发布时间:2025-01-31 21:47:01
首先,你得检查一下,是不是新装修不久的房子,如果是肯定就是甲醇,苯系物等有害气体超标。如果是老房子,那么就是里面有新的家具,甲醇超标。如果都不是以上情况,那么就是外面有害气体近来。记得点赞哦
小红和小明在学习欧姆定律的过程中分别进行下列探究活动①小明选了以下器材等测电阻rx510Ω
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