Giúp em vs ạ em cảm ơn

d.Amazone.com 7.Which of the following is not a valid domain name? a.www.yahoo.com, b.www.yahoo.co.uk c.www.fr.yahooyt d.www.yahoo.fr I 8. What would you use for immediate, real-time communication with a friend? 9. How can you catch a computer virus? 10. What is the difference between ...