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1 A B 80 C D A B C D A B C D A B C D

2 A 5 B C D / 18 / l5 / 24 / 2 16 A B C 2 16 l2 31 D A B C D 8 A B C D 9 A B C D 10 A B C D l2 31 A 2 400

3 B C D A B C D A B C D 2 A B C D l A B C D A B C D

4 A B C D / A B C D A B C D A 2 17 B C D A 280 B 40 C 50 D 600

5 10 A B C D l

6 l

7

8 = = / 0.8 / 1 / 0.2 /

9 D A B C D = =4 <25 2 B A B C D 3 A A 4 A A 5 C 6 B 7 D A B C 8 B A B C D 9 B B 10 C 11 A = = = = l C

10 1 BC A D 2 ABC A B C D 3 ABCD / =600 60= = =480 4 AC B D ACD B 1 6 ABD C 7 ABC A C = = B D ABC D 9 BCD

11 ABC D A B C = = = =11O % = = = =4 925 = =4 710 = =

12 [ ] = = = = = = = =

13 = = [ ] [ ] (4) ( ) ( )

14 = =1 300( ) = =1 950( )