A.8db B.0.08db C.16db D.32db
A.極高風(fēng)險(xiǎn)工點(diǎn) B.高度風(fēng)險(xiǎn)工點(diǎn) C.關(guān)鍵風(fēng)險(xiǎn)工點(diǎn) D.中度風(fēng)險(xiǎn)工點(diǎn)
A.1 B.2 C.3 D.5