题盒微课-免费下载海量北京市区级优秀微课资源及配套资料
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生活中的化学电源
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https://video.cache.bdschool.cn/vd/9f630742fba8b04880593fbaa3abe3ad.mp4
北京市
高中必修化学
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Jul 15, 2021
物质与酸与碱反应的规律
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