单项选择题

Humans and robots worked together in many areas of work because （）

A．robots never complain about the tiring work
B．the management can pay little and benefit a lot
C．it is dangerous for humans to do some harmful work
D．they have their own weaknesses and advantages

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单项选择题
The central idea conveyed in the passage is that （）

A．although robots can do much dangerous and tiring work, humans are superior
B．although humans are superior, robots can do much better in many areas of work
C．robots will replace humans in more and more fields
D．robots are superior to humans because they can do much work that humans can't do
单项选择题
It can be inferred from the passage that all the work on the assembly line was （）

A．dangerous and dull
B．harmful but beneficial
C．repetitive and dull
D．easy but tiring
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