A:Fe
B:C
C:Si
D:Al
(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.
— I hear you have to get up early in the morning.
— Yes, it is one of the ________ in my family.