求助，帮我看看这两题

happy_oh

Q29:

Over the past five years, the price gap between name-brand cereals and less expensive store-brand cereals has become so wide that consumers have been switching increasingly to store brands despite the name brands’ reputation for better quality.  To attract these consumers back, several manufacturers of name-brand cereals plan to narrow the price gap between their cereals and store brands to less than what it was five years ago.

 

Which of the following, if true, most seriously calls into question the likelihood that the manufacturers’ plan will succeed in attracting back a large percentage of consumers who have switched to store brands?

 

1. There is no significant difference among manufacturers of name-brand cereals in the prices they charge for their products.
2. Consumers who have switched to store-brand cereals have generally been satisfied with the quality of those cereals.
3. Many consumers would never think of switching to store-brand cereals because they believe the name brand cereals to be of better quality.
4. Because of lower advertising costs, stores are able to offer their own brands of cereals at significantly lower prices than those charged for name-brand cereals.
5. Total annual sales of cereals—including both name-brand and store-brand cereals—have not increased significantly over the past five years.
                       

答案是B，但我觉得B选项诉诸主观了，求教各位大虾的看法！

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.  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 _______.

 

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

答案是E，我觉得不通，求解释！

happy_oh

自顶一下

victorhang

我觉得第一道题option B没有疑问啊,本来问题的假设就是if following is true...,正好B weaken了name brand厂商的 如意算盘

[此贴子已经被作者于2007-12-28 11:44:31编辑过]

happy_oh

thx

who can help me with the second?please

SOS

atc

选E。C肯定是不对的，压根说的不是一件事情。谈论的主题是两种方法对营养流失的比较！