3 W9 P5 S1 U7 q) c! S求:" s( v* i) r4 s
1. a 值为何?# m6 a6 j+ q& d
a. 49.8293 b.49.8329 c. 49.8392! d! G( H; b: S2 O$ Y+ _
2. b 值为何? , T" |% t7 F5 v5 k) u a. 16.6667 b. 16.6676 c. 16.6766 . W# R+ N! t; z3. c 值为何? : y- G! x' f4 Q$ b8 X a. 38.4696 b. 38.6494 c. 38.9446 ) u$ u3 }/ L4 c) y3 W4. 蓝剖面线区域之面积为何? $ R Z/ u7 ~4 X" k( N a. 1067.3350 b. 1067.3305 c. 1067.3503