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带电粒子在匀强磁场中的运动
Forfatter
陈辉
GeoGebra
Nye Materialer
異分母分數減法
兩位數除以一位數（二）
找出對稱軸
畫出對稱圖形
拼砌四邊形
Opdag Ressourcer
正多邊形滾動
Taiwan go
Relationships between chords and their distances from centre
三角形的五心
直角坐標的旋轉變換
Udforsk emner
Vektorer
Subtraktion
Rombe
Parabler
Rumfang