摘要： Litmus TestTime Limit: 1000MSMemory Limit: 30000KTotal Submissions: 950Accepted: 479DescriptionThe pH scale measures the concentration of protons (H+) in a solution and, therefore, its acidity or alkalinity. The pH value of a solution is a number between 0 and 14; it is less than 7 if the solution i 阅读全文