按照圖畫出所示圖形,求剖面線區(qū)域的面積。()
A.275.4914 B.275.4194 C.275.4491 D.275.4419
A.1067.3530 B.1067.3435 C.1067.3345 D.1067.3350
按照圖畫出所示圖形,求角度A的數(shù)值。()
A.55.9180 B.55.9801 C.55.9108 D.55.9081