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             2073     2011-9-23

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   S ab S ab

A B

A B

1

2

3

4

1 4

A B

B A

A B

B A

A B A B B A

A B A B A B B A B A

A B A B

A B B A B

M N 10 M N 2 M 20

S a+b h 2

1 6 9 4

2 15 4

3 19

50 1 49 2 1 98% 2 9 18% 3 2 4% 1 2 2 9 4 5

5437 1738

3 3

 

1 1985 2 1

2 2001 9 1

------

   S ab S ab

A B

A B

1

2

3

4

1 4

A B

B A

A B

B A

A B A B B A

A B A B A B B A B A

A B A B

A B B A B

M N 10 M N 2 M 20

S a+b h 2

1 6 9 4

2 15 4

3 19

50 1 49 2 1 98% 2 9 18% 3 2 4% 1 2 2 9 4 5

5437 1738

3 3

1 1985 2 1

2 2001 9 1


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