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Impact of Global Climatic and Environmental Changes on Agricultural Research Challenges and Wheat Pr
Food security is a human right,within a global context by aligning the opportunities to eliminate poverty,to attain the ......
Bolloás和Scott提出猜想:任意一个边数为m且最小度大于1的图存在顶点集的平衡二部划分使得每一部分点集的导出子图包含的边数......