单项选择题

A．She didn’’t go to work this morning.
B．She was injured and had to go to the hospital.
C．She talked with the boss in the morning.
D．The traffic delayed her.
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单项选择题
It is a general law of nature that a male animal and a female animal unite, and they remain united until the young no longer need their joint assistance.
A．Y
B．N
C．NG
单项选择题
The new trend in artificial intelligence research stems from ______.
A．the shift of the focus of study on to the recognition of the shapes of objects
B．the belief that human intelligence cannot be duplicated with logical, step-by-step programs
C．the aspirations of scientists to duplicate the intelligence of a ten-month-old child
D．the efforts made by scientists in the study of the similarities between transistors and brain cells
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