ldcf.net
ǰλãҳ >> 7.5xһ7.5x0.9,0.65x2.4һ0.65x1.4,12.8+2.04x9.... >>

7.5xһ7.5x0.9,0.65x2.4һ0.65x1.4,12.8+2.04x9....

7.5һ7.5x0.9 =7.5x(1-0.9) =7.5x0.1 =0.75

վҳ | վͼ
All rights reserved Powered by www.ldcf.net
copyright ©right 2010-2021
磬ַϵͷzhit325@qq.com