單項(xiàng)選擇題已知LPG中C3H8質(zhì)量分?jǐn)?shù)是0、5,C4H10質(zhì)量分?jǐn)?shù)是0.5。ρC3H8=0、51kg/L,ρC4H10 =0.5kg/L,則ρLPG為()kg/L

A.0.823
B.0.672
C.0.543
D.0.325


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