During the manufacture of line,yarns are twisted together in the().
A. opposite direction from which the fibers are twisted together to form strands
B. same direction the fibers are twisted to form strands
C. opposite direction from which the fibers are twisted together to form the line
D. opposite direction from which the fibers are twisted together forming cable
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国际企业文化的层次结构包括心理层次、制度层次、()。
钢丝绳润滑剂()用润滑脂,最好用钢丝绳油,亦可用中性机油;
A. 不宜
B. 可以
C. 适当
D. 起重机械检验技术
鸟类的尿主要由尿素构成。()
A. 正确
B. 错误