①AC⊥BD;②CB=CD;③△ABC≌△ADC;④DA=DC.
其中所有正确结论的序号是____.
I'm Tom. I have a friend. Her name is Lucy. She is ____.Her favourite food is ____. She is thirsty. She would like some ____ .Her water bottle is ____the table. Look! There is her photo ____the table.