Sometimes, if speakers are so concentrated on delivering their presentations, they don’t need to care about the needs of their audience.
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Feedback is important in public speaking because it allows you to know if you are successful in being understood.
A. 对
B. 错
Eye contact helps establish a personal connection, and even a quick glance can keep people engaged.
A. 对
B. 错
下列关于维生素叙述正确的是
A. 维生素能氧化供能
B. 维生素主要在人体内合成
C. 维生素可以参与组织细胞的构成
D. B族维生素的主要功能是构成辅酶或辅基
夜盲症是由于缺乏
A. 维生素C
B. 维生素E
C. 维生素A
D. 维生素D
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