单项选择题

A．About 72,000.
B．About 17,855.
C．About 75,000.
D．About 650,000.
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单项选择题
A．Doctor and patient.B．Chemist and patient.C．Nurse and patient.D．Physician and patient.
A．Doctor and patient.
B．Chemist and patient.
C．Nurse and patient.
D．Physician and patient.
填空题
objection
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