2. 外语
  3. Fire ants make use of an alarm pheromone to________workers to an emergency, and their scouts lay down a trail as a guide during

Fire ants make use of an alarm pheromone to________workers to an emergency, and their scouts lay down a trail as a guide during

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问题 Fire ants make use of an alarm pheromone to________workers to an emergency, and their scouts lay down a trail as a guide during mass migrations.
选项 A、alert
B、allot
C、alternate
D、adapt
答案A
解析 发生紧急情况时，火蚁利用报警信息素提醒工蚁。在大规模迁徙中负责侦查的蚁种会留下一串痕迹作为引导线索。A项alert “使警觉；使注意”，B项allot“分配，分派”，C项alternate“交替；轮流”，D项adapt“适应；改编”。
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