题目内容

The term for nonverbal communication by means of gestures and other body movements is

A. Calisthenics.
B. Locomotion.
C. Kinesics.
D. Actuation.

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When delivering a speech, which of the following means of support is MOST likely to require the use of visual aids?

A. Statistics.
B. Hypothetical examples.
C. Testimony.
D. Extended examples.

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光纤的损耗决定光纤通信系统的传输速率。

消光比是光发射机的主要性能指标。