满意回答
signs and rules are very important to all people .
Signs tell us insturctions ,directions warnings and informationd.Signs are over world ,we can see signs in the swiming pool ,in the clas...
满意回答
signs and rules are very important to all people .
Signs tell us insturctions ,directions warnings and informationd.Signs are over world ,we can see signs in the swiming pool ,in the clas...
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