Pusat Sumber Sekolah SJKC St. Michael & All Angels, Ipoh, Perak. 小小努力,立足本地,放眼世界。 Knowledge has to be improved, challenged, and increased constantly, or it vanishes
Knowledge has to be improved, challenged, and increased constantly, or it vanishes.
Peter Drucker
科学史上的今天 Today's Science in History 科学小组与资源中心协作转发
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