问题 单项选择题

经济学家区别正常品和低档品的唯一方法,就是看消费者对收入变化的反应如何。如果人们的收入增加了,对某种东西的需求反而变小,这样的东西就是低档品。类似地,如果人们的收入减少了,他们对低档品的需求就会变大。 以下哪项陈述与经济学家区别正常品与低档品的描述最相符

A.学校里的穷学生经常吃方便面,他们毕业找到工作后就经常下饭馆了。对这些学生来说,方便面就是低档品。

B.在家庭生活中,随着人们收入的减少,对食盐的需求并没有变大。毫无疑问,食盐是一种低档品。

C.在一个日趋老龄化的社区,对汽油的需求越来越小,对家庭护理服务的需求越来越大。与汽油相比,家庭护理服务属于低档品。

D.当人们的收入增加时,家长会给孩子多买几件名牌服装,收入减少时就少买点。名牌服装不是低档品,也不是正常品,而是高档品。

答案

参考答案:A

解析: 此题属于语义分析型。 经济学家对“低档品”的关键描述是:收入增加对其的需求反而变小;收入减少对其的需求反而变大。A项把方便面列为低档品的理由与这些描述很相符。B项把食盐列入低档品,与对“低档品”的上述说明不一致。C项对“低档品”的用法也与题干中的说明不一致。题干没有谈到如何识别“高档品”,故D项是无关选项。所以,正确选项是A。

判断题
单项选择题

Trying to get Americans to eat a healthy diet is a frustrating business. Even the best-designed public-health campaigns cannot seem to compete with the tempting flavors of the snack-food and fast-food industries and their fat-and sugar-laden products. The results are apparent on a walk down any American street—more than 60% of Americans are overweight, and a full quarter of them are overweight to the point of obesity.

Now, health advocates say, an ill-conceived redesign has taken one of the more successful public-health campaigns—the Food Guide Pyramid—and rendered it confusing to the point of uselessness. Some of these critics worry that America’s Department of Agriculture caved in to pressure from parts of the food industry anxious to protect their products.

The Food Guide Pyramid was a graphic which emphasizes that a healthy diet is built on a base of grains, vegetables and fruits, followed by ever-decreasing amounts of dairy products. meat, sweets and oils. The agriculture department launched the pyramid in 1992 to replace its previous program, which was centered on the idea of four basic food groups. The "Basic Four" campaign showed a plate divided into quarters, and seemed to imply that meat and dairy products should make up half of a healthy diet, with grains, fruits and vegetables making up the other half. It was replaced only over the strenuous objections of the meat and dairy industries.

The old pyramid was undoubtedly imperfect. It failed to distinguish between a doughnut and a whole-grain roll, or a hamburger and a skinless chicken breast, and it did not make clear exactly how much of each foodstuff to eat. It did, however, manage to convey the basic idea of proper proportions in an easily understanable way. The new pyramid, called" My Pyramid", abandons the effort to provide this information. Instead, it has been simplified to a mere logo. The food groups are replaced with unlabelled, multi-colored vertical stripes which, in some versions, rise out of a cartoon jumble of foods that look like the aftermath of a riot at a grocery store. Anyone who wants to see how this translates into a healthy diet is invited to go to a website, put in their age, Sex and activity level, and get a Custom. designed pyramid, complete with healthy food choices and suggested portion sizes. This is fine for those who are motivated, but might prove too much effort for those who most need such information.

Admittedly, the designers of the new pyramid had a tough job to do. They were supposed to condense the advice in the 84-page United States’ Dietary Guidelines into a simple, meaningful graphic suitable for printing on the back of a cereal box. And they had to do this in the face of pressure from dozens of special interest groups—from the country’s Potato, Board, which thought potatoes would look nice in the picture, to the Almond Board of California, which felt the same way about almonds. Even the National Watermelon Promotion Board and the California Avocado Commission were eager to sect heir products recognized.

Nevertheless, many health advocates believe the new graphic is a missed opportunity. Although officials insist industry pressure had nothing to do with: the eventual design, some critics suspect that political influence was at work: On the other hand, it is not clear how much good even the best graphic could do. Surveys found that 80% of Americans recognized the old Food Guide Pyramid—a big success in the world of public, health campaigns. Yet only 16% followed its advice.

"Trying to get Americans to eat a healthy diet is a frustrating business" can be easily proved by the fact that()

A. public-health campaigns cannot compete with tempting flavors

B. snack-food and fast-food industries are flourishing in the US

C. most food in America are profoundly rich in fat and sugar

D. fat people account for a large proportion of American population