在2A + B 3C + 4D反应中,表示该反应速率最快的是 A.v(A)=0.3mol/L· s B.v(B)=0.3mol/L· s C.v(C)=0.3mol/L· s D.v(D)=1mol/L· s 答案: B32、----- Would you like to buy a new MP4?
----- Sure, but I _____ . I don’t have enough money at the moment.
A. don’t afford B. can’t afford to C. afford
to D. will afford