题目

People who smoke could lose around one third of their everyday memory, researchers say. A study by a team at the University of Northumbria has shown that smokers lose more of their memory when compared to non-smokers. And the research also found that those who kicked the habit saw their ability to recollect information restored to almost the same level as non-smokers. The study involved more than seventy 18-to 25-year-old volunteers and included a tour of the university’s campus. Those who took part were asked to recall(回忆；回想)small details, such as music acts listed to play用滴管从瓶中吸取酒精，滴在手上，感觉凉凉的，小明就这一现象产生的原因，提出了两种猜想，猜想1：酒精的温度低于手的温度；猜想2：酒精蒸发时吸热，有致冷作用。随后，他在烧杯中倒入适量酒精，用相同的温度计分别测量手的温度t1和烧杯中酒精的温度t2，并重复多次，均发现t1＞t2，由此，他（ ）A. 只能验证猜想1B. 只能验证猜想2C. 既能验证猜想1，也能验证猜想2D. 既不能验证猜想1，也不能验证猜想2