题目

We redheads are well known for our bad tempers. Now it seems there is scientific backing for our particular complaining as well. Scientists in the United States studied a group of 144 dental patients almost half of whom had red hair. They found that the red-haired group were more sensitive to pain and as a result were twice as likely to avoid visiting the dentist. Previous research had shown that redheads were more resistant to the effects of local anaesthesia(局部麻醉) than people with other hair colours. The scientists say that this red-haired sensitivity to pain stems from the action海洋对大气的作用主要是输送能量来改变大气运动，这种能量主要是（　　）? A.动能　　　　　 B.势能　　　　　 C.热能　　　　　 D.化学能?