单选题 Food is to the blood ______ reading is to the mind.
【正确答案】 C
【答案解析】[解析] 这是一个文气的句型,把它简化起来就是:A is to B what X is to Y=A is to B just as X is to Y.“A对于B正如X对于Y一样。”又如:People is to the army what water is to fish.