what is the disadvantage of policing？
客户服务中有哪些提问方式？
人民币的形式，主要包括（） 。 ["银行券","存款通货","纪念币","信用币"]
神经核
What is the effect of turning on all available downstream carrier tones in a DMT DSL transmissionsystems？（） ["Downstream RS error correction effectiveness is reduced","The downstream line rate and throughput remains unchanged， but FEC efficiency is reduced","The upstream DSL bandwidth is reduced， since less carriers become available for upstream traffic","The downstream DSL bandwidth is increased"]
开放课堂
