1 Y0 }2 n( |' ?; K1 h8 M求:6 \) V* _9 r4 B3 S" R/ B1 F8 Q
1. a 之长度为何? 2 Q% g* i. ^' v' `8 X8 H a. 76.7064 b. 76.7406 c. 76.7604' L4 D9 ~9 G6 o6 q# P9 V3 ?
2. b 弧之长度为何?. z3 J, u. K! C. |$ ^. D. l% z. n
a. 68.5273 b. 68.5372 c. 68.57234 o8 [. _9 f- y1 Z2 U
3. 剖面线区域之面积为何?2 p* k M" D! H; S: W& M1 ?: k5 U" S
a. 443.5255 b. 443.5525 c. 443.5552
1. a 之长度为何? c. 76.7604: `0 y j( x- E" N8 h
2. b 弧之长度为何? c. 68.5723 # b; Q+ V( f% d9 p7 K4 x3. 剖面线区域之面积为何? a. 443.5255( a6 |2 g4 H8 I5 v
9 Z' {% u) i6 b