一 What happened to you? You look scared.
— Someone followed me all the way.
A：went after
B：walked on
C：talked with
扇形的周长为6cm，面积是2cm2，则扇形的圆心角的弧度数是（ ）
下列灾害中属于地质灾害的是（ ）
①干旱 ②滑坡 ③台风 ④泥石流 ⑤寒潮．
刻在____或____上的文字叫做甲骨文。
