A.風(fēng)險(xiǎn)分擔(dān)和互濟(jì) B.參與主體普遍 C.風(fēng)險(xiǎn)轉(zhuǎn)移 D.權(quán)利與義務(wù)對(duì)等
A.30% B.40% C.50% D.70%