单选题The effective temperature of air is dependent upon（） Ⅰ.relative humidity Ⅱ.air velocityAⅠonlyBⅡonlyCBoth Ⅰand ⅡDNeitherⅠnor Ⅱ
单选题
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
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