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180417-概念课-22150615

Added by 8 年 ago

315 Views8 Comments

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180525-气压带与风带-22151008

Added by 8 年 ago

301 Views9 Comments

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180605-生长素的发现-22150920

Added by 8 年 ago

218 Views0 Comments

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180612-染色体数目变异-10150406

Added by 8 年 ago

193 Views0 Comments

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190329-燃烧与灭火(第二课时)-22160815

Added by 7 年 ago

142 Views0 Comments

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190604-振动图象和波的图象比较复习课-22160713

Added by 7 年 ago

121 Views0 Comments

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20200329-氧化还原反应-22170841

Added by 6 年 ago

68 Views7 Comments

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200412-大气的受热过程-10180638

Added by 6 年 ago

83 Views0 Comments

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200516-溶液的形成-09170421

Added by 6 年 ago

51 Views7 Comments

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200519-氧化还原反应-22170840

Added by 6 年 ago

50 Views9 Comments

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