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单选题

What is the first part of communication style mentioned by the speaker?

A. Commujnication by speech.
B. Non-verbal communication.

单选题

What does non-verbal communication include apart from facial expressions?

A. Gestures, seating arrangements, personal distance, and sense of time.
B. Seating arrrangements, personal distance, and sense of time.

单选题

Who often feel that raising their voices means an exciting conversation among friends?

A. Some black, Jewish and Italian Amercians.
B. Some white Americans.

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