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Diary作文250字
Today is a sunny day.I am writing a diary now.
This diary is about a thing happened in yesterday.
Just in yesterday,about 9:00 P.M.
I was chatting with my friend,ZMY.She is a girl and I am a boy.
In fact,she just call me for help.She offer some problems to me,and hope to know how to deal with it.
Then I came to have a look.They are some problems about chemical.Right,her chemical is not good.
The first question:"How to make CO2?"
It's a easy question,we can use HCl and CaCO3 to make it on.
Some times later,it's about 10:00 P.M.we went to bed and said "Good night" each other.
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