单项选择题

A.高位热值为3723.5kcal/kg,低位热值为3068.7kcal/kg
B.高位热值为2723.5kcal/kg,低位热值为2068.7kcal/kg
C.高位热值为2723.5kcal/kg.低位热值为3068.7kcal/kg
D.高位热值为3723.5kcal/kg,低位热值为2068.7kcal/kg