A.7 B.14 C.21 D.28
A.5%,10% B.10%,20% C.10%,25% D.10%,30%
A.社會(huì)先進(jìn)水平 B.社會(huì)平均先進(jìn)水平 C.社會(huì)平均水平 D.個(gè)別企業(yè)水平