在五类双绞电缆中传输的信号频率越高,( )。A.衰减越小,近端串音衰减越小B.衰减越大,近端串音衰减越大C.衰减越小,近端串音衰减越大D.衰减...

作者: rantiku 人气: - 评论: 0
问题 在五类双绞电缆中传输的信号频率越高,( )。
选项 A.衰减越小,近端串音衰减越小 B.衰减越大,近端串音衰减越大 C.衰减越小,近端串音衰减越大 D.衰减越大,近端串音衰减越小
答案 D
解析 由几个电气特性表可以看出。

猜你喜欢

发表评论
更多 网友评论0 条评论)
暂无评论
错误啦!

错误信息

  • 消息: [程序异常] : MISCONF Redis is configured to save RDB snapshots, but it's currently unable to persist to disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
  • 文件: /twcms/kongphp/cache/cache_redis.class.php
  • 位置: 第 85 行
    <?php echo 'KongPHP, Road to Jane.'; ?>