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What does the passage mainly discuss? Pheromone systems are relatively complex in insects that
What does the passage mainly discuss? Pheromone systems are relatively complex in insects that
admin
2004-12-28
102
问题
What does the passage mainly discuss?
Pheromone systems are relatively complex in insects that
选项
A、also communicate using sight and sound
B、live underground
C、prey on other insects
D、live in organized groups
答案
D
解析
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