The problem, according to Willow Garage, is the lack of a common platform for all that computational effort. Instead of enlarging the capabilities of a single machine, everyone is designing robots and the software to control them, from the ground up. To help change this, Willow Garage is currently producing 25 copies of its model PR2 (for “Personal Robot 2”), a two–armed, wheeled machine that can switch off the electricity, open doors and move through a room. Ten of the robots will stay in–house, but 10 more will go to outside research groups, and everyone will share their advances. This way, Berger says, if you want to build the robotic equivalent (等同物) of a Twitter (推特网站), you won’t start by constructing a computer. “you build the thing that’s new.”

　　31．The robots are mentioned to do some specific jobs EXCEPT in

　　.

　　A．battle fields

　　B．operation room

　　C．people’s houses D．wild fields

　　32．The multipurpose robot may be identified as a machine that

　　.

　　A．can move about in changing environments and work with their hands

　　B．can make sense of data gathered by a variety of sensors

　　C．has a huge set of abilities to finish all the simple tasks

　　D．has identifying laser scanners, searching cameras and force feedback

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