A.6% B.20% C.4% D.10‰ E.上述資料不能計(jì)算
A.2‰ B.60‰ C.10‰ D.50‰ E.20%
A.2‰ B.60‰ C.10‰ D.20% E.上述資料不能計(jì)算出粗死亡率