题目内容：
根据提示，完成填空：Handshakes are firm and accompanied by a smile and direct eye contact. This establishes credibility, conveying (26)__.( 自信) and sincerity. In terms of a conversational "comfort zone", Americans (27)p__ to keep at an arm's length distance, although they may touch another's arm as a gesture of (28)__(温暖) or to emphasize a point.
In some cultures the degree of formality (29)i __ as one climbs the hierarchy. Not so in the U.S.A. where there is less "power-distance" between ranks. (30)__do you detect "who is the boss" in a meeting? Not by seating (31) __(安排) or displays of respect, but by the relaxed yet authoritative style.
In terms of nonverbal gestures, it is (32)d__to generalize across regions without lapsing into stereotypes, but here goes. The Texans are well-known for their backslapping bonhomie, Midwesterners are more self-contained, Italian Americans gesticulate with their arms more (33)__ German Americans. High-riving is a commonplace among close friends, although a little gauche for the baby-boom generation.
Nonverbal gestures are always a cross-cultures minefield. For example, to indicate "good", an American might form thumb and forefinger into an "o" shape, a gesture that could be (34)c__
offensive else where better to stick (35)__ the universal thumbs up to express approval.
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