(Unit3TextB课文段落) 2.Most researches agree that there are two kinds of stress: good stress — eustress — and bad stress — distress — commonly known as stress. Pleasing activities that overload our nervous systems are a type of eustress, such as having a baby or riding a roller coaster ( if you enjoy the thrill ) . Another type of eustress leads to better performance, but only up to a point, as the illustration displays. 题目: According to most researchers, how many kinds of stress are there?