问题
多项选择题
纸胎基油毡防水层的缺点有（）。
A.抗拉强度及塑性较低
B.吸水率较小
C.透水性较差
D.原纸的原料来源困难
E.易腐烂、耐久性较差
答案
参考答案：A, D, E
解析：纸胎基油毡防水层的缺点有：抗拉强度及塑性较低，吸水率较大，不透水性较差，并且原纸由植物纤维制成，易腐烂、耐久性较差。此外，原纸的原料来源也较困难。
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纸胎基油毡防水层的缺点有（）。
A.抗拉强度及塑性较低
B.吸水率较小
C.透水性较差
D.原纸的原料来源困难
E.易腐烂、耐久性较差
参考答案：A, D, E
解析：纸胎基油毡防水层的缺点有：抗拉强度及塑性较低，吸水率较大，不透水性较差，并且原纸由植物纤维制成，易腐烂、耐久性较差。此外，原纸的原料来源也较困难。
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| Brandon Keefe was in the third grade when he decided to make a difference. One afternoon at a parent-teacher meeting to 1 building a library for a children's home, Brandon heard 2 difficult it was to get books. And he thought he might have a good 3 . Many people have books that they don't like to read any more, so 4 give those books to kids who need them? To help those kids who 5 . books to read, Brandon Keefe started an organization (组织)-Book Ends. The organization has 6 76 000 books to children in need, and built 23 7 . 19 more libraries are being built. 8 will help more than 33 000 poor kids. "So many people helped me do the work 9 the organization. And the reaction (反映) of the people we helped makes me work 10 to help more people," Brandon Keefe said. | ||||
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