A.50% B.60% C.75% D.80%
A.管理機(jī)制 B.經(jīng)營(yíng)機(jī)制 C.價(jià)格機(jī)制 D.競(jìng)爭(zhēng)機(jī)制
A.12% B.13% C.10% D.11%