A.運(yùn)檢B.營(yíng)銷(xiāo)C.調(diào)控D.安監(jiān)
A.低風(fēng)險(xiǎn)B.中風(fēng)險(xiǎn)C.高風(fēng)險(xiǎn)
A.臨時(shí)性B.計(jì)劃性C.周期性