A.RLC UM B.RLC AM C.RLC TM
A.≤30° B.≤35° C.≤40° D.≤45°
A.商務(wù)經(jīng)理、 B.項(xiàng)目經(jīng)理、 C.設(shè)計(jì)工程師、 D.工程督導(dǎo)