A.10%~20% B.20%~30% C.30%~40% D.40%~50% E.50%~60%
A.2個(gè)月 B.3個(gè)月 C.4~5個(gè)月 D.6~7個(gè)月 E.1~1歲半
A.1倍B.2倍C.3倍D.4倍E.5倍