A.50/10萬 B.100/600 C.100/120 D.25% E.所給資料不能計(jì)算
A.6% B.2% C.20% D.17%
A.300/10萬 B.60/10萬 C.10/1000 D.100/1000 E.所給資料不能計(jì)算