Ⅰ.阅读理解(共15小题；每小题2分，满分30分)
A
(2016·太原市模拟)Happiness increases when we experience more positive emotions throughout the day. Fredrickson, a leader in the field of psychology, identifies 10 positive emotions, including joy, interest, hope, pride, amusement, inspiration, love and so on. How often we experience these positive emotions compared to negative emotions in a day affects not only our mood, but also our physical health. She has discovered that those who have a 3∶1 ratio of positive to negative emotions on a daily basis are happier and healthier.
