+ H; b* {# F* ^" ]' ]- f1 i求:7 K! x! j( }+ @2 q* ]9 B/ `
1. a之半径为何?& E' f8 s5 w" y+ c |% }
a. 8.4699 b. 8.4969 c. 8.4996- S( Z8 n' @, ^/ v" U0 O( \
2. AB两点之Y轴距离为何?( k [1 W8 R* V; n' E
a.65.5678 b. 65.7568 c. 65.78652 I. T! s# z" v' F0 v' [
3. ∠ABC之角度为何?! a7 Z7 v- F; U V
a. 50.182° b. 50.218° c. 50.381° * v3 M# S4 A$ a9 `1 k4. 蓝色剖面线区之面积为何? 5 }9 v% z, I* @; z a. 730.1281 b. 731.2018 c. 732.1081# {" Q, U( i1 X$ @/ J. r# O