第二篇 Cell Phones : Hang Up or Keep Talking? Millions of people are usingcell phones today. In many places it is actually considered unusual not to useone. In many countries, cell phones are very popular with young people. Theyfind that the phones are more than a means of communication-having a mobilephone shows that they are cool and connected. The explosions around theworld in mobile phone use make some health professionals worried. Some doctorsare concerned that in the future many people may suffer health problems fromthe use of mobile phones. InEngland.there has been a serious debate about this issue. Mobile phone companies areworried about the negative publicity of such ideas. They say that there is noproof that mobile phones are bad for your health. On the other hand, why dosome medical studies show changes in the brain cells of some people who usemobile phones? Signs of change in the tissues of the brain and head can bedetected with modern scanning(扫描) equipment. In one case, atraveling salesman had to retire at a young age because of serious memoryloss.He couldn't remember even simple tasks. He would often forget the name ofhis own son. This man used to talk on his mobile phone for about six hours aday,every day of his working week,for a couple of years. His family doctorblamed his mobile phone use,but his employer's doctor didn't agree. What is it that makes mobilephones potentially harmful? The answer is radiation. High-tech ma- chines candetect very small amounts of radiation from mobile phones. Mobile phonecompanies agree that there is some radiation,but they say the amount is toosmall to worry about. As the discussion about theirsafety continues,it appears that it's best to use mobile phones less often. Useyour regular phone if you want to talk for a long time. Use your mobile phoneonly when you really need it. Mobile phones can be very useful andconvenient,especially in emergencies. In the future, mobile phones may have awarning label that says they are bad for your health. So for now,it's wise notto use your mobile phone too often. People buy cell phones for the following reasons EXCEPT that