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(2015年·哈九中三模)从1,2,3,4,5,6,7,8,9中不放回地依次取2个数,事件A=“第一次取到的是奇数”,B=“第二次取到的是奇数”,则P(B|A)=(  )

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4  2  ﹣2  ﹣4  
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{0}  {0,3}  {﹣1,0,3}  {0,3,4}  
8,2,3,4,5,6,7,1  5,6,7,8,1,2,3,4  1,2,3,4,5,6,7,8  8,7,6,5,4,3,2,1  
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