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"]
左翼文学的目的是：（） ["自我完善","把现存社会改造推翻，夺取政权","维护专制","以上说法都正确"]
层系组
阐发研究的注意事项
什么是信息经济？
