单项选择题
The effective temperature of air is dependent upon（） Ⅰ.relative humidity Ⅱ.air velocity
A.Ⅰonly B.Ⅱonly C.Both Ⅰand Ⅱ D.NeitherⅠnor Ⅱ
单项选择题 When air is at its dew point it is at its（）
单项选择题 The latent heat of water vapor in air is dependent upon the （）
单项选择题 If you find an extremely large refrigerant leak while using a halide torch, your flame will（）
