| GWD 5-Q30: Which of the following most logically completes the argument? The irradiation of food kills bacteria and thus retards spoilage.  However, it also lowers the nutritional value of many foods.  For example, irradiation destroys a significant percentage of whatever vitamin B1 a food may contain.  roponents of irradiation point out that irradiation is no worse in this respect than cooking.  However, this fact is either beside the point, since much irradiated food is eaten raw, or else misleading, since _______. A.      many of the proponents of irradiation are food distributors who gain from food’s having a longer shelf life B.       it is clear that killing bacteria that may be present on food is not the only effect that irradiation has C.      cooking is usually the final step in preparing food for consumption, whereas irradiation serves to ensure a longer shelf life for perishable foods D.      certain kinds of cooking are, in fact, even more destructive of vitamin B1 than carefully controlled irradiation is  E.       for food that is both irradiated and cooked, the reduction of vitamin B1 associated with either process individually is compounded 答案是E 
 
 
 
 这题应该是E 注意,food irradiation 表示:食品照射 (利用伽马射线照射蔬菜或水果, 以取代传统的利用冷冻或化学防腐剂等保存食品的方法) 不是微波。 所以,对既irradiation又cooking的food来说,V B的损失就要compound了。 |