A.(193.74,73.74) B.(193.74,75.74) C.(75.74,193.74) D.(222.05,135.46)
如圖所示,粗線區(qū)域周長為?()
A.299.0001 B.298.9949 C.298.9948 D.298.9947
A.20,30 B.20<30 C.@20<30 D.@20,30