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It won't make a difference, if you're worried just change positions.
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Sorry, I don't know.
If you want to study it as a scientific topic, you can choose some days with high, medium and low winds, and repeat the test. Place 10 bank cards on the balcony (of course it's a similar card, otherwise it would be a tragedy if it really blows away), and after 1 day it was observed that there were n left, Prob = 1-n 10To speed things up, you can use a fan to simulate the wind.
Generally not, the bacteria are killed by sunlight.
Of course, the broom is not responsible, and the person who puts the broom is responsible.
It won't be the cigarette butts thrown upstairs, and the fireworks downstairs.
It is best not to eat, if you are reluctant to lose it, you can use a pressure cooker to press it for 25 minutes, and you can also eat it. It's just that I feel uncomfortable.