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是我刚刚看的不够仔细。不过，当你各拿掉两个时，重的那边还是重，轻的那边还是轻，你怎么把范围缩小到两个呢? 要么是A1A2重，要么是B1B2轻，但你只有一次机会了。呵呵！
laoyou
(老油)
(#48482@0)
Last Updated: 2001-4-18
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