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1. a 弧之长度为: 0 W3 n7 T- B, f* T3 W1 }* S+ K b. 83.7758 + t4 h0 j/ j. ?( C! ?+ S2. b 弧之长度为:" q: d/ h6 V8 r6 p" C
c. 60.4600. h7 I0 w$ J8 w, @( A
3. c 弧之长度为:' }5 w. B- L n/ p# U! ^" ~
b. 65.5325; O# l6 u+ S5 u5 X
4. d 弧之长度为: e8 ]; ^2 f$ N2 r/ n( z
c. 108.6100 : D0 ?2 M3 I5 n0 A3 j* [5. e 弧之长度为:" v7 U& B" W5 R' ?
a. 76.8018 4 o3 w0 z. u" i% s1 Y/ O- j6. f 弧之长度为:' | p7 `; a# G; q1 r5 H
c. 65.43255 z7 x/ ^7 b0 {2 B# a& l
7. g 弧之长度为: 7 e3 \2 b5 ?6 e4 k b. 126.4051 # H! a9 p9 c" f6 ?! ?8. p 弧之长度为:% p5 C4 s8 c$ U) b" p; ] K: F
a. 117.8097