半成改写成百分数是请选择CBA(p7L6s/v4y4O.h+?0V+},q7`1G6G-~7n
A.50%+?0V+},q7`1G6G-~7n
B.0.5%+?0V+},q7`1G6G-~7n
C.5%+?0V+},q7`1G6G-~7n