题目

From hisface, we could tell how the movie was. A . terrifying, thrilling B . terrifying, thrilled C . terrified, thrilling D . terrified, thrilled 答案:C笑笑和淘气从圆形场地边缘的同一地点同时出发,沿着场地的边缘相背而行,20分钟后两人相遇,笑笑每分走70米,淘气每分走87米.这个圆形场地的半径是多少米?占地面积是多少平方米?
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