单项选择题
A.节约42% B.节约15% C.节约34% D.节约26%
A.2.79%;2.36% B.2.36%;2.79% C.2.21%;2.01% D.3.31%;3.01%
A.早餐前剂量占20%,晚餐前剂量占80% B.早餐前剂量占30%,晚餐前剂量占70% C.早餐前和晚餐前剂量各占50% D.早餐前剂量占70%,晚餐前剂量占30%