阅读下列短文，从每题所给的四个选项(A、B、C和D)中，选出最佳选项。

　　Clean your ears, because airport security might soon be scanning them．According to a recent discovery, the shape of ears could provide a reliable new way of identifying people at airports．

　　Researchers discovered that ears of each person have a unique shape and they have created a system that can scan them．The ear scanning technique uses a technology called image ray transform that highlights all the tubular structures(结构)of the ear and measures them．Professor Mark Nixon, a computer scientist who led the team from the University of Southampton, believes ear scanning could take place as passengers walk through security gates, for example, by placing cameras on either side to record an image of their ears．Comparing the results against a database of ear shapes, the new system could help airport security workers instantly identify passengers．

　　Nixon and his team tested 252 images of different ears and found the system was able to match each ear to a separate image held in its database with 99 percent accuracy．

　　Besides ear scanning, there have been other systems developed for identity recognition．

　　“With facial recognition, the systems are often confused by crows feet(鱼尾纹)and other signs of ageing,” Nixon said． “Your ears, however, age very gracefully．They grow proportionally(按比例)and your lobe(耳垂)gets a bit larger, but otherwise your ears are fully formed from birth．” What's more, facial recognition software is often confused by changes in expression so people need to control their faces and in some cases even avoid wearing make－up．

　　An ear scan system would also offer a less invasive alternative to retina(视网膜)scanning, which requires passengers to stare at scanners from a close range．

　　Fingertip detection has long been the most effective way of identifying someone．Nixon expects there to be a combination of different techniques that can be used at the same time to identify a person．”

请阅读下列短文，从每题所给的四个选项(A、B、C和D)中，选出最佳选项。

　　Edgar felt quite excited at the thought of his first swim of the summer．With the sun shining down so strongly, the sea was certain to be warm enough．He walked quickly along the sea-front towards the steps that led on to the sands．He smiled carefully at the passers．He had just smiled and raised his hat to an elderly lady when a man with a camera caught his arm and stopped him．Edgar heard a little buzzing noise from the camera．

　　“Your photograph, sir, in glorious color in just one moment if you please,”said the man in one breath．

　　Then the buzzing stopped, and he held the photograph in his hand and was waving it to and fro．In a moment he handed it over, and Edgar saw the bright blue splash(色斑)of his shirt half filling the picture．

　　“Seventy pence, sir,”the man said．“It's the bargain of your holiday．”

　　“Seventy pence,”Edgar repeated, mildly,“for this?”he stared at the photograph．

　　“They're normally eighty-five, sir, but for a single subject I make a cut-price offer．It's the best value you'll get in Chadwell．”“You'll have to make a better offer,”Edgar said．It was a good photo though, he thought, so bright and clear．His hat was held high, and he was smiling broadly to the old lady, whose arm and handbag came into a lower corner．He had had no idea that he was being snapped(快照)．He thought he was really quite a good-looking chap(小伙子)．

　　“That's as good as any studio job that would cost you pounds,”said the cameraman,“it's better in a way because it's so natural．Only seventy pence, sir．”

　　“I've never paid so much for a snap in my life．It simply isn't worth that kind of money．It's not as if I need the thing．Look, I'll give you twenty-five．”

　　“No, I can't do that．Each of these instant colour shot costs me 50P－that's the blank frame(结构), so you see…”

　　“Criminal, criminal,”Edgar broken in．“You want a profit(利润)of forty percent．Well, not at my expense, I'm afraid I'll give you your 50P and that's that．”

　　“Let me see, then．”The man suddenly took the photograph out of Edgar's hand．“I can't waste any more time with you．It's 70P or I keep it．”

　　“Keep it,”Edgar said．He turned, looked out to sea, then walked quickly away．