2. 外语
  3. What does the passage mainly discuss? The passage suggests that the speed at which communication through pheromones occurs is

What does the passage mainly discuss? The passage suggests that the speed at which communication through pheromones occurs is

admin2004-12-28  91
问题  What does the passage mainly discuss?
  The passage suggests that the speed at which communication through pheromones occurs is dependent on how quickly they
选项 A、lose their effectiveness
B、evaporate in the air
C、travel through the air
D、are produced by the body
答案C
解析
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