问答题

直放站有哪些优点和缺点

答案：答案：直放站（Repeater）是一种无线通信中继设备，用于扩大无线信号的覆盖范围，提高信号质量。直放站的优点和缺点如下...

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When I took his temperture, I found it ws two degreesbove ．vergeB．ordinryC．common D．normlWhen I took his temperture, I found it ws two degreesbove ．verge B．ordinry C．common D．norml

A.average
B.ordinary
C.common
D.normal

（）是将牵引变电所的直流电送到接触网上

答案：答案：馈线系统馈线系统是将牵引变电所的直流电送到接触网，以供给电力机车或动车组使用。馈线系统通常包括馈线电缆、馈线断路器...