点A1A2A3A4在射线OA上,点B1B2B3在射线OB上,且A1B1∥A2B2∥A3B3,A2B1∥A3B2∥A4

点A1A2A3A4在射线OA上,点B1B2B3在射线OB上,且A1B1∥A2B2∥A3B3,A2B1∥A3B2∥A4 如图,A1A2A3A4在射线OA上,点B1B2B3在射线OB上,且A1B1‖A2B2‖A3B3,A2B1‖A3B2‖A4 如图，点A1，A2，A3，A4在射线OA上，点B1，B2，B3在射线OB上，且A1B1∥A2B2∥A3B3，A2B1∥A 如图点A1,A2,A3,A4在射线OA上,点B1,B2,B3在射线OB上,且A1B1∥A2B2∥A3B3,A2B1∥A3 如图,点A1,A2,A3,A4在射线OA上,点B1,B2,B3在射线OB上,且A1B1‖A2B2‖A3B3,A2B1‖A 点A1,A2,A3,A4在射线OA上,点B1,B2,B3,B4在射线OB上,且A1B1‖A2B2‖A3B3,A2B1‖A 如图,A1,A2,A3,A4在射线OA上,点B1,B2,B3在射线OB上,且A1B1‖A2B2‖A3B3,A2B1‖A3 如图,点A1,A2,A3,A4,…,An在射线OA上,点B1,B2,B3,…,Bn―1在射线OB上,且A1B1∥A2B2 （2008•温州）如图,点A1,A2,A3,A4在射线OA上,点B1,B2,B3在射线OB上,且A1B1∥A 点A1 A2 A3 A4在射线OA上,点B1 B2 B3在射线OB上,且A1 B1 ‖A2 B2‖A3 B3,A2 B1 已知射线AB∥射线CD，点E、F分别在射线AB、CD上． 如图,​已知∠AOB=α,在射线OA、OB上分别取点A1、B1,使OA1=OB1,连接A1B1,在B1A1、