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阅读短文，回答问题
Welcome
back to school. I'm excited to see you again. We might be scared or upset when facing
the COVID-19 outbreak. But we were also strong and helpful. Many common people including
you teenagers are playing an important role in the fight. All of us stayed at home
in order to cause no trouble. You even finished an unbelievable event that
never happened before, studying online at home. Thank you all.
As
we all know, spring always puts an end to winter. Thanks to our great country, the
classes finally shifted from online to offline. Enjoy your school life from now
on. But in the special time, we have to follow the rules around the school.
◆Wear
a face mask wherever you go.
◆Take
your temperature twice a day.
◆Keep
your distance（距离）from others about one meter.
◆Don't
touch your eyes, nose and mouth.
◆Wash
your hands often with soap and water for at least 20 seconds.
◆Go
to the infirmary（医务室）if you are sick.
Most
importantly, be positive. Things are getting better and better now.
