But online courses also have disadvantages. Now more and more people have formed myopia, and children are a part of it. Electronic products are used in the online class, which is very harmful to the eyes
But the network class also has disadvantages, now more and more people form myopia, children are also a part of it. And in the Internet class is the use of electronic products, it has a great harm to the eyes
But online classes also have disadvantages. Now more and more people are becoming nearsighted, and children are also part of it. In the online class, the use of electronic products is very harmful to the eyes<br>