A.90% B.45% C.15% D.33%
A.不容許風(fēng)險(xiǎn) B.重大風(fēng)險(xiǎn) C.中度風(fēng)險(xiǎn) D.可容許風(fēng)險(xiǎn)
A.洪澇災(zāi)害 B.百年不遇的暴風(fēng)雪 C.暴動(dòng) D.海嘯