A:半坡遗址
B:北京人遗址
C:河姆渡遗址
D:元谋人遗址
Broadway has been well-known for its theatres since the early ____ century. (twenty)
孙中山领导的辛亥革命的最主要历史功绩在于( )
弯曲形变的特点是____.