A.30%~45% B.40%~55% C.50%~65% D.60%~75%
A.越少 B.越多 C.差不多 D.不變
A.成本風(fēng)險(xiǎn) B.機(jī)會(huì)風(fēng)險(xiǎn) C.成本機(jī)會(huì)風(fēng)險(xiǎn) D.機(jī)會(huì)成本風(fēng)險(xiǎn)