第2部分：阅读判断（第1～7题，每题1分，共7分）

　　下面的短文后列出了7个句子，请根据短文的内容对每个句子做出判断：如果该句提供的是正确信息，请选择A；如果该句提供的是错误信息，请选择B；如果该句的信息文中没有提及，请选择C。

Batteries Built by Viruses

　　What do chicken pox，the common cold, the flu，and AIDS have in common? They’re all disease caused by viruses，tiny microorganisms that can pass from person to person．It's no wonder that when most people think about viruses, finding ways t0 steer clear of viruses is what's on people's minds．

　　Not everyone runs from the tiny disease carders, though．In Cambridge, Massachusetts, scientists have discovered that some viruses can be helpful in an unusual way．They are putting viruses to work, teaching them to build some of the world's smallest rechargeable batteries．

　　Viruses and batteries may seem like an unusual pair，but they're not so strange for engineer Angela Belcher，who first came up with the idea．At the Massachusetts Institute of Technology (MIT) in Cambridge, she and her collaborators bring together different areas of science in new ways．In the case of the virus-built batteries, the scientists combine what they know about biology, technology and production techniques．

　　Belcher's team includes Paula Hammond，who helps put together the tiny batteries, and Yet-Ming Chiang， an expert on how to store energy in the form of a battery．“We’re working on things we traditionally don’t associate with nature．” says Hammond．

　　Many batteries are already pretty small．You can hold A．C and D batteries in your hand．The coin—like batteries that power watches are often smaller than a penny．However。every year，new electronic devices like personal music players or cell phones get smaller than the year before．As these devices shrink, ordinary batteries won't be small enough to fit inside．

　　The ideal battery will store a lot of energy in a small package．Right now，Belcher's model battery，a metallic disk completely built by viruses，looks like a regular watch battery．But inside，its components are very small—so tiny you can only see them with a powerful microscope．

　　How small are these battery parts? To get some idea of the size，pluck one hair from your head．Place your hair on a piece of white paper and try to see how wide your hair is—pretty thin，right? Although the width of each person's hair is a bit different，you could probably fit about l o of these virus—built battery parts，side to side，across one hair．These microbatteries may change the way we look at viruses7．

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