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

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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 本题考查动词词义搭配。本题主干意为“火蚁利用警示信息素来______工蚁紧急事件”,选项中只有alert(警告)的语义符合上下文搭配逻辑,故A选项符合题意。
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