A.0 B.1 C.2 D.3 E.4
A.捷徑抽樣 B.隨機(jī)抽樣 C.整群抽樣 D.系統(tǒng)抽樣 E.分層抽樣
A.20%~30% B.30%~40% C.40%~50% D.50%~60% E.60%~70%