【摘 要】
:
In southwestern China, karst rocky desertification, a process of land degradation, takes place widely due to human impacts on the fragile karstic ecological sys
【出 处】
:
Chinese Journal of Geochemistry
论文部分内容阅读
In southwestern China, karst rocky desertification, a process of land degradation, takes place widely due to human impacts on the fragile karstic ecological systems, which includes soil erosion, extensive exposure of basement rocks, and drastic decrease i
In southwestern China, karst rocky desertification, a process of land degradation, takes place widely due to human impacts on the fragile karstic ecological systems, which includes soil erosion, extensive exposure of basement rocks, and drastic decrease i
其他文献
Two most common inorganic oxidation states of arsenic in the natural environments are arsenate, As (Ⅴ), and arsenite, As (Ⅲ). Arsenite is of more environmenta
随着西部铁路的开发和连续梁技术的发展,其施工技术日趋完善。结合兰新二线甘青段深山峡谷地形条件受限情况下连续梁边跨直线段的施工,介绍特殊地形条件下,边跨直线段使用托
今年第一季度我国国内生产总值达到23562亿元人民币,与去年同期相比增长高达9.9%,比去年的增长率高出2.3个百分点,是1997年以来增长最快的一个季度。在伊拉克战争的阴影笼罩,
患者女,58岁.因右下腹痛行阑尾切除时发现大网膜转移性腺癌1周于2003年6月人院.查体:浅表淋巴结无肿大,右下腹触及边界不清质偏硬包块,直肠指检和妇科检查无明显异常.CT:右下腹片状不规则阴影,与腹壁浸润,右侧盆腔结节状低密度阴影,盆底少量积液,余未见异常。
去年的电子产品进出口贸易呈现以下三个特点: (1) 电子产品进出口贸易是拉动我国经济增长的重要力量,是进出口额增长最快的行业: (2) 外贸中高技术、新产品和电子信息产品增
Based on the analytical data of over 30 gas samples, combined with geochemical and geological backgrounds, the composition and distribution characteristics of s
1996年王星宏高考落榜后,进山学起了打石头。当王星宏成为一名优秀石匠的时候,公路修通了,村民修屋建房不再用原来的石条石板,改用水泥沙石,王星宏的致富梦碎了。
Wang Xing
By analyzing the digital tilt tidal observations at Yongsheng station and strain tidal observations at Houma station, this paper suggests that the solid tidal f
11月29日晚从“白玉兰戏剧奖”获奖演员与上海戏迷大联欢现场回来,我和天津京剧团文武老生王平等获奖演员按事先约定,一起到上海文艺会堂底楼餐厅,就着陈剑英老师事先点好的
目的 探讨非小细胞肺癌 p6 3基因的蛋白表达水平及其与定位在 3号染色体 2 7~ 2 9区域改变的关系。 方法 应用比较基因组杂交 (CGH)技术对 70例原发性肺鳞状细胞癌和肺腺癌