鐘打4下,要3秒,咁鐘打7下,要幾多秒呢?- b; o+ M: |2 d3 O& x$ @: `
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0 Q$ E( o, V( V) X0 R8 F8 a鐘打4下,要3秒,咁鐘打7下,要幾多秒呢?^^; t+ X+ R) z' K
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答左回覆先好看答案呀^_^,唔係冇引咖啦- -v
8 K2 p2 u0 i: R8 B7 q' T) J( n7 T4 t5.39.217.775.39.217.77( N1 G2 t3 \1 ^
ans: 6 |