A.〈500m(正常氣候條件下)B.〈400m(正常氣候條件下)C.>500m(正常氣候條件下)D.>400m(正常氣候條件下)
A.確認(rèn)B.排風(fēng)C.連接D.斷連
A.1.00~1.60AB.1.00~1.80AC.1.20~1.80AD.1.40~1.80A