A.-0.3≤P≤1.8 B.-0.295≤P≤1.7 C.-0.2≤P≤1.8 D.-0.295≤P≤1.75
A.下雪天 B.雷雨天 C.大風(fēng)天
A.先開(kāi)水泵后開(kāi)風(fēng)機(jī) B.先開(kāi)風(fēng)機(jī)后開(kāi)水泵 C.沒(méi)有具體要求,可以隨便開(kāi)啟