按照圖畫出所示圖形,求剖面線區(qū)域的面積。()
A.2277.7857 B.2277.8757 C.2277.8775 D.2277.8577
A.1912.6755 B.1912.6575 C.1912.6557 D.1912.7655
A.609.2406 B.609.2064 C.609.2046 D.609.2604