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High school media centre,USA
11696614 - High school media centre,USA
High school media centre,USA
11696615 - High school media centre,USA
High school ecology education,USA
11696626 - High school ecology education,USA
High school media centre,USA
11696618 - High school media centre,USA
High school media centre,USA
11696613 - High school media centre,USA
High school ecology education,USA
11696625 - High school ecology education,USA
High school media centre,USA
11696616 - High school media centre,USA
High school ecology education,USA
11696627 - High school ecology education,USA
High school chemistry lesson,USA
11696621 - High school chemistry lesson,USA
High school media centre,USA
11696617 - High school media centre,USA
Measuring reaction rate
11832022 - Measuring reaction rate
Adding acid to alkaline solution
11832012 - Adding acid to alkaline solution
Adding acid to alkaline solution
11832011 - Adding acid to alkaline solution
Work experience,USA
11696620 - Work experience,USA
Student using a quadrat
11832017 - Student using a quadrat
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