17.阅读下面的材料, 判断下列句子是否符合短文内容.符合的写T, 不符合的写F.(T = True, F = False)
E-book is short for electronic (电子) book. It is usually read on personal computers. Some mobile phones can also be used to read e-books.
Earlier e-books were written for a certain group of readers and were about only a few subjects. With the development of the Internet, knowledge and answers to a lot of questions mainly come from e-books. This is why the e-book business is increasing quickly.
E-books have many advantages. First, they save time. We don't need to go a bookstore to buy books. Second, we can find the topic we want to know about on the Internet, and then we can quickly get many e-books on similar topics. Third, e-books save money. Some e-books cost us little money, and there are millions of e-books on the Internet that we can get for free. Fourth, more trees are saved because e-books don't need to be printed on paper. Besides, e-books make reading more convenient. You can carry a whole library of hundreds of books with you in a small computer or any e-book reader (阅读器), without worrying about their weight.
But e-books have certain disadvantages. They need a personal computer or an e–book reader, and the information can be lost if its file format (文件格式) is not supported (支持) or changed in the reader's computer.
However, e-books provide us with a new way of reading. That is good.