填空题Lignin is essential for the tree but it will make paper easy to break.____
填空题
Lignin is essential for the tree but it will make paper easy to break.____
参考解析
解析：
根据题干中的信息“essential for the tree和make paper easy to break”可以定位到D段。“Lignin eventually breaks down and releases acid products into the paper. This will weaken the bond between the cellulose fibers and the paper will become brittle and look rather brown and careworn.”提到木质素是木头的主要组成物，其作用是凝聚纤维素，但它会使纸张变得易碎，故匹配段落为D。
根据题干中的信息“essential for the tree和make paper easy to break”可以定位到D段。“Lignin eventually breaks down and releases acid products into the paper. This will weaken the bond between the cellulose fibers and the paper will become brittle and look rather brown and careworn.”提到木质素是木头的主要组成物，其作用是凝聚纤维素，但它会使纸张变得易碎，故匹配段落为D。
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