按照圖畫出所示圖形,求剖面線區(qū)域的面積。()
A.15672.3682 B.15672.3268 C.15672.3286 D.15672.3826
A.2062.8335 B.2062.8331 C.2062.8353 D.2062.8313
按照圖畫出所示圖形,求視圖上紅色區(qū)域的面積。()
A.434.5036 B.434.5063 C.434.5306 D.434.5360