A:C8H18(l)+12.5O2(g)='=' 8CO2(g)+ 9H2O(g) ΔH= ‒ 48.40KJ/mol
B:C8H18(l)+12.5O2(g)='=' 8CO2(g)+ 9H2O(l) ΔH= ‒ 5518KJ/mol
C:C8H18(l)+12.5O2(g)='=' 8CO2(g)+ 9H2O(l) ΔH= +5518KJ/mol
D:C8H18(l)+12.5O2(g)='=' 8CO2(g)+ 9H2O(l) ΔH= ‒ 48.40KJ/mol
梨有36箱,苹果有37箱,小货车一次能运70箱,这些梨和苹果能一次运完吗?
—________ you play the piano for us?—Sorry, I can't play the piano, but I can sing for you.