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本文从植物遗传改良等因素比较了肯尼亚与中国的茶产业.中国茶区辽阔,生态条件多样化,各地分别适宜种植不同类型的茶树品种;而肯尼......

In less than two decades,especially in response to Chinas renewed engagement in Africa at the dawn of twenty-first centu......

该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生......

The present paper examines the changing climatic scenarios and associated effects on livestock farming (pastoralism) in ......