2. 外语
  3. What does the passage mainly discuss? According to the passage, why do ants use different compounds as trail pheromones?

What does the passage mainly discuss? According to the passage, why do ants use different compounds as trail pheromones?

admin2005-01-30  86
问题 What does the passage mainly discuss?
According to the passage, why do ants use different compounds as trail pheromones?
选项 A、To reduce their sensitivity to some chemicals
B、To attract different types of ants
C、To protect their trail from other species
D、To indicate how far away the food is
答案C
解析
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