przez charleneliu » 23 kwi 2020, o 08:44
As to some students, some of them even use the phones to play games in the class, when they should focus on their study instead. In this case, parents and teachers have taken some measures to limit the time that children spending on the cell phones, among which the mobile phone signal blocker has been the first choice for them. Not only in classroom, examination room, and the has been widely used in many other occasions.
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