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本文从以下几个角度介绍。

1、文海中学喜报2024
2、2023-2024文海高三英语模拟二
3、文海中学2024
4、2024年文海中学中考成绩
5、文海高三语文模拟卷一2024
6、文海实验学校2024年中考
7、2023-2024文海教育集团欢迎您
8、2024年文海学校中学招生简章
9、文海实验 2024中考
10、2023-2024文海中学招生条件是什么

When we have to wrap a gift or mend the ripped(撕破的) page of a book,we probably reach for tape.The sticky stuff is everywhere.But tape has a disadvantage.Its adhesive-the poly- mer(聚合物)that makes it sticky一is made from a fossil fuel. Now scientists at the University of Delaware have come up with a greener solution.They've made a new kind of glue from chemi- cals found in trees. Lignin(木质素)is a natural polymer.It makes woody plants strong and stable.So the scientists wondered whether they could replace oil with plants as a starting ingredient.And their new data confirms that they can. The team started with the poplar tree.They put its wood in