单项选择题

A．Graduate students.
B．Undergraduate students.
C．Professors.
D．Library employees.
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单项选择题
While playing back Karaoke, if there is acoustic feedback, we should turn the micro phone volume down and put the microphone farther away from the speaker.
A．Y
B．N
C．NG
单项选择题
The statement that every group has a culture grows out of the author’’s ____________.
A．bias in regard to civilized human
B．philosophy
C．feeling about human beings
D．definition of culture
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