105.The following appeared in a health newsletter. "According to a recent study, people with many social ties report catching colds less often than do people with few social ties. Consequently, researchers conclude that having an active social life probably helps strengthen the immune system. The researchers note that catching a cold-one of a family of highly contagious viruses-gives the cold-sufferer temporary immunity to that virus in the future, but not to the many other related viruses. Merely being exposed to a new cold virus, however, is not enough for a person to catch a cold, since a strong immune system can successfully fight off some new viruses. Thus, in order to prevent catching a cold, people should strengthen their immune systems by becoming more active socially." 我想请问 大家对这题要怎麽反驳?? 我想了两三天...它是有点怪啦~但就是不知道 把那个"怪"找出来~ --

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