A.12H B.24H C.36H D.48H
A.風(fēng)險(xiǎn)分析B.風(fēng)險(xiǎn)識(shí)別C.風(fēng)險(xiǎn)應(yīng)對(duì)D.風(fēng)險(xiǎn)控制
A.5mm B.9mm C.12mm D.15mm