A.10sB.30sC.40sD.50sE.60s
A.2個(gè)月以后 B.4個(gè)月以后 C.6個(gè)月以后 D.8個(gè)月以后 E.10個(gè)月以后
A.80 B.90 C.100 D.110 E.120