Same goes for surgeons, whore using robotic systems to perform an ever-growing list of operationsnot because the machines save money but because, thanks to the greater precision of robots, the patients recover in less time and have fewer complications, says Dr. Myriam Curet.

Surgeons may survive the robot invasion, but others at the hospital might not be so lucky, as iRobot, maker of the Roomba, a robot vacuum cleaner, has been showing off Ava, which could be used as a messenger in a hospital. And once youre home, recovering, Ava could let you talk to your doctor, so theres no need to send someone to your house. That mobile telepresence could be useful at the office. If youre away on a trip, you can still attend a meeting. Just connect via videoconferencing software, so your face appears on Avas screen.

Is any job safe? I was hoping to say journalist, but researchers are already developing software that can gather facts and write a news story. Which means that a few years from now, a robot could be writing this column. And who will read it? Well, there might be a lot of us hanging around with lots of free time on our hands.

52. What do we learn from the first few paragraphs?

A) The over-use of robots has done damage to American economy.

B) It is hard for robots to replace humans in highly professional work.

C) Artificial intelligence is key to future technological innovations.

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