题目内容

According to the dictionary named The Random House Dictionary of the English Language, communication is derived from the Latin word communicare which means “to ___________” or “to ___________.”

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Communication includes nine components, they are: sender/source, __________, channel, message, __________, __________, feedback, noise, __________.

Western cultures emphasize the ___________ function of communication;that is _____________.

紫外-可见吸收光谱是由于( )产生的

A. 分子价电子能级跃迁
B. 核外电子能级跃迁
C. 核的自旋能级跃迁
D. 分子振转能级的跃迁

下列化合物中能同时产生B、R、K三个吸收带的化合物是( )。

A. 苯乙酮
B. 苯酚
C. 乙烯苯
D. 丙酮

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