The author believes that plural marriages occur on substantial scales only in societies in
A. polygyny is not prohibited
B. one sex greatly outnumbers the other
C. most people are undereducated
D. a minority of people are very rich and powerful
电影的物质基础包括透视成像、视觉暂留、()。
A. 视觉感光
B. 视听融合
C. 视听成型
D. 反馈刺激
Which of the following utters a face—threatening feeling？________
A. You are not doing well this time，but you will be OK．
B. Jane always phones her boyfriend at work．
C. You seldom have time even talking to me
D. You look pretty today．Where did you get the smelter？
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