按照?qǐng)D畫出所示圖形,求剖面線區(qū)域的面積。()
A.2494.5075 B.2494.0557 C.2494.0575 D.2494.0755
A.1743.9013 B.1743.9010 C.1743.9031 D.1743.9103
按照?qǐng)D畫出所示圖形,求尺寸A的數(shù)值。()
A.76.6994 B.76.6949 C.76.6499 D.76.4996