游泳比赛有哪些裁判人员?。

What officials are there in a swimming competition?

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跳水比赛有哪些裁判人员?。

What officials are there in a diving competition?

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举重比赛有哪些裁判人员？

What officials are there in a weightlifting competition?

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水球比赛有哪些裁判人员？

What officials are there in a water polo game?

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水球比赛有哪些裁判人员？

What officials are there in a water polo game?

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