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标题: G友请教一题 [打印本页]

作者: forwardxu 时间: 2006-9-17 11:26 标题: G友请教一题

Which of the following most logically completes the argument?

The irradiation of food kills bacteria and thus retards（减缓） 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. Proponents 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 _______

many of the proponents of irradiation are food distributors who gain from food’s having a longer shelf life
it is clear that killing bacteria that may be present on food is not the only effect that irradiation has
cooking is usually the final step in preparing food for consumption, whereas irradiation serves to ensure a longer shelf life for perishable foods
certain kinds of cooking are, in fact, even more destructive of vitamin B1 than carefully controlled irradiation is
for food that is both irradiated and cooked, the reduction of vitamin B1 associated with either process individually is compounded

请帮我解释一下意思,另外这类题通常怎么做,谢谢

作者: AlphaBeta 时间: 2006-9-17 17:33

我用排除法的

作者: xirui2000 时间: 2006-9-18 20:44

ding !!!!!!!!!!

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