单项选择题

According to the passage, Poseidon saves a life by ______.

A．plunging into the pool
B．alerting the lifeguard
C．crying for help
D．rushing to the pool
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单项选择题
It could be inferred from the first paragraph that ______.
A．lifeguards often failed to notice the people who get drowned
B．AI is an idea invented by a French company
C．anyone in the water can be saved by the AI
D．people often get drowned in Britain
单项选择题
What is required of AI software to save a life
A．It must be able to swim.
B．It must keep walking round the pool.
C．It can distinguish between a swimmer and a shadow.
D．It can save a life within a few months.
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