段2：①As a result, the modern world is increasingly populated by intelligent gizmos whose presence we barely notice but whose universal existence has removed much human labor.
段3：①But if robots are to reach the next stage of :laborsaving utility, they will have to operate with less human supervision and be able to make at least a few decisions for themselves—goals that pose a real challenge. ②“While we know how to tell a robot to handle a specific error,” says Dave Lavery, manager of a robotics program at NASA, “we can’t yet give a robot enough ‘common sense’ to reliably interact with a dynamic world.”
49. Besides reducing human labor, robots can also
[A] make a few decisions for themselves.
[B] deal with some errors with human intervention.
[C] improve factory environments.
[D] cultivate human creativity.
答案：B
问：根据原文中的哪句话可以得出49题的正确答案？
A : 段2句①
B : 段3句①
C : 段3句②
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