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S5_化學_CH47_A_週期表內第I族至第0族各元素的鍵合本質和結構
Motion - Example 2
F2-change of subject
S4_化學_CH9_F2_利用物質的性質來推斷它們的結構和鍵合
Grating
S4_化學_CH8_C3_共價分子的化學式及其預測
DSEPP_市場干預
CH3 Radian
Electric charges
YU CHUN KEUNG MEMORIAL COLLEGE