根据短文内容，判断下列句了正误。正确为“T”，错误为“F”。 What is an e-reader? An e-reader is a small computer. It can hold thousands of e-books. So people want to throw away heavy schoolbags and read with small, light e-readers. For example, a US high school has put its paper books away. Teachers and students are using e-readers now. 'It's so convenient. You can have so many books right at your fingertips.' said Meghan Chenausky,16. Chinese schoolchildren are also trying e-readers. Hanvon WISEreader is the most popular e-reader in China. It weighs about 260g and is as big as a regular textbook. It is a special e-reader. Students can make notes on it. They can use it to download textbooks from school computers. It can also send and receive homework. New e-readers are not just for reading. They have WI-FI (无线网络) and multimedia (多媒体). Parents think these may hurt children's study habits.' I think WI-FI is not necessary for kids.' says Zeng Wenwen, 43, Beijing. (     )1. An e–reader can keep thousands of e–books. (     )2. An e–reader can help to make schoolbags lighter than before. (     )3. In every US school, e–readers are used instead of paper textbooks. (     )4. The passage mainly introduces the size of an e–reader. (     )5. A different opinion is against the WI-FI and multimedia of e–readers.