“行人第一，脚踏车第二，汽车最后”这一发达国家普遍遵循的道路交通原则，值得我们借鉴。汽车社会需要健康的汽车文化，这是因为

①文化影响人们的实践活动和思维方式 ②文化决定人们的交往行为和交往方式

③健康的文化能提高人的思想道德修养 ④健康的文化是个人素养的核心和标志

A．①③

B．①④

C．②③

D．②④

People often recall having felt chilled before the onset of a cold. This supports the hypothesis that colds are, at least sometimes, caused by becoming chilled; it is the chill that allows a rhino virus, if present, to infect a person. Which of the following, if true, most seriously weakens the force of the evidence cited above

A．Being chilled is a form of stress, and stress lowers the defenses of a person’s immune system, which guards against infection.

B．After a rhino virus has incubated in a person for several days, the first symptom it causes is a feeling of chilliness.

C．People who are tired and then become chilled are more likely to catch severe colds than are people who are chilled without being tired.

D．Some people who catch colds are not sure what it was that allowed them to catch cold.

E．(E) Rhino viruses are not always present in the environment, and so a person could become chilled without catching a cold.