A.一個(gè)連接管三個(gè)補(bǔ)修管 B.兩個(gè)連接管四個(gè)補(bǔ)修管 C.一個(gè)連接管兩個(gè)補(bǔ)修管 D.兩個(gè)連接管三個(gè)補(bǔ)修管
A.0.5m B.0.8m C.1.0m D.1.5m
A.8 B.10 C.12 D.14