A. temperature of the air equals the temperature of the seawater B. atmospheric pressure is 14.7 lbs. per square inch C. relative humidity reaches 50% D. air becomes saturated with water vapor
A. 正确 B. 错误
A. 建筑钢材 B. 锅炉暖通 C. 建筑石材 D. 供气管材 E. 防火消防设备