右图所示对果�进行环割�皮的实验请据图回答提示果�的的韧皮部位于�皮内1在ab处环割后该枝条的蒸腾作用并没有受到影响原因 Template




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tomski右图所示对果�进行环割�皮的实验请据图回答提示果�的的韧皮部位于�皮内1在ab处环割后该枝条的蒸腾作用并没有受到影响原因 coloring