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.
看下图填空:
∠AOB=∠AOD-____=____-∠BOC;
∠COD=∠BOD-____=∠AOD-____.
They're pictures of different ____in China.(place/places)
函数y=sinx+cosx的最小值和最小正周期分别是 ( )