10. Concentrated sulfuric acid and 2 M of dilute sulfuric acid are placed open in the experiment. The relationship between their masses and the number of days in which they are placed is shown in the figure on the right. Which of the following process pairs is responsible for the change in the curves of a and b?


答案:B
統計:A:0,B:1,C:0,D:0,E:0
難度:計算中