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
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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？
能够将细菌区别为革兰氏阳性菌或革兰氏阴性菌的染色方法是
A. 革兰氏染色法
B. 瑞氏染色法
C. 抗酸染色法
D. 姬姆萨染色法
E. 柯兹洛夫斯基染色
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