39．According to the doctor，________.

　　A．the painful elbow caused by mobile phone can't be cured

　　B．only white­collar workers turn up with the painful elbow

　　C．long time of using mobile phones possibly causes the painful elbow

　　D．if your elbows are painful, or you can't raise your hands, you catch the disease

　　解析　细节理解题。从最后一段的最后一句可知长时间使用手机的人易患”手机肘”这种病。

　　答案　C

　　B

　　If cars had wings，they could fly and that just might happen, beginning in 2011.The company Terrafugia, based in

　　Woburn, Massachusetts, says it plans to deliver its car­plane,

　　the Transition, to customers by the end of 2011.

　　“It's the next‘wow’vehicle，”said Terrafugia vice president Richard Gersh.“Anybody can buy a Ferrari, but as we say, Ferraris don't fly.”

　　The car plane has wings that unfold for flying—a process the company says takes one minute—and fold back up for driving.A runway is still required to take off and land.

　　The Transition is being marketed more as a plane that drives than a car that flies, although it is both.The company has been working with FAA to meet aircraft regulations, and with the National Highway Traffic Safety Administration to meet vehicle safety regulations.

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