B.Wikipedia to be beamed into space

　　C.Wikipedia,aliens’ best friend

　　D.Wikipedia to result in a disaster

　　Ⅱ.七选五

　　Mummy mystery

　　Something strange has been happening at the University of Tarapaca’s archeological museum in Chile.Over the past several years,the famous Chinchorro mummies have been rotting at an alarming rate.

　　　1　“We wanted to answer two questions,” scientist Ralph Mitchell said.“What was causing it and what could we do to prevent further degradation (降解)?” 

　　After months of testing mummy skin in the lab,Mitchell and his team believe they have solved the mystery.They say that extra humidity (湿气) is to blame.The wetter weather allows tiny living things called microbes to grow.　2　 

　　In the lab,the scientists exposed pig skin and then mummy skin to very humid air.After 21 days in the extra humid environment,both the pig skin and the mummy skin began to break down.Mitchell explained,“　3　” 

　　So,what do humid conditions in a lab have to do with the mummies’ home in the museum?The mummies are from a group of people called the Chinchorro,who lived along the coastal region between modern-day Peru and Chile,close to the Atacama Desert.The Atacama Desert is one of the driest places on Earth.　4　 

　　But experts say the area,which is also where the museum is located,has recently become extra humid due to climate change.In order to prevent the mummies from continuing to rot,Mitchell’s team says the humidity in the museum must be kept between 40 and 60 percent.

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