井邊有容量5公升跟3公升的兩個水桶,506Please respect copyright.PENANAaY6p4AZ8pS
該如何利用這兩個水桶,裝出剛好4公升的水呢?506Please respect copyright.PENANAjmynhHhKLF
506Please respect copyright.PENANArfyKt9As9w
井邊有容量5公升跟3公升的兩個水桶,506Please respect copyright.PENANAaY6p4AZ8pS
8964 copyright protection502PENANAhW7TyrceDh 維尼
該如何利用這兩個水桶,裝出剛好4公升的水呢?506Please respect copyright.PENANAjmynhHhKLF
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506Please respect copyright.PENANArfyKt9As9w
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