A:1红3白
B:2红2白
C:1红1白2黄
D:3红1白
I like English very much. ____ ____ ____
已知△ABC与△A1B1C1的相似比为2:3,△A1B1C1与△A2B2C2的相似比为3:5,那么△ABC与△A2B2C2的相似比为____