单项选择题
A.30% B.40% C.50% D.60%
A.蛋白质18%~20%,脂肪30%~35% B.蛋白质15%~18%,脂肪25%~30% C.蛋白质12%~15%,脂肪25%~30% D.蛋白质12%~15%,脂肪30%~35%