【进阶级练习题60】' |0 d% c2 c) O
7 S# j5 ~$ W9 f! j. t9 _
求: F6 | X# z/ i! [! T. \4 d
1. a 之长度为何?8 z0 c0 P- F* d A, o: ^9 M# @
a. 13.0115 b. 13.0151 c. 13.0511 . B5 o- z- @2 l, J- A/ o2. 剖面线区域之面积为何?9 K/ F: [3 V* h3 D- z& a2 [# i
a. 194.2153 b. 194.2351 c. 194.2513