单项选择题

A．Practical experience and ability.
B．Years of patient practice.
C．A degree certificate.
D．A set of course of instructions.
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单项选择题
A．Linguistics.B．Politics.C．Psychology.D．Literature
A．Linguistics.
B．Politics.
C．Psychology.
D．Literature
单项选择题
A．To protect persons and property.B．To collect taxes.C．To teach and train citizens.D．To save natural resources for future use.
A．To protect persons and property.
B．To collect taxes.
C．To teach and train citizens.
D．To save natural resources for future use.
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