按照圖畫出所示圖形,求剖面線區(qū)域的周長。()
A.188.4956 B.188.4659 C.188.4965 D.188.4569
按照圖畫出所示圖形,求圓弧的長度F的數(shù)值。()
A.296.0127 B.296.0172 C.296.0712 D.296.0721
按照圖畫出所示圖形,求小圓半徑B的數(shù)值。()
A.13.1699 B.13.1966 C.13.1969 D.13.1996