鐘打4下,要3秒,咁鐘打7下,要幾多秒呢?
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7 P5 U3 R- [- x4 P& G* _0 z+ Q鐘打4下,要3秒,咁鐘打7下,要幾多秒呢?^^! O7 ]# A! ?! ?# b x, j
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答左回覆先好看答案呀^_^,唔係冇引咖啦- -v
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