第一章测试1.Which of the following fibers are regenerated fibers? （ ）
A:cotton B:Tencel C:milk fiber D:acetate
答案:BCD
2.Which of the following descriptions are the main reasons why one synthetic fiber has better hydrophilicity than another synthetic fiber? （ ）
A:It has more amorphous regions. B:It has a higher molecular weight. C:It has more H-bonds or polar groups. D:It has a smoother surface.
答案:AC
3.Which of following properties are the properties that synthetic fibers usually have? （ ）
A:lower moisture regain B:good resistance to moths mildew and fungi C:lower resilience D:oleophilic but hydrophobic
答案:ABD
4.Which of the following fiber is considered to be one of the strongest and lightest fiber in the world? （ ）
A:Spectra B:Nomex C:Kevlar D:nylon
答案:A
5.Which of the following are the routine quality tests for natural fibers? （ ）
A:boiling shrinkage test B:impurity test C:tensile test D:fineness test
答案:BCD
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