do you guys know something? i am gonna participate in a science exhibition for the first time, oh no! now you wanna know what i am making, OK let me say it to you,it is a secret, but no problem, so i am actually making a working model of an earth quake alert system, it is like the alarm goes on when we shake it.Actually i don't have much expectations.But i hope everyone likes it.please pray for me.
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