A.基礎網(wǎng)B.業(yè)務網(wǎng)C.支撐網(wǎng)D.同步網(wǎng)
A.正比例關系B.反比例關系C.正對數(shù)曲線關系D.反對數(shù)曲線關系
A.4B.2C.1D.8