题目

（河南省郑州外国语学校2010届高三上学期第三次月考） （C） Schools have been blamed for giving kids access to soda in vending machines (自动售货机).But new data suggest that school soft drink sales may not be an important factor in how much soda kids drink. In the current issue of The Journal of Nutrition Education and Behavior, researchers compared soda consumption among nearly 500 students in Maine who attended seven schools over two school years. Four of the schools cut back on soft drink availability at the schools, while three of the schools made no chang（1）25（x+1）2-36=0（2）（2x-1）3=-8．