常规单模光纤的零色散波长窗口在()
A. 0.85µm
B. 1.31µm
C. 1.55µm
自由锻拔长圆形截面坯料时的变形特点是什么?易出现的质量问题、产生原因、常采取的预防措施是什么?
The theory of learning underlying the Grammar-Translation Method was Faculty Psychology. The Faculty Psychologists believed that the mind of human beings had various faculties which could be trained separately.()
A. 正确
B. 错误
手工确认的分类结果比本次机评结果或上期分类结果发生形态向上调整的,需要在()天内完成流程审批,审批结束后,系统自动更新台帐结果;向下调整的,不走流程审批,系统自动更新台帐结果。
A. 4.0
B. 2
C. 3.0
D. 5