A:75次/分
B:88次/分
C:132次/分
D:120次/分
请你用英语描述你同桌的衣着。
This is ……. He/ She……. Her/ His name is……. She/ He is……years old. Look, he's/she's is wearing…….
一个扇形的半径为60cm,圆心角为120°,用它做一个圆锥的侧面,则圆锥的底面半径为( )