如何避免感冒英语作文

如何避免感冒英语作文
It has been a hot topic in recent years.E-book is becoming more and more popular.Some people even think that traditional book will replaced by E-book.
E-book is useful and has almost changed our way of living.There are some adventage of E-book.E-books are much cheaper and more convenient.As we know,they are much easier to take.
Everything has two sides and E-book is not an exception.E-book has bad effect on people's eyes.And there are more radiation which is harmful to people's body.
In my opinion,E-book cannot take the place of traditional book,but it's an useful product.