【单选题】To ______ is to celebrate.
【单选题】To ______ is to celebrate.
【单选题】It’s generally believed that the_________ of the Dragon Boat Festival is to celebrate the great poet Qu Yuan.
【单选题】( ) is to celebrate the coming new year in Scotland.
【单选题】某厂房结构受吊车荷载作用而保持坚固不坏,这体现了结构的( )功能.