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When is the national junior high school Olympic Games exam?
When is the national junior high school math Olympic exam?

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When are the preliminary and semi-finals of the national junior high school chemistry Olympic competition?

Preliminaries: 3.23 rematch: 4.6

What is the time for the preliminary and semi-final of the national junior high school applied physics knowledge competition?

Heat: 3. 16 rematch: 3.30