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Howard Clock
Author:
Chan Wing Ho
撥動鐘面，輸入鐘面上指示的時間。 輸入時間，依時間撥動鐘面。 Information for other teachers: 讓學生認識如何從鐘面報時，及如何在鐘面顯示指定的時間。
柯志明 香港教育局 教育基建分部
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