单项选择题

A．Information about diseases.
B．Knowledge of specialists.
C．Patients’ specific symptoms.
D．Knowledge of medical textbooks.
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单项选择题
A．The effects of the flood.B．The heroic fight against a flood.C．The cause of the flood.D．Floods of the past twenty years.
A．The effects of the flood.
B．The heroic fight against a flood.
C．The cause of the flood.
D．Floods of the past twenty years.
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