【进阶级练习题97】) `; M$ ^7 F1 }# O; g5 B
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求: 2 w0 r7 ?$ w/ G9 n5 u H8 C7 J1. Ra 之半径值为何? * {6 C- c- V K5 k2 ~ a. 18.1006 b. 18.1060 c. 18.1600' W3 k7 ]' i u, D
2. Rc 之半径值为何? ' {/ `* }% a0 r3 \- A) m1 B a. 68.1006 b. 68.1060 c. 68.1600! `+ P. W; h _
3. ∠ABC 之角度值为何?8 X& g/ c/ V) a1 L
a. 14.5971° b. 14.7195° c. 14.9571° : t, r9 |' O/ x( r4. 剖面线区域之面积为何? * ~+ f. K- [3 \3 z0 c) J4 r a. 3019.5479 b. 3019.5794 c. 3019.5947 . G m1 G+ q7 k% u" M# X9 n! N& {# }# S5 z$ C' s! x
[ 本帖最后由 shaonx 于 2009-6-1 20:57 编辑 ]