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Introduction of pH
Author:
Alex CHIK
GeoGebra
http://www.geogebra.hk
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兩組對邊相等和有直角的四邊形
兩位數除以一位數（二）
算柱 (兩位數)
球體建築師
兩位數加法
Discover Resources
認識小數
科博館的水畢氏三角
勝者即正義，可愛即正義～(可用Ctrl+滑鼠滾輪放大界面)
Bisects Chord
謝爾賓斯基三角形
Discover Topics
Matrices
Statistics
Surface
Frequency Distribution
Intersection