A.2.00hB.3.00hC.4.00hD.5.00h
A.18m×18m B.15m×15m C.13m×13m D.12m×12m
A.1.1m B.1.2m C.1.3m D.1.4m
A.下風(fēng) B.上風(fēng) C.側(cè)風(fēng) D.正風(fēng)
A.10s B.30s C.50s D.100s