5,6,7,

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5,6,7,5,6,7, 5,6,7,

5,6,7,
5,6,7,

5,6,7,

6,10,7,5 8,6,7,5,( ) ( ) 5 6 7 5,6,7,8, 5 6 7 5 6 7题 4,5,6,7, 5,6,7 5,6,7题, 第5,6,7, 4 5 6 7 5 6 7 8 4 5 6 7 5,6,7,8, 5,6,7,8, 5 6 7 8 5,6,7,8, 选择5 6 7