Which of the following techniques can be applied to dealing with the potential negatives that change

A.下行传输数据的带宽需求远大于上行带宽,也就是说下行链路会占据最主要通信带宽。()


B.在周朝时期,在治理天下时采用的是通过王室来分封到各地,建诸侯。()


C.俗语有“千年铁树开花”,铁树指的是 ?


D.闭区间上的连续函数一定有()