—_______white and blue.
A:jacket; It's
B:T-shirts; It's
C:T-shirt; They're
D:jackets; They're
(1)△ABC≌△A′B′C′(2)∠BAC=∠B′A′C′(3)直线L垂直平分CC′(4)直线BC和B′C′的交点不一定在直线L上.