注入激光新技术,用光纤通信代替电缆通信,体现的价值的提高途径为( )
A.以成本适当上升换取功能大幅提高
B.在成本不变的前提下提高功能
C.提高功能并降低成本
D.在保持功能的前提下降低成本
正确答案是C
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