光电缆故障时，通信站、工区向段调度汇报时应做到四清（）
A. 光电缆种类清
B. 故障距离清
C. 故障时间清
D. 故障现象清
查看答案
f a Cisco switch is configured with VTPv1 in transparent mode， what is done with received VTP advertisements？（）
A. They are discarded
B. The contents are altered to reflect the switch’s own VTP database and then they are forward out all trunking ports
C. The changes within the advertisements are made to the switch’s VTP database.
D. The contents are ignored and they are forwarded out all trunking ports.
西贝柳斯创作了（）部交响曲，都是无标题的“（）”形式。
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