阅读理解

　　It’s Friday morning in the year 2025, and you're running late．You get distracted(分心的)watching the music video that is playing in the corner of your bathroom mirror while you are brushing your teeth．How will you get to your office on time?

　　A quick check of your Internet-connected screen tells you your train which travels at a speed up to 400 kilometers an hour is a bit behind schedule, too．So you decide to drive your environmentally-friendly hydrogen fuel car instead－or rather, let your car drive you．It's programmed to know the way, and it will get you there without speeding, getting lost, or crashing．

　　Settling into your office chair, which changes color to match what you're wearing, you pick up yesterday's newspaper．Printed on reusable electronic paper, it instantly rewrites itself with today's headlines．Now it's time for your big meeting．Uh-oh! You've left your handwritten notes at home．No problem．The digital ink pen you used has stored an electronic copy of what you wrote．

　　Your wristwatch videophone suddenly rings．Your best friend's face turns up on the small screen, asking what you're doing this weekend．Will you wear your 3-dimensional contact lenses(三维隐形镜)and play soccer with the U．S．Olympic team? No, no, your friend replies．So you have to take the new nanotube(纳米的)elevator(which is made of materials many times stronger than steel)and travel 96 000 kilometers high into space．

　　Could this scene really take place in just a couple of decades? The researchers who are currently developing all this stuff think so．These devices may be as common in 20 years as cell phones and DVD players are today．

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