题目内容
One should interrupt and try to help speakers who may have difficulty in saying what they want to say.
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It is unusual for Americans and Britishmen to use first name early in a business relationship.
It doesn't matter if you break certain social rules if it is clear that you are sensitive to other people.
Etiquette is the critical point in telephoning between dfferent cultures.
物体受同一平面上多个力作用，各分力力矩的代数和等于合力的力矩，这是（）
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