A:乙烷、丙烯、丙炔
B:乙烯、乙炔、苯
C:1,3﹣丁二烯、甲苯、环乙烷
D:丙烯、乙炔、乙烷
The room is full of people and they are discussing an important thing.
如图,直线AB∥CD,BC平分∠ABD,∠1=65°,求∠2的度数.