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Draw a warning sign for the classroom, which means "Don't talk loudly"

1. Please don't make noise and keep quiet!

Talking in a low voice is good for others and good for yourself.

3. Quiet creates the beauty of harmony

Be polite and don't make noise.

5. Be quiet when you enter the room, and be safe when you sit down.

6. Be quiet, cultivate one's morality. Please be self-disciplined.

Hope to adopt, thank you! ~