A.30° B.45° C.60° D.90°
A.丁烷 B.乙炔 C.氢气 D.天然气
A.25kg±0.3kg B.30kg±0.3kg C.35kg±0.3kg D.40kg±0.3kg
A.2min B.5min C.7min D.10min
A.20℃±5℃，60%±10% B.21℃±5℃，65%±10% C.23℃±5℃，60%±10% D.25℃±5℃，65%±10%
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