A.1:1.00 B.1:0.75 C.1:0.67 D.1:0.10
A.1:1.00 B.1:0.75 C.1:0.50 D.1:0.10
A.不超過(guò)1m B.不超過(guò)2m C.不超過(guò)2.5m D.不超過(guò)3m