A.3倍,3倍,3倍 B.1.5倍,2倍,3倍 C.1倍,2倍,3倍 D.2~3倍,2倍,3倍
A.<2倍 B.2-3倍 C.3倍 D.>3倍
A.0~20% B.20~40% C.40~60% D.60~80%