原帖由 jicheng 于 2007-1-4 21:43 发表 
, u2 O7 R3 A- E- b, x2 x$ ]% T求:' m4 M n7 e- ~; H
1. a 之长度为何?; j X- N: D# `2 P, J- S7 P
a. 9.6477 b. 9.6747 c. 9.6774
6 W. e" i* J/ l7 J: k9 h2. b 之长度为何?# _. S+ C" M. m" g
a. 14.5116 b, 14.5161 c. 14.5611
, K7 ]7 H/ B x- j3. A弧之弧长为何?
2 w% I l( r {, W0 S* b$ e" X. q- g$ H a. 27.0034 b. 27.0304 c. 27.0403 ...
7 h! u v! Y/ x: w+ J0 U. Tjicheng 大哥救命啊,我怎么做这题别的都对,那两个弧长就是不对啊,我把我做的图传上来,你帮我看哈! |