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也出一题，给你二根导火索，每根可各燃1小时，但燃烧速度不一定均匀， based on this, 请测出45分钟来.

tongbuyong(通不用)

(#300794@0)
Last Updated: 2001-12-16
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也出一题，给你二根导火索，每根可各燃1小时，但燃烧速度不一定均匀， based on this, 请测出45分钟来.

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