单项选择题

According to the passage, in the gist century, robots may be able to ______.

A．make more accurate diagnoses
B．perform intricate operations
C．monitor people's DNA
D．treat diseases like brain tumors, epilepsy, movement disorders and stroke

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单项选择题

Why does the author mention the discovery of AIDS in the last paragraph

A．To give an example of an incurable disease.
B．To illustrate the importance of preventative methods.
C．To exemplify a disease prevalent in the wealthy nations.
D．To use it s comparison to quickly spotted diseases.