Decide whether each of the following statements is true or false based on the information in the passage. Write "T" for true or "F" for false in the space provided.
1. An infection of a virus may turn your life upside down. 2. A house protecting computer system only recognizes the owner of the house by his retina. 3. The police are very interested in the recent credit card purchase because they know the owner is a rich man. 4. The targets of computer hackers are computers rather than human beings. 5. Computer hackers are very clever people who can do precise calculation to get passwords. 6. A well-chosen password can always protect you from becoming a victim of computer hackers. 7. "Trojan horse" is used by hackers to collect information of their targets. 8. The smarter your mobile phone is, the greater danger you are putting yourself into.
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