21. 下列何種情緒理論，適合解釋有人喜好玩驚險刺激的高空彈跳活動?
(A)詹郎二氏情緒論(James-Lange theory)
(B)坎巴二氏情緒論(Cannon-Bard theory)
(C)斯辛二氏情緒論(Schachter-Singer theory)
(D)情緒相對歷程論(opponent-process theory)

答案是（D）情緒相對歷程論（oppon...