remolded frozen soil was carried out at -10 °C by using a hollow cylinder apparatus to study failure criterion under a directional shear-stress path. Directional
Characteristics of climate and melt runoff in the Koxkar Glacier River Basin, south slope of the Tia
本文通过对荣华二采区10
Vegetation plays a significant role in global terrestrial ecosystems and in combating desertification. We analyzed vegetation change in Inner Mongolia of northern China using the Normalized Difference