单项选择题

Sony's QRIO could carry out all the following work EXCEPT

A．walking freely as it wishes.
B．understanding a few voice commands.
C．navigating automatically.
D．resuming walk when it falls over.
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From the passage we may infer that the Toyota's Partner
A．is much better than any other robots.
B．is no more than a mechanic device.
C．may be put into mass production.
D．may have some practical value.
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Judging from the context, this passage is probably written
A．in 2004.
B．in 2005.
C．between 2003-2004.
D．between 2004-2005.
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