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讲义练习资料 2022-10-15 14:05:47 | |||
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1.神奇的化学世界.flv | 2022-10-15 14:05:47 | 525.57MB | |
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10.生命之源――水.flv | 2022-10-15 14:05:47 | 406.63MB | |
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11.初识质量守恒定律.flv | 2022-10-15 14:05:47 | 388.52MB | |
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12.质量守恒定律的应用.flv | 2022-10-15 14:05:47 | 337.99MB | |
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13.化学方程式计算.flv | 2022-10-15 14:05:47 | 350.37MB | |
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14.综合复习.flv | 2022-10-15 14:05:47 | 396.68MB | |
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2.走进化学实验室.flv | 2022-10-15 14:05:47 | 548.41MB | |
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3.我们周围的空气.flv | 2022-10-15 14:05:47 | 530.25MB | |
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4 氧气的性质.flv | 2022-10-15 14:05:47 | 328.33MB | |
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5.神奇的氧气.flv | 2022-10-15 14:05:47 | 402.70MB | |
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6.看不见的微观世界.flv | 2022-10-15 14:05:47 | 491.87MB | |
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7元素的认识.flv | 2022-10-15 14:05:47 | 388.24MB | |
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8.化合价与化学式.flv | 2022-10-15 14:05:47 | 377.42MB | |
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9.化学式计算.flv | 2022-10-15 14:05:47 | 364.70MB | |