求助：三道陈向东逻辑题

bonniexiong · 发表于 2009-9-7 15:18:00

1.Although compact cars make up only 38percent of the vehicles in traffic ,48 percent of the cars that are followed too closely ("tailgated")are compat .On the other hand ,fewer than 27 percent of the cars tailgated are middle-sized, even though middle-sized cars make up 31percent of the vehicles in traffic.

Which of the following, if true, most contributes to an explanation for the phenomenon described above?

A. The shape of compact cars makes it easy for a tailgater to see far enough ahead around such cars to minimize the chances of a rear-end collision.

B. Middle-sized cars,owned by families with children and pets, are likely to have bumper stickers that are so interesting to have bumper stickers that are so interesting to read that tailgaters stay behind such cars longer.

C. Compact cars on the highway that allow them to pass middle-size cars on the highway easily.

D. The percentage of cars on the highway that are middle-size has been steadily decreasing over the last decade.

E. Compact cars are often driven by fast drivers.

这道题主要的差别就在与追尾。答案选A,但是我感觉不出体现了追尾，反而让我感觉会超车。而选E的话，因为开的快，所以紧跟别的车，这样不久追尾了吗？

2. Despite the fact that the health-inspection procedures for the catering establishments are more stringent than those for ordinary restaurants, more of the cases of food poisoning reported to the city health were brought on by banquets served by catering services than were brought on by restaurant meals.

Which of the following, if true, helps explain the apparent paradox in the statement above?

A. A significantly larger number of people eat in restaurants than attend catered banquets in any given time period.

B. Catering establishments know how many people they expect to serve, and therefore are less likely than restaurants to have, and serve, leftover food, a major source of food poisoning.

C. Many restaurants provide catering services for banquets in addition to serving individual meals.

D. The number of reported food-poisoning cases at catered banquets is unrelated to whether the meal is served on the caterer’s or the client’s premises.

E. People are unlikely to make a connection between a meal they have eaten and a subsequent illness unless the illness strikes a group who are in communication with one another.

答案选E，我明白，但是我不理解选项D.我认为D也对：报道出的可能是假象，与catering establishment无关，因为可能是在之前就已经中毒

3. Studies have shown that people who rarely take antibiotics, which are antibacterial drugs, have stronger immune systems than do people who take antibiotics frequently. Yet there is no evidence that taking antibiotics weakens the immune system.
Which of the following, if true, best reconciles the apparent discrepancy in the information above?
(A) People who have strong immune systems seldom get the kinds of infections for which people normally take antibiotics.
(B) People who have strong immune systems are seldom aware that their immune systems are unusually strong.
(C) People who have weak immune systems have great difficulty recovering from bacterial infections if they do not take antibiotics.
(D) Some people take antibiotics even though the antibiotics cause a variety of side effects.
(E) Some people take antibiotics frequently because their doctors prescribe antibiotics for viral infections as well as for bacterial infections.

答案是A。但是为什么不可能是C.C说明weak immune system needs antibiotics.所以contradicts antibiotics weakens immune system。以逻辑顺序的相反解释了矛盾不行吗