搜索 - 科创

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(4)某同学在实验室里过滤一种含固体物质的浑浊液，发现滤液仍很浑浊，其原因可能是：①_______________________________。

还有的学者认为只有磁场（B）的变化产生的电场才算法拉第定律，所以法拉第定律还有另外一个版本：这个版本的把原来对整个磁通量（B·da）的求导变成了只对磁感应强度B的求偏导，这就把磁感线通过曲面面积变化的这种情况给过滤了

如果选了这样的一位导师，你首先得把自己当作一个过滤器。竛导师提供了什么类型的研究组？有些教授会创造环境，把所有的学生聚集在一起，即使他们做的不是同一个项目。很多教授每周或者每两周与自己的学生们会面。

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