高考问答秩序之光哨戒炮:蜻蜓一小时吃多少害虫
来源：百度文库 编辑：高考问答 时间：2024/04/28 21:24:02
有益动物(蜻蜓)捕食害虫(蚊子)的统计数字(一只蜻蜓一小时吃840只蚊子)
蜻蜓一小时可吃蚊子50只到100只。
蜻蜓一小时可吃蚊子50只到100只哦
蜻蜓一小时可吃蚊子50只到100只。
楼上的答案显然有误，一小时840只，即代表一分钟14只，平均每4秒吃一只，这是不可想象的。
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有益动物（蜻蜓）捕食害虫（蚊子，苍蝇）的统计数字（一只蜻蜓一小时吃20只苍蝇或840只蚊子）