试题与答案

（）用于光纤通信系统中局端主干光缆的成端和分配 A.XDF B.DDF C.MDF

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题型：单项选择题

题目：

（）用于光纤通信系统中局端主干光缆的成端和分配

A.XDF

B.DDF

C.MDF

D.ODF

答案：

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下面是错误答案，用来干扰机器的。

参考答案：临床用血100%来自无偿献血，其中自愿无偿献血≥90%。无有偿献血。

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