1. [单选题]已知燃气的容积成分为yCH4=98%,yC3H8=0.3%,yC4H10=0.7%,yN2=1%,则标准状态下的平均黏度为( )。[各组分的运动黏度(10-6m2/s)为:CH4=14.50,C3H8=3.81,C4H10=2.53,N2=13.30]
A. 13.91×10-6m2/s
B. 18.31×10-6m2/s
C. 21.15×10-6m2/s
D. 23.47×10-6m2/s
E.
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