III.阅读理解

　　Since the Internet came into homes，the daily life has never been the same again.But the thing that worries most of us is that we can get viruses from the Internet.But can we catch viruses on our cell phones? A new study in the journal Science says yes，but the spread of such mobile software that can bring harm to our cell phones won't reach dangerous levels until more cell phones are on the same operating system.

　　Computers are easily attacked by viruses because they share data，especially over the Internet.Of course，nowadays，more people are using their cell phones more and more frequently.They use them for emailing，text messaging and downloading ring tones，etc.，so it is evident that cell phone viruses are a threat as well.

　　Scientists used nameless call data from more than six million cell phone users to help model a possible outbreak.And they concluded that viruses that spread from phone to phone by Bluetooth are not much concerned，because users have to be in close physical relation for their phones to "see" one another.However，viruses that spread through multimedia messaging services can move much faster，because they can come in disguise(伪装)，such as a cool tune sent by a friend.The good news is that to be effective，these viruses need their victims(受害人) to all use the same operating system，which not enough of us do.Thank goodness.

　　【语篇解读】　互联网时代改变了人们的生活，可是人们在上网的时候最害怕的就是让自己的设备感染上病毒。

　　1．What is the passage mainly about?

　　A．The operating system of cell phones.

　　B．The threat of cell phone viruses.

　　C．The wide use of cell phones.

　　D．Computer viruses.

　　B　[主旨大意题。根据全文来看，从文章开头到结尾作者主要围绕着手机病毒的威胁来提出设问、并利用科学家实验证明。]

2．When ，cell phone viruses can be dangerous.