简述粘合纺纱的成纱原理。
参考答案:
将短纤维条子用水溶性粘合剂粘合,烘干成纱,织成布后将水溶性粘合剂洗去。
You should________your spare time better if you want to be promoted. [ ]
A. take
B. employ
C. cost
D. improve
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