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."
这道题有多么的BT。。大家应该都知道了。。主要是这句红句。。。
我个人(仅仅是个人,最好有跟我一致的)的想法是只要有了strong immune system ,旧的病毒--有遗留的撑着呢,新的病毒--有免疫撑着呢,都不怕了--》于是就不得感冒了。。。。